[0001]The present disclosure, apparatus, a method and a program.
Background technique
[0002]
　LTE (Long Term Evolution) / LTE-A (Advanced) followed fifth generation (5G) radio access technology of the mobile communication system: as (Radio Access Technology RAT), a non-orthogonal multiple access (Non-Orthogonal Multiple Access) is Attention has been paid. In OFDMA adopted in LTE (Orthogonal Frequency-Division Multiple Access) and SC-FDMA (Single-Carrier Frequency-Division Multiple Access), radio resources (e.g., resource blocks) are allocated to without overlapping user. These methods may be referred to as orthogonal multiple access. On the other hand, in the non-orthogonal multiple access, radio resources are allocated to the user duplicate. The non-orthogonal multiple access, signal users interfere with each other, the signal of each user is extracted by the high-precision decoding on the receiving side. Non-orthogonal multiple access, in theory, it is possible to realize a high cell communication capacity than orthogonal multiple access.
[0003]
　One of the radio access technologies that are classified into non-orthogonal multiple access, SPC (Superposition Coding) include multiplexing / multiple access. SPC is a method of multiplexing on the frequency and time radio resources which at least a part of the signals of different power is allocated to overlap. On the receiving side, for reception / decoding of the multiplexed signal on the same radio resources, such as interference cancellation (Interference Cancellation) and / or repeated detection.
[0004]
　For example, Patent Documents 1 and 2, as a technique equivalent to SPC or SPC, setting approach amplitude to permit proper demodulation / decoding (or power) is disclosed. Further, for example, Patent Document 3, the method of high degree of SIC for receiving a multiplexed signal (Successive Interference Cancellation) is disclosed.
CITATION
Patent Literature
[0005]
Patent Document 1: JP 2003-78419 JP
Patent Document 2: JP 2003-229835 Patent Publication
Patent Document 3: JP 2013-247513 JP
Summary of the Invention
Problems that the Invention is to Solve
[0006]
　In the signal processing techniques, such using a non-orthogonal resources as SPC, on the receiving apparatus side, improvement of the accuracy of decoding multiplexed plurality of signals has been required. In the present disclosure, which can improve the decoding accuracy when multiplexing / multiple access using a non-orthogonal resources is performed, new and improved apparatus, proposes a method and a program.
Means for Solving the Problems
[0007]
　According to the present disclosure, as a target to each of the transmission signal sequence to be multiplexed at least partially overlap the resource blocks of frequency resources or time resources relates plurality of bit sequences to be multiplexed, it is applied to the first bit sequence that the second constellation map, corresponding to the symbol position of the first bit sequence in a first constellation, processing unit to be applied to the second bit string, device comprising a are provided.
[0008]
　Further, according to the present disclosure, as a target to each of the transmission signal sequence in which at least a part of frequency resources or time resources are multiplexed in the resource block that overlaps relates plurality of bit sequences to be multiplexed, the first bit sequence the second constellation map, corresponding to the symbol position of the first bit string in the applied first constellation is, be applied to the second bit sequence, the method comprising is provided by the processor.
[0009]
　Further, according to the present disclosure, a computer, as a target to each of the transmission signal sequence to be multiplexed at least partially overlap the resource blocks of frequency resources or time resources relates plurality of bit sequences to be multiplexed, first the second constellation map, corresponding to the symbol position of the first bit string, the processing unit is applied to the second bit string, a program to function as is provided in the first constellation to be applied in the bit sequence .
Effect of the invention
[0010]
　According to the present disclosure described above, it is possible to multiplex / multiple access using a non-orthogonal resources to further improve the decoding accuracy when performed. Incidentally, the above effect is not necessarily restrictive, with the above effects, or instead of the above effects, any effects shown herein, or other effects that may be grasped from the description, it may be achieved.
BRIEF DESCRIPTION OF THE DRAWINGS
[0011]
FIG. 1 is an explanatory diagram for explaining an example of processing in the transmitter that supports SPC.
FIG. 2 is an explanatory diagram for explaining an example of processing in the transmitter that supports SPC.
3 is an explanatory diagram for explaining an example of processing in the receiving apparatus for performing interference cancellation.
4 is a diagram showing an example of a constellation of SPC multiplexed signal.
FIG. 5 is an explanatory diagram showing an example of a schematic configuration of a system according to an embodiment of the present disclosure.
6 is a block diagram showing an example of a configuration of a base station according to the embodiment.
7 is an explanatory diagram for explaining the technical features of the base station according to the first embodiment.
8 is an explanatory diagram for explaining the technical features of the base station according to the embodiment.
9 is an explanatory diagram for explaining the technical features of the base station according to the embodiment.
FIG. 10 is a flowchart showing an example of multiplexing the flow of the processing executed in the base station according to the embodiment.
11 is a flowchart showing an example of a selection processing flow constellation performed in a base station according to the embodiment.
Is a flowchart illustrating an example of the flow of FIG. 12 applying processing constellation performed in a base station according to the embodiment.
13 is a flowchart showing an example of application processing flow constellation performed in a base station according to the embodiment.
14 is a flowchart showing an example of the application process flow of the constellation to be executed in the base station according to the embodiment.
Is a flowchart illustrating an example of the flow of FIG. 15 applying processing constellation performed in a base station according to the embodiment.
FIG. 16 is an explanatory diagram for explaining the technical features of a base station according to a first modification.
17 is a flowchart illustrating an example of a multi-processing flow executed in the base station according to the modification.
FIG. 18 is an explanatory diagram for describing the technical features of a base station according to the second embodiment.
19 is a flowchart showing an exemplary flow of a modulation process performed in the base station according to the embodiment.
FIG. 20 is an explanatory diagram for explaining the technical problem according to the third embodiment.
FIG. 21 is an explanatory diagram for describing the technical features of the base station according to the embodiment.
FIG. 22 is an explanatory diagram for describing the technical features of the base station according to the embodiment.
FIG. 23 is a flowchart showing an example of selection processing flow constellation performed in a base station according to the embodiment.
It is a block diagram showing a first exemplary configuration of FIG. 24] eNB.
It is a block diagram showing a second exemplary configuration of FIG. 25] eNB.
DESCRIPTION OF THE INVENTION
[0012]
　Reference will now be described in detail preferred embodiments of the present disclosure. In the specification and the drawings, components having substantially the same function and structure are a repeated explanation thereof by referring to the figures.
[0013]
　The description will be made in the following order.
　　1. Introduction
　　　1.1. SPC
　　　1.2. Constellation
　　　1.3. Technical challenges
　　2. Configuration example
　　　2.1. Examples schematic configuration of the system
　　　2.2. Configuration example of the base station
　　3. The first embodiment
　　　3.1. Technical features
　　　3.2. Processing of flow
　　4. Second Embodiment
　　　4.1. Technical features
　　　4.2. The flow of processing
　　5. Third embodiment
　　　5.1. Technical problems
　　　5.2. Technical features
　　　5.3. Processing of flow
　　6. Application Example
　　7. Summary
[0014]
　<< 1. Introduction
　　>> <1.1. SPC>
　The SPC, In general, allocation of power levels, while taking into account the upper limit of the total transmission power of the transmission device, it is desirable set based on the relative relationship of the path loss between the transmitter and the receiver. Instead of path loss, the reception quality (i.e., SINR) to be path gains or assumed may be used.
[0015]
　If the path loss of the distribution of power levels based on the relative relationship is set, the transmitting device, the path loss assign a higher power to larger devices addressed signals, allocating low power signal path loss is small device addressed. Incidentally, path loss, the distance between the transmitter and the receiver is increased longer, becomes small if it contains the receiving apparatus to the main lobe of the antenna directivity, increases when departing reversed. Signal assigned a higher power, the interference for lower power allocated signals of the destination of the receiver it. Therefore, in the receiving apparatus, it is required to remove using techniques SIC such interference signals.
[0016]
　In the following, with reference to FIGS. 1 to 3, illustrating the process and signals in the SPC.
[0017]
　(1) processing in each unit
　process in (a) transmitting device
　FIGS. 1 and 2 are explanatory diagrams for explaining an example of processing in the transmitter that supports SPC. Referring to FIG. 1, for example, a user A, each bit stream of the user B and the user C (e.g., transport blocks) are processed. For each of these bitstreams, several processing (e.g., as shown in FIG. 2) CRC (Cyclic Redundancy Check) coding, FEC (Forward Error Correction) coding, rate matching and scrambling / interleaving) It is performed, and then modulation is performed. Then, layer mapping, power allocation, precoding, SPC multiplexing resource element mapping, IDFT (Inverse Discrete Fourier Transform) / IFFT (Inverse Fast Fourier Transform), CP (Cyclic Prefix) insertion, as well as digital-to-analog and RF (Radio such as conversion to the Frequency) is carried out.
[0018]
　Especially, in the power allocation, the user A, assigned power to each of the signals of user B and user C, in SPC multiplexing, the user A, the signal of user B and user C are multiplexed.
[0019]
　(B) processing in the receiver
　Figure 3 is an explanatory diagram for explaining an example of processing in the receiving apparatus for performing interference cancellation. Referring to FIG. 3, for example, conversion from RF and analog to digital, CP removal (removal), DFT (Discrete Fourier Transform) / FFT (Fast Fourier Transform), as well as the joint interference cancellation and equalization and decoding a row divide. As a result, the user A, each bit stream of the user B and the user C (e.g., transport blocks) are obtained.
[0020]
　(2) transmit and receive signals
　(a) the downlink
　will be described a transmission signal and a reception signal of the downlink if the SPC is employed. Here, it is assumed multi-cell system such as HetNet (Heterogeneous Network) or SCE (Small Cell Enhancement).
[0021]
　Represents the index of the cell that the user u is connected to a subject in i, the number of transmit antennas of the base station corresponding to the cell N TX, i represented by. Each of the transmission antenna may also be referred to as a transmit antenna ports. Transmission signal from cell i to user u may be expressed in vector form as follows.
[0022]
[Number 1]

[0023]
[Number 2]

[0024]
[Number 3]

[0025]
[Formula 4]

[0026]
　In the above-described formula, N SS, u is a spatial transmission stream number for a user u. Basically, N SS, u is, N TX, i is a positive integer less than or equal. Vector x i, u is the spatial stream signal to the user u. Each element of this vector is basically equivalent to the digital modulation symbols such as PSK (Phase Shift Keying) or QAM (Quadrature Amplitude Modulation). Matrix W i, u is the precoding matrix for user u (Precoding Matrix). Elements in the matrix is basically a complex, it may be real numbers.
[0027]
　Matrix P i, u is the power allocation coefficient matrix for user u in a cell i. In this matrix, it is desirable that each element is a positive real number. Note that this matrix, the following diagonal matrix (i.e., other than the diagonal components are 0 matrix) may be used.
[0028]
[Formula 5]

[0029]
　If the adaptive power allocation for the spatial streams is not performed, the matrix P i, u instead of scalar values P i, u may be used.
[0030]
　In cell i, other users v not only user u is also present, the signal s of other users v i, v are also transmitted in the same radio resource. These signals are multiplexed with SPC. Signal s from the cell i after multiplexing i is expressed as follows.
[0031]
[Number 6]

[0032]
　In the above-described formula, U i is the set of users to be multiplexed in the cell i. But the cell j other than the serving cell of the user u (interference source and comprising cells for a user u), likewise transmit signal s j is generated. At the user side, such a signal is received as interference. Received signal r of the user u u may be expressed as follows.
[0033]
[Number 7]

[0034]
[Number 8]

[0035]
[Number 9]

[0036]
　In the above-described formula, the matrix H u, i is the channel response matrix for cell i and a user u. Matrix H u, i each element of is basically a complex. Vector n u is the received signal r of the user u u a noise included in. For example, the noise includes thermal noise, and interference from different systems. The average power of the noise can be expressed as follows.
[0037]
[Formula 10]

[0038]
　Received signal r u , as follows, can be represented by the desired signal and other signals.
[0039]
[Number 11]

[0040]
　In the above formula, the first term on the right side, the desired signal of the user u, the second term, the interference in the serving cell i of the user u (intra-cell interference (intra-cell interference), or multi-user interference or multi-access interference and called), the third term is the interference from cells other than the cell i called (inter-cell interference (inter-cell interference)).
[0041]
　In the case where such orthogonal multiple access (e.g., OFDMA or SC-FDMA) is employed, the received signal can be expressed as follows.
[0042]
[Number 12]

[0043]
　The orthogonal multiple access, no intra-cell interference, also signals of the other users v is not multiplexed in the same radio resource in other cells j.
[0044]
　(B) the uplink
　will be described a transmission signal and a reception signal of the uplink when the SPC is employed. Here, it is assumed multi-cell system such as HetNet or SCE. Incidentally, as a symbol representing the signal, such as diverting symbols used for the downlink.
[0045]
　Transmission signal user u is transmitted in cell i may be expressed in vector form as follows.
[0046]
[Formula 13]

[0047]
[Number 14]

[0048]
[Number 15]

[0049]
[Number 16]

[0050]
　In the above-described formula, the number of transmitting antennas, the number N of users of the transmitting antennas TX, u is. Matrix P is the power allocation coefficient matrix for user u in a cell i i, u , like the downlink case, it may be a diagonal matrix.
[0051]
　In the uplink, in the user, since it is not possible to multiplex the signals with other users of the signal of the user, the received signal of the base station of the cell i may be expressed as follows .
[0052]
[Formula 17]

[0053]
[Equation 18]

[0054]
[Number 19]

[0055]
　Unlike the case of the downlink, in the case of the uplink, the base station should be noted that it is necessary to decode all the signals from a plurality of users in a cell. Furthermore, the channel response matrix it should be noted also that different by a user.
[0056]
　Especially, among the uplink signal in the cell i, when focusing on a signal transmitted by a user u, the received signal can be expressed as follows.
[0057]
[Number 20]

[0058]
　In the above formula, the first term on the right side, the desired signal of the user u, the second term, the interference in the serving cell i of the user u (intra-cell interference, or, referred to as multi-user interference or multi-access interference), the third term is the interference from cells other than the cell i (referred to as inter-cell interference).
[0059]
　In the case where such orthogonal multiple access (e.g., OFDMA or SC-FDMA) is employed, the received signal can be expressed as follows.
[0060]
[Number 21]

[0061]
　The orthogonal multiple access, no intra-cell interference, also signals of the other users v is not multiplexed in the same radio resource in other cells j.
[0062]
　　<1.2. Constellation>
　transmission signal sequence consisting of bit strings (i.e., signal) is transmitted after the modulation process. During modulation, the bit sequence is mapped to a signal point on the complex plane (also called symbols). Correspondence between the bit sequence and the signal point constellation, constellation mapping, also called symbol mapping, or symbol constellation or the like.
[0063]
　In general, it is desirable to Gray mapped constellation is used. The Gray mapping, refers to the combination of bit string corresponding to adjacent symbols in the complex plane, it does not differ at most 1 bit. If Gray mapped constellation is used, even if the receiver fails to decode, when the decoding is, bit error is at most 1 bit as next symbol, for example correct symbol.
[0064]
　As an example, in Tables 1 to 3 below, showed 64QAM, 16QAM, and in each modulation scheme QPSK, the Gray mapped constellation, the correspondence between the coordinates on the bit stream and the IQ plane. Table 1, six bits per symbol indicates the correspondence between the representable 64QAM. Table 2, four bits per symbol indicates the correspondence between the representable 16QAM. Table 3, 2 bits per symbol indicates the correspondence between the representable QPSK.
[0065]
[Table 1]

[0066]
[Table 2]

[0067]
[table 3]

[0068]
　　<1.3. The technical problem>
　In SPC, signals are multiplexed after applying the power allocation to the modulated symbols. Here, if the Gray mapped constellation applied signal is multiplexed, the multiplexed after the constellation (i.e., correspondence between the set and the symbol of the bit stream to be multiplexed), when no longer a Gray mapping there is. As an example, it is shown in FIG. 4, in the case of multiplexing two signals modulated with the QPSK, the constellation after multiplexing.
[0069]
　Figure 4 is a diagram showing an example of a constellation of SPC multiplexed signal. The numbers attached to each symbol shows the corresponding bit string. Amplitude magnitude relationship between the two QPSK constellation (code 20A and 20B) correspond to the magnitude of allocated power. Of the bit string corresponding to the symbol of the SPC multiplexed signal constellation (code 20C), 2 bits of the first half, the signal allocated power is large (i.e., a signal constellation 20A is applied) corresponding to the bit string of . Each of the corresponding bit string, are underlined respectively in FIG. Further, two bits of the second half is allocated less power signal (i.e., signal constellation 20B is applied) corresponding to the bit string. The Each of the corresponding bit sequence are denoted respectively on the line in FIG.
[0070]
　As shown in FIG. 4, two constellations 20A and 20B of the QPSK, each of which is Gray mapping. On the other hand, constellation 20C of SPC multiplexed signal is not gray mapping. Specifically, the adjacent symbols across the I and Q axes, the corresponding bit sequence to each other are 2-bit differences. For example, adjacent to each other with the I-axis and "0001", "0100", a total of 2 bits of the second bit and the fourth bit is different.
[0071]
　If constellation SPC multiplexed signal is not gray mapping, the receiver fails to decode, when the decoding is as adjacent symbols example across the correct symbol and the I and Q axes, 2 or more bits errors may occur. The occurrence of such two or more bits of bit errors, causes degradation of decoding characteristics of the receiver. Such a bit error, the maximum likelihood detected by the receiving apparatus: if (MLD Maximum Likelihood Detection) method is used, generated especially significant.
[0072]
　Under such circumstances, not only before multiplexing constellation after SPC multiple also, it is desirable that the gray mapping is achieved. Therefore, in this embodiment, it provides a mechanism to achieve this.
[0073]
　<< 2. Configuration example
　　>> <2.1. Schematic configuration example of the system>
　Next, with reference to FIG. 5, illustrating a schematic configuration of a system 1 according to an embodiment of the present disclosure. Figure 5 is an explanatory diagram showing an example of a schematic configuration of a system 1 according to an embodiment of the present disclosure. Referring to FIG. 5, the system 1 includes a base station 100 and the terminal device 200. Here, the terminal device 200 is also called a user. The user, user equipment (User Equipment: UE) and may also be referred to. Here the UE can be a UE that is defined in the LTE or LTE-A, it may mean more generally communication equipment.
[0074]
　(1) the base station 100
　the base station 100 is a base station of a cellular system (or mobile communication systems). Base station 100, the terminal device (e.g., terminal 200) located in the cell 10 of the base station 100 performs radio communication with. For example, the base station 100 transmits downlink signals to the terminal device, receives uplink signals from the terminal device.
[0075]
　(2) the terminal device 200
　the terminal device 200 can communicate in a cellular system (or mobile communication systems). Terminal device 200 performs wireless communication with a base station of a cellular system (e.g., base station 100). For example, the terminal device 200 receives the downlink signal from the base station, transmits an uplink signal to the base station.
[0076]
　(3) multiplexing / multiple access
　in an embodiment of among others the disclosure, the base station 100, the non-orthogonal multiple access, performs radio communication with a plurality of terminal devices. More specifically, the base station 100, the multiplexing / multiple access using the power allocation, performs radio communication with a plurality of terminal devices. For example, the base station 100, the multiplexing / multiple access using SPC, performs radio communication with a plurality of terminal devices.
[0077]
　For example, the base station 100, in the downlink, by multiplexing / multiple access using SPC, performs radio communication with a plurality of terminal devices. More specifically, for example, base station 100, a signal to a plurality of terminal devices are multiplexed with SPC. In this case, for example, terminal device 200, the desired signal (i.e., signal to the terminal device 200) from the multiplexed signal including, to remove one or more other signals as interference, decoding the desired signal.
[0078]
　The base station 100, instead of the downlink, or with the downlink, in the uplink, the multiplexing / multiple access using SPC, may perform radio communication with a plurality of terminal devices. In this case, the base station 100, from the multiplexed signal including a signal transmitted by the plurality of terminal devices may decode each of the signals.
[0079]
　　＜２．２．基地局の構成例＞
　続いて、図６を参照して、本開示の一実施形態に係る基地局１００の構成を説明する。図６は、本開示の一実施形態に係る基地局１００の構成の一例を示すブロック図である。図６を参照すると、基地局１００は、アンテナ部１１０、無線通信部１２０、ネットワーク通信部１３０、記憶部１４０及び処理部１５０を備える。
[0080]
　（１）アンテナ部１１０
　アンテナ部１１０は、無線通信部１２０により出力される信号を電波として空間に放射する。また、アンテナ部１１０は、空間の電波を信号に変換し、当該信号を無線通信部１２０へ出力する。
[0081]
　（２）無線通信部１２０
　無線通信部１２０は、信号を送受信する。例えば、無線通信部１２０は、端末装置へのダウンリンク信号を送信し、端末装置からのアップリンク信号を受信する。
[0082]
　（３）ネットワーク通信部１３０
　ネットワーク通信部１３０は、情報を送受信する。例えば、ネットワーク通信部１３０は、他のノードへの情報を送信し、他のノードからの情報を受信する。例えば、上記他のノードは、他の基地局及びコアネットワークノードを含む。
[0083]
　（４）記憶部１４０
　記憶部１４０は、基地局１００の動作のためのプログラム及び様々なデータを一時的に又は恒久的に記憶する。
[0084]
　(5) processing unit 150
　processing unit 150 provides various functions of the base station 100. Processing unit 150 includes a selection unit 151 and the transmission processing unit 153. The processing unit 150 may further include other components other than these components. That is, processor 150 may perform also the operation other than the operation of these components.
[0085]
　Operation of the selection unit 151 and the transmission processing unit 153 will be described in detail later.
[0086]
　<< 3. >> first embodiment
　Subsequently, with reference to FIGS. 7 to 15, for explaining the first embodiment.
[0087]
　　<3.1. Technical features>
　(1) SPC multiple
　base stations 100 (e.g., the transmission processing unit 153) multiplexes the transmission signal sequence of a plurality of power layers by using the power allocation. In other words, the transmission signal sequences transmitted from the base station 100 is multiplexed with the power allocation. In this specification, the term "multiplexing the power layer" is synonymous with "for multiplexing the signal of the power layer". Further, the expression "power layer allocating power" is synonymous with "allocating power to signal power layer".
[0088]
　The base station 100 performs power allocation at an arbitrary reference. Referring to FIG. 7, an example of the relationship between power allocated power layer.
[0089]
　Figure 7 is an explanatory diagram for explaining an example of power allocation to the power layer. The horizontal axis is the frequency resources and / or time resources, and the vertical axis represents the power level (the height of the assigned power). Referring to FIG. 7, N-number of power layers that are multiplexed with SPC (power layer 0 ~ power Layer N-1) are shown. The numbers from the 0 ~ N-1, also referred to as the index of the power layer. The height of the power layer (i.e., the vertical width) indicates the height of the assigned power. In the example shown in FIG. 7, a high power assigned as the index is smaller power layer, for example, the power P 0 is P 1 higher than, P 1 is P 2 higher than, P N-1 is the lowest. Transmission signal sequences to be multiplexed with the SPC is transmitted using at least one power layer.
[0090]
　However, the relationship between the power allocated to the index of the power layer is not limited to the example shown in FIG. For example it may be other than 0 is the index of the power layer highest power is allocated, also the power allocated as the index is smaller power layers may be low.
[0091]
　(2) constellation selection process
　base station 100 (e.g., selector 151) selects a constellation that is applied to each transmission signal sequence to be multiplexed. Then, the base station 100 (e.g., the transmission processing unit 153) is a constellation that is selected, is applied to each transmission signal sequence.
[0092]
　Here, for convenience of explanation, the number of transmission signal sequences to be multiplexed is assumed to be 2. Of course, the number of transmission signal sequences to be multiplexed may be three or more. Allocated power called a bit string of higher than the other transmission signal sequences and the first bit sequence assigned power referred a bit string of low transmission signal sequences from the other as the second bit string. The base station 100 selects the constellation to be applied to each of the first bit string and second bit string. The constellation that is applied to the first bit sequence referred to as a first constellation, referred to the constellation which is applied to the second bit sequence with the second constellation map. Here, the first and second constellation applies to individual bit sequence is assumed to be gray mapping.
[0093]
　Base station 100, in accordance with one of the bit string, to select the constellation to be applied to the other bit string. Specifically, the base station 100 selects the second constellation map, corresponding to the symbol position of the first bit sequence in a first constellation to be applied to the first bit sequence. Figure 8 is a transmitting device (e.g., wireless communication unit 120) performing such selection is an explanatory diagram for explaining an example of processing in. As shown in FIG. 8, the physical layer set controller (e.g., operating under the control of the processing unit 150) acquires information from the modulator for modulating the bit sequence of the first transmission signal sequences. Specifically, physical layer setting controller acquires information indicating the first symbol position of the bit string of the first constellation to be applied to the first bit sequence. Then, as shown in FIG. 8, the physical setting controller instructs to the modulator for modulating the bit sequence of the second transmission signal sequences. Specifically, physical layer setting controller instructs to apply a second constellation that is selected based on the acquired information. Then, power is allocated to each of the signals output from the modulator. For example, the signal of the first transmission signal sequence is assigned higher power, lower power is allocated to the second signal of the transmission signal sequence of. Then, after various processing, signals of the two transmission signal sequences is SPC multiplexed.
[0094]
　The following describes a method of selecting the second constellation map in detail.
[0095]
　For example, the base station 100 corresponds to the adjacent symbols in the first constellation, so that each of the second constellation map, a bit string corresponding to the symbol of the end of the adjacent directions are the same, the second to select the constellation. Those Here, the direction in which adjacent in this embodiment, I direction (i.e., I-axis positive direction or I-axis negative direction) is either or Q direction (i.e., Q-axis positive direction or Q-axis negative direction) to. In this regard, with reference to FIG. 9 will be described specifically for the two signals modulated with the QPSK.
[0096]
　Figure 9 is an explanatory diagram for explaining a process of selecting a constellation according to the present embodiment. The first constellation map to be applied to the first bit string indicated at 21A. On the other hand, it shows a second constellation that is applied to the second bit sequence to the code 21B ~ 21E. For example, if the first bit sequence is "00", the second bit string is applied a second constellation 21B. Also, if the first bit sequence is "10", the second bit string is applied a second constellation 21C. Also, if the first bit sequence is "11", the second bit string is applied a second constellation 21D. Also, if the first bit sequence is "01", the second bit string is applied a second constellation 21E. Incidentally, the meaning of the underline and overline attached to each of the bit sequence in the figure is the same as FIG.
[0097]
　It is a symbol adjacent to the first constellation map 21A, for example, a second constellation that corresponds to the "00" and "10" is the second constellation map 21B and code 21C, respectively. In the first constellation map 21A, the direction is to the "00", "10" is the negative direction I axis. Meanwhile, in the first constellation map 21A, the direction is to the "10", "00" is the I-axis positive direction. Therefore, the bit string corresponding to the symbol of the I-axis negative direction of the end portion of the second constellation map 21B corresponding to "00" in the first constellation 21A (i.e., "10" and "11"), the first second constellation map 21C of I-axis positive direction end bit string corresponding to the symbol corresponding to "10" in the constellation 21A (i.e., "10" and "11") is the same as. This relationship is another adjacent symbols in the first constellation, "10", "11", "11", "01", and "01", "00" to likewise consists ing.
[0098]
　Here, the relationship, the second constellation each other corresponding to the adjacent symbols in the first constellation is one which is inverted in the adjacent direction, and it is possible to capture well. For example, the second constellation map 21B in I-axis negative direction (i.e., in the Q-axis) is obtained by inverting, the second constellation 21C. Similarly, the second constellation map 21C in the I-axis positive direction (i.e., in the Q-axis) is obtained by inverting, the second constellation map 21B. This relationship is another adjacent symbols in the first constellation, "10", "11", "11", "01", and "01", "00" to likewise consists ing.
[0099]
　Further, the above relationship is established by one symbol to be a reference in the first constellation, the symbol corresponding to the first bit sequence, depending on the deviation from the reference symbols, selecting a second constellation It can be realized by. For example, the base station 100, when the first symbols corresponding to the bit string, an odd number shift symbols in the I-axis positive direction (or I-axis negative direction) from the reference symbols, the corresponding to the reference symbols the second constellation I-axis positive direction (or I-axis negative direction) (i.e., in the Q-axis) is selected which is reversed. Further, the base station 100, when the first symbols corresponding to the bit string, an odd number shifted symbols from the reference symbols in Q-axis positive direction (or Q-axis negative direction), the corresponding to the reference symbols the second constellation Q-axis positive direction (or Q-axis negative direction) (i.e., the I-axis) selects obtained by inverting. Further, the base station 100, the symbols a symbol corresponding to the first bit string, displaced an odd number from the reference symbols in the I-axis positive direction (or I-axis negative direction) and the Q-axis positive direction (or Q-axis negative direction) If it is, the second constellation map, corresponding to the reference symbols in the I-axis positive direction (or I-axis negative direction) and the Q-axis positive direction (or Q-axis negative direction) (i.e., in the Q-axis and the I axis ) to select the one which is obtained by inverting.
[0100]
　For example, in the example shown in FIG. 9, the symbol corresponding to "00" in the first constellation indicated by reference numeral 21A and the reference symbol. In that case, the symbol corresponding to "10", because it is one shifted symbols I-axis negative direction from the reference symbols, the base station 100, a second constellation 21B corresponding to the reference symbol Q axis in selecting the second constellation 21C obtained by inverting. Also, the symbols corresponding to "01", because it is one shifted symbols to Q-axis negative direction from the reference symbols, the base station 100, a second constellation 21B corresponding to the reference symbols in the I-axis selecting a second constellation 21E obtained by inverting. Also, the symbols corresponding to "11", because it is one shifted symbols I-axis negative direction and the Q-axis negative direction from the reference symbols, the base station 100, the second constellation corresponding to the reference symbols 21B to select the second constellation 21D obtained by inverting in Q axis and the I axis.
[0101]
　Code 21F in FIG. 9 shows a constellation of SPC multiplexed signal. Referring to constellation 21F, it can be seen that the gray mapping is achieved. For example, a bit string with each other corresponding to adjacent symbols in each quadrant are respectively 1-bit difference. Further, the adjacent symbols across the I and Q axes, the corresponding bit sequence to each other is also a 1-bit difference. For example, "0001" and "0101" neighboring across the I axis, a total of 1 bit of the second bit only is different.
[0102]
　Thus, by using the second constellation selected by the method described above, not only before multiplexing constellation after SPC multiple also, so that the gray mapping is achieved. Accordingly, even if the receiver fails to decode, for example, when the decoding is as correct next symbol of the symbol rather than the bit error of two bits or more occurs, the bit error will be at most 1 bit. Thus, it is possible to prevent deterioration in decoding performance of the receiver.
[0103]
　Incidentally, when the number of transmission signal sequences to be multiplexed is 3 or more, it is performed first select the constellation described above in relation the two transmission signal sequences, then multiplexed transmission signal sequence and multiple so that the reduction before the selection of the constellation described above in relation to the transmission signal sequence is performed. That is, even the number of transmission signal sequences to be multiplexed is three or more, the present technique is applicable.
[0104]
　Further, in the above it has been described by way of example a QPSK, but the present technology, BPSK, may employ any modulation scheme such as 16QAM. Furthermore, in the first bit string and second bit string, it may be different modulation schemes.
[0105]
　In Tables 4 to 7 below, the first constellation 21A, and the second constellation map 21B-21E, it shows the correspondence between the coordinates on the bit stream and the IQ plane. Table 4 shows the correspondence between the first constellation 21A and second constellation 21B. Table 5, correspondence, that is, the correspondence relationship is reversed in the Q axis in the second constellation 21C. Table 6, the correspondence relationship, that is, the correspondence relationship is reversed in the I axis in the second constellation 21E. Table 7 correspondence, that is, the correspondence relationship is reversed in the I-axis and Q axis in the second constellation 21D.
[0106]
[Table 4]

[0107]
[table 5]

[0108]
[Table 6]

[0109]
[Table 7]

[0110]
　Further, in Tables 8 to 11 below, the first constellation and a second constellation in the case of 16QAM, showing the correspondence between the coordinates on the bit stream and the IQ plane. Table 8, first constellation and shows the correspondence relationship in the second constellation is not inverted. Table 9 shows the correspondence between the second constellation map obtained by inverting the first constellation map in the Q axis. Table 10 shows the correspondence relationship in the second constellation a first constellation is inverted in the I-axis. Table 11 a first constellation shows the correspondence relationship in the second constellation is inverted in the I and Q axes.
[0111]
[Table 8]

[0112]
[Table 9]

[0113]
[Table 10]

[0114]
[Table 11]

[0115]
　Further, in Tables 12 to Table 15 below, showed the correspondence between the first constellation and a second constellation, on the bit string and the IQ plane coordinates in the case of 64QAM. Table 12, first constellation and shows the correspondence relationship in the second constellation is not inverted. Table 13 shows the correspondence between the second constellation map obtained by inverting the first constellation map in the Q axis. Table 14 shows the correspondence between the second constellation a first constellation is inverted in the I-axis. Table 15 a first constellation shows the correspondence relationship in the second constellation is inverted in the I and Q axes.
[0116]
[Table 12]

[0117]
[Table 13]

[0118]
[Table 14]

[0119]
[Table 15]

[0120]
　(3) modulated based on the subsequent signal processing than the determination
　the base station 100 (e.g., the transmission processing unit 153) is modulated (i.e., the first and the application of the second constellation) to the contents of the subsequent signal processing than in response, it may determine whether to apply the second constellation selected by the selecting process to the second bit string. Thus, for example, even when applying a second constellation selected by the selection process, in case that the gray mapping is not achieved, it is possible to omit the selection process. When it is determined not to apply, for example, the default constellation (e.g., first constellation map of the same as) are applied.
[0121]
　For example, if the base station 100, both on the same transmission weights of the transmission signal sequence and transmission signal sequence of the second bit sequence of the first bit string is applied, or that to both not apply the transmission weighting, the selection the second constellation selected by the processing may be applied to the second bit sequence. If different transmission weighting is, as described in detail later with reference to FIG. 20, it is because it is difficult to realize the gray mapping. Moreover, also because of backward compatibility. As the transmission weighting e.g. precoding (Precoding) or beamforming (Beam-forming), and the like, weighted by complex coefficients is performed.
[0122]
　The base station 100, in addition to transmission weight as described above, when the same transmission settings are applied to both of the transmission signal sequence and transmission signal sequence of the second bit string in the first bit sequence, was selected by the selection process the second constellation map may be applied to the second bit sequence. Also for transmission set other than the transmission weights, when the transmission setting are different from each other in order to obtain it is difficult to realize the gray mapping. As the transmission setting, for example, a transmission mode, and the like. That is, the base station 100, when both transmission signal sequence of the same transmission mode is applied, in addition may be applied a second constellation selected by the selecting process to a second bit sequence, the transmission setting, spatial multiplexing (spatial multiplexing or spatial Division multiplexing, etc.) in a MIMO or spatial diversity (transmit diversity, space-Time Block / Trellis Coding, or space-Frequency Block / Trellis Coding) spatial multiplexing number in (i.e., the space the number of layers), and the like number of transmission antennas and the like. For example, the base station 100, if the spatial multiplexing processing or spatial diversity processing of the same spatial multiplexing number in both the transmission signal sequence is applied, the second constellation selected by the selecting process to the second bit string application may be. Further, the base station 100, when both the same number of transmit antennas to the transmission signal sequence in is utilized, may be applied to second constellation selected by the selecting process to the second bit string.
[0123]
　For example, the base station 100, depending on the channel used for transmission of the transmission signal sequence and transmission signal sequence of the second bit string in the first bit string, the second constellation selected by the selection processing second bit sequence it may determine whether to apply the. Specifically, the base station 100, both the transmission signal sequence and transmission signal sequence of the second bit sequence of the first bit string, the data channel (Data Channel), a common channel (Shared Channel), or a dedicated channel (Dedicated If it sent with the Channel), to apply a second constellation selected by the selecting process to the second bit string. Since, SPC multiplexing is basically the channel, such as a plurality of receiving apparatus receives such a control channel is because it is considered unfit in terms of compatibility.
[0124]
　The same is true for the channel to be received by the plurality of receiving devices as multicast channels and broadcast channels. Therefore, the base station 100, in response to the transmission signal sequence and transmission signal sequence of each of the destination of the second bit sequence of the first bit string, the second constellation selected by the selecting process to the second bit string whether it applied to may be determined. For example, the base station 100, each of the destination of transmission signal sequences and the transmission signal sequence of the second bit sequence of the first bit string is a single device (i.e., a unicast) if, the selection process may be applied to second constellation was selected second bit sequence by. Further, the base station 100, if the destination of the transmission signal sequence and transmission signal sequence of the second bit sequence of the first bit sequence is different from, and apply a second constellation selected by the selecting process to the second bit string it may be.
[0125]
　Of course, the base station 100, each of the destination of transmission signal sequences of the transmission signal sequence and the second bit sequence of the first bit string is a plurality of devices (i.e., a multicast or broadcast) when, the selection process may be applied to second constellation was selected second bit sequence by. Further, the base station 100, if the destination of the transmission signal sequence of the first bit string is a plurality of devices, regardless of the destination of the transmission signal sequence in the second bit string, the second Konsuta selected by the selection process configuration may be applied to the second bit sequence.
[0126]
　　<3.2. Process Flow>
　FIG. 10 is a flowchart illustrating an example of a multi-processing flow executed in the base station 100 according to this embodiment.
[0127]
　As shown in FIG. 10, first, the base station 100 (e.g., selector 151) acquires a modulation level to be applied to the signal of interest (step S102). Here, the modulation level, which corresponds to each modulation scheme BPSK, QPSK, etc. 16QAM and 64QAM. The modulation level may be a number of bits per symbol (if BPSK 1bit / symbol, if QPSK 2bit / symbol, if 16QAM 4bit / symbol, if 64QAM 6bit / symbol).
[0128]
　Then, the base station 100 (e.g., selector 151), the signal of interest determines whether at least a portion of which is other signals multiplexed in the same frequency resource or time on the resource (step S104). Also, if it is determined to be multiplexed (step S104 / YES), the base station 100 (e.g., selector 151), compared with other signals to be multiplexed, smaller for power allocated to the signal of interest determines whether (step S106).
[0129]
　If towards the power allocated to the signal of interest is determined to be smaller (step S106 / YES), the base station 100 (e.g., selector 151) performs constellation selection process (step S108). Specifically, the base station 100, other signals (i.e., the first transmission signal sequence) to be multiplexed second Konsuta corresponding to the first symbol position of the bit string of the first constellation to be applied to the bit string to select the configuration. On the other hand, when it is determined that the power allocated to the target signal is large (step S106 / NO), the base station 100 (e.g., selector 151) selects a predetermined constellation (step S110). For example, the base station 100 (selecting unit 151) selects the default constellation (e.g., first constellation same thing as).
[0130]
　Then, the base station 100 (e.g., the transmission processing unit 153) applies the constellation was selected as the target of the signal (i.e., the second transmission signal sequence) (step S112). Thereafter, the base station 100 (e.g., the transmission processing unit 153), the signal multiplexing and other signal of interest after modulation (step S114).
[0131]
　On the other hand, the signal of interest is, if it is determined that at least a part is not other signals multiplexed in the same frequency resource or time on the resource (step S104 / NO), the base station 100 (e.g., selector 151) selects a predetermined constellation (step S116). For example, the base station 100 (selecting unit 151) selects the default constellation (e.g., first constellation same thing as). Then, the base station 100 (e.g., the transmission processing unit 153) applies the constellation was selected as the target of the signal (i.e., the second transmission signal sequence) (step S118).
[0132]
　Thus, application processing of the constellation is completed.
[0133]
　Figure 11 is a flow chart showing an example of selection processing flow constellation executed in the base station 100 according to this embodiment. This flow corresponds to step S108 in FIG. 10.
[0134]
　As shown in FIG. 11, first, the base station 100 (e.g., selector 151) acquires a modulation level to be applied to the first transmission signal sequences (step S202). Then, the base station 100 (e.g., selector 151) acquires a modulation level to be applied to the second transmission signal sequences (step S204). Then, the base station 100 (e.g., selector 151) specifies the symbol corresponding to the first bit sequence in a first constellation (step S206). Then, the base station 100 (e.g., selector 151), a constellation corresponding to the reference symbol and the candidate of the second constellation map (step S208).
[0135]
　Then, the base station 100 (e.g., selector 151), the symbol corresponding to the first bit sequence determines whether displaced an odd number from the reference symbols in the I-axis positive direction (or I-axis negative direction) ( step S210). If it is determined that the odd number shift to the I-axis positive direction (step S210 / YES), the base station 100 (e.g., selector 151) inverts the candidate of the second constellation map in the Q axis (step S212 ). If it is determined that the even number shift to the I-axis positive direction (step S210 / NO), the process in the step S212 is skipped.
[0136]
　Then, the base station 100 (e.g., selector 151), the symbol corresponding to the first bit sequence determines whether displaced an odd number from the reference symbols in Q-axis positive direction (or Q-axis negative direction) (step S214). If it is determined that the odd number shift on Q-axis positive direction (step S214 / YES), the base station 100 (e.g., selector 151), the candidate of the second constellation is inverted in the I-axis (step S216 ). If it is determined that the even number shift on Q-axis positive direction (step S214 / NO), the process in the step S216 is skipped.
[0137]
　Thus, the selection process of the constellation is completed.
[0138]
　Subsequently, referring to FIGS. 12 to 15, the application processing of the constellation comprising a determination based on the subsequent signal processing is described than the modulation. Figure 12 is a flowchart showing an example of application processing flow constellation executed in the base station 100 according to this embodiment.
[0139]
　As shown in FIG. 12, first, the base station 100 (e.g., selector 151) acquires a modulation level to be applied to the signal of interest (step S302). Thereafter, the base station 100 (e.g., selector 151) performs in step S304 ~ S316, or performs constellation selection process, or the determination selecting a predetermined constellation.
[0140]
　Specifically, first, the base station 100, the signal of interest, determines whether at least partially at the same frequency resource or time on the resource, is another signal multiplexed (step S304). Then, the base station 100, as compared with other signals to be multiplexed, determines whether towards power allocated to the signal of interest is small (step S306). Then, the base station 100 determines whether or not the other signal the same transmission weights and the target signal is applied (step S308). Then, the base station 100 determines the signal of interest whether the same transmission mode and other signals are applied (step S310). Then, the base station 100 determines the signal of interest whether spatial multiplexing number identical to the other signals are applied (step S312). Then, the base station 100 determines the target of the signal data channel, whether a common channel or a dedicated channel is used (step S314). Then, the base station 100, the signal of interest determines whether the unicast (step S316).
[0141]
　If these criteria determination are all YES, the base station 100 (e.g., selector 151) performs constellation selection process (step S318). Processing here is the same as step S108 of FIG. 10, is as described above with reference to FIG. 11. On the other hand, more than any one if NO, the base station 100 (e.g., selector 151) selects a predetermined constellation (step S320).
[0142]
　Then, the base station 100 (e.g., the transmission processing unit 153) applies the constellation was selected as the target of the signal (step S322).
[0143]
　Thus, application processing of the constellation comprising a determination based on the subsequent signal processing than the modulation is terminated.
[0144]
　Figure 13 is a flowchart showing an example of application processing flow constellation executed in the base station 100 according to this embodiment. Flow shown in FIG. 13, the step S314 and step S316 in FIG. 12, which was transferred to a stage preceding step S304, the contents are the same, and a detailed description thereof will be omitted.
[0145]
　Figure 14 is a flowchart showing an example of application processing flow constellation executed in the base station 100 according to this embodiment. Flow shown in FIG. 14 are those in which the flow step S316 that shown in FIG. 12 is replaced in step S317. In step S317, the base station 100, the destination of the signal of interest and the other signal determines whether the multicast or broadcast. Description of the flow shown in FIG. 14, the description of step S316 that with respect to Figure 12, it may be read as the description of step S317.
[0146]
　Figure 15 is a flowchart showing an example of application processing flow constellation executed in the base station 100 according to this embodiment. Flow shown in FIG. 15, the step S314 and step S317 in FIG. 14, which was transferred to a stage preceding step S304, the contents are the same, and a detailed description thereof will be omitted.
[0147]
　　<3.3. First modification>
　In the above, in order to realize the gray mapping in the constellation after multiplexing, select the second constellation map is performed, has a second constellation that is selected is applied to the second bit string It was. Thus, the gray mapping is possible signal achieved is generated in the constellation after multiplexing. In contrast, in the present modification, the second bit string conversion processing after modulation (i.e., phase and / or amplitude conversion. May also be seen as the conversion of the symbol arrangement), the gray in constellation after multiple mapping feasible signal is generated. The final output is the same when the the present modification selection of the second constellation map is performed. That is, the process for generating a possible signal realized Gray mapping in the constellation after multiplexing may be implemented by selecting the second constellation map, it is implemented by conversion of the modulated good. The difference between these methods is a difference in the implementation, not the difference between essential techniques.
[0148]
　Figure 16 is a transmitting device (e.g., wireless communication unit 120) that converts the symbol arrangement after modulation is an explanatory diagram for explaining an example of processing in. As shown in FIG. 16, the physical layer set controller (e.g., operating under the control of the processing unit 150) acquires information from the modulator for modulating the first transmit signal sequence. Specifically, physical layer setting controller acquires information indicating the first symbol position of the bit string of the first constellation to be applied to the first bit sequence. Note that the first constellation map and second constellation map is assumed to be identical. Then, as shown in FIG. 16, the physical setting controller performs an instruction to the converter for performing conversion processing as the target symbol of the bit sequence of the second transmission signal sequence output from the modulator. Specifically, physical layer setting controller instructs to perform and results applied in the second constellation modulator selected in the transmitter shown in FIG. 8, a conversion to achieve the same symbol arrangement . Thus, in FIG. 8, a signal a second transmission signal sequence is output from the input modulator, the signal output from the transducer 16, the first and is input to both the transmitting device so that the second transmission signal sequence matches if the same. Then, power is allocated to each of the second transmission signal sequence of the signal outputted from the first transmission signal sequence of the signal and the transducer output from the modulator. For example, the signal of the first transmission signal sequence is assigned higher power, lower power is allocated to the second signal of the transmission signal sequence of. Then, after various processing, signals of the two transmission signal sequences is SPC multiplexed.
[0149]
　Subsequently, referring to FIG. 17 is a flowchart illustrating an example of a multi-processing flow executed in the base station 100 according to this modification.
[0150]
　As shown in FIG. 17, first, the base station 100 (e.g., selector 151) acquires a modulation level to be applied to the signal of interest (step S132).
[0151]
　Then, the base station 100 (e.g., selector 151) selects a predetermined constellation (step S134). For example, the base station 100 (selecting unit 151) selects the default constellation (e.g., first constellation same thing as).
[0152]
　Then, the base station 100, base station 100 (e.g., the transmission processing unit 153) applies the constellation was selected as the target of the signal (i.e., the second transmission signal sequence) (step S136).
[0153]
　Then, the base station 100 (e.g., selector 151), the signal of interest determines whether at least a portion of which is other signals multiplexed in the same frequency resource or time on the resource (step S138). If it is determined not to be multiplexed (step S138 / NO), the process ends. On the other hand, if it is judged to be multiplexed (step S138 / YES), the base station 100 (e.g., selector 151), compared with other signals to be multiplexed, the smaller power allocated to the signal of interest determines whether (step S140).
[0154]
　If towards the power allocated to the signal of interest is determined to be smaller (step S140 / YES), the base station 100 (e.g., the transmission processing unit 153) performs conversion processing (step S142). Specifically, the base station 100, other signals (i.e., the first transmission signal sequence) to be multiplexed second Konsuta corresponding to the first symbol position of the bit string of the first constellation to be applied to the bit string configuration is such that signals of the same signal generated is generated when it is applied to the target signal and converts the phase and / or amplitude of the modulated signal in step S136 (i.e., converts the symbol arrangement). Thereafter, the base station 100 (e.g., the transmission processing unit 153) multiplexes the signal of interest and the other signal after conversion (step S144).
[0155]
　On the other hand, when it is determined that the power allocated to the target signal is large (step S140 / NO), the base station 100 (e.g., the transmission processing unit 153) is the target signal multiplexed with other signals ( step S144).
[0156]
　Thus, the process ends.
[0157]
　<< 4. Second Embodiment >>
　The first embodiment was in the form of SPC multiplexed after modulating each of a plurality of transmission signal sequences. Thus, as shown in FIG. 9, for example, two signals QPSK is applied is SPC multiplexed, artificially 16QAM signal has been generated. In contrast, the present embodiment generates a single combined transmission signal sequence from the bit strings extracted from a plurality of transmission signal sequences, by modulating collectively this, the same output as the first embodiment it is obtained form.
[0158]
　　<4.1. Technical features>
　FIG. 18 is an explanatory diagram for explaining the technical features of the base station 100 according to this embodiment. As shown in FIG. 18, the physical layer set controller (e.g., operating under the control of the processor 150), each of the first transmission signal sequences and the second transmission signal sequence, the bit selection and bit reordering apply. At this time, the physical layer setting controller, the bit string multiplexed in one symbol is extracted from each transmission signal sequence. Then, the physical layer setting controller modulates collectively bit strings extracted from each transmission signal sequence.
[0159]
　For example, the physical layer setting controller, two bits from the respective first transmission signal sequences and the second transmission signal sequences are selected and modulating a total of 4 bits by 16QAM. Sort As this time, the physical layer setting controller is allocated power is set to the first two bits of two bits larger side transmission signal sequence, the 2-bit transmission signal sequence of the assigned power is low side as the second half of the 2-bit frogs. The 16QAM modulation, typically, conventional constellation is Gray mapping for 16QAM is applied. Accordingly, even if the receiver fails to decode, for example, when the decoding is as correct next symbol of the symbol rather than the bit error of two bits or more occurs, the bit error will be at most 1 bit. Thus, also in this embodiment, it is possible to prevent deterioration of decoding characteristics of the receiver. Note that the modulation, to may be applied that deform the constellation that is normal Gray mapping, similar constellation and constellation after multiplexing may be applied in the first embodiment.
[0160]
　Thus, also in this embodiment, it is possible to obtain the same output as the transmission device according to the first embodiment shown in FIG. The modulated signal, after this, the resource element mapping, and various kinds of signal processing OFDM modulation or the like is applied.
[0161]
　　<4.2. Process Flow>
　FIG. 19 is a flowchart showing an exemplary flow of a modulation process performed in the base station 100 according to this embodiment.
[0162]
　As shown in FIG. 19, first, the base station 100 (e.g., the transmission processing unit 153) obtains the modulation level to be applied to the transmission signal (step S402). Here, it is assumed that 16QAM as an example.
[0163]
　Then, the base station 100 (e.g., the transmission processing unit 153) from each of the transmission signal sequence to be multiplexed, and extracts a bit string of bits corresponding to the modulation level (step S404). For example, the modulation level is 16QAM, when the number of multiplexing is 2, the base station 100 extracts from the two transmission signal sequences by two bits.
[0164]
　Then, the base station 100 (e.g., transmission processor 153) the extracted bit string was, was placed in the bit position corresponding to the allocated power synthesizing (step S406). For example, the base station 100, the 2 bits of the transmission signal sequence allocated power is larger side as the first two bits, to synthesize the 2-bit transmission signal sequence of the assigned power is smaller side as 2 bits in the second half.
[0165]
　Then, the base station 100 (e.g., the transmission processing unit 153) modulates the combined bit string (step S408). For example, the base station 100, a bit sequence of the synthesized 4 bits, modulated using a Gray mapped normal constellation for 16QAM.
[0166]
　Thus, the modulation processing ends.
[0167]
　<< 5. Third Embodiment
　　>> <5.1. Technical problem>
　In the first and second embodiments, if the transmission weight that is different for both of the transmission signal sequence of the transmitted signal sequence and the second bit sequence of the first bit string is applied, in order to realize the gray mapping further processing may be requiring. Such a situation is shown in FIG. 20.
[0168]
　Figure 20 is an explanatory diagram for explaining an example of a constellation when different transmission weights is. Meaning underlined and overlined attached to each of the bit sequence in the figure is the same as FIG. As shown in FIG. 20, the two QPSK constellation 22A and 22B, the phase difference is generated. This phase difference is caused by the difference in the transmit weights that are applied to each of the modulated signal, reflected to the symbol position. In such a signal including the phase difference of SPC multiplexed signal constellation 20C, hard to say that the Gray mapping shown in Figure 20 is realized. For example, adjacent sides of the symbol and the I-axis of surrounded by broken lines "1011" and the (e.g., closest located at a distance) symbol "1100", and two bits differ. Thus, the reception device fails to decode, when the decoding is as adjacent symbols example across the correct symbol and the I and Q axes, bit errors more than one bit may occur. The occurrence of such two or more bits of bit errors, causes degradation of decoding characteristics of the receiver.
[0169]
　Hereinafter, such a symbol constellation, also referred to as quasi non Gray mapping. Further, in a case where different transmission weights are, in each quadrant, of course, also with respect to symbols adjacent across the I and Q axes of symbols after multiplexing, which does not differ at most 1 bit the symbol arrangement, also called quasi-gray mapping. Base station 100 according to this embodiment realizes a quasi Gray mapping when different transmission weights is.
[0170]
　　<5.2. Technical features>
　base station 100 (e.g., selector 151) selects a constellation that is applied to each transmission signal sequence to be multiplexed. In this embodiment, the base station 100 selects the second constellation corresponding further transmission weights applied to each transmission signal sequence of the transmitted signal sequence and the second bit sequence of the first bit string.
[0171]
　Here, for convenience of explanation, the number of transmission signal sequences to be multiplexed is assumed to be 2. Of course, the number of transmission signal sequences to be multiplexed may be three or more. In that case, at least one pair of the plurality of transmission signal sequences, transmission weight applied is sufficient if different. Power relationship for the first bit string and second bit string is the same as the first embodiment.
[0172]
　Base station 100, in accordance with one of the bit string, to select the constellation to be applied to the other bit string. Specifically, the base station 100 selects the second constellation map, corresponding to the symbol position of the first bit sequence in a first constellation to be applied to the first bit sequence. Such selection transmitting apparatus that performs (e.g., wireless communication unit 120), for example may be implemented as 8 or 16 has been described above.
[0173]
　For example, a second constellation that is selected by the base station 100 applies the applied transmission weight, and the first bit sequence to each of the transmission signal sequence and transmission signal sequence of the second bit sequence of the first bit sequence that the first con amounts corresponding to the symbol position of the first bit sequence in constellation, in which the reference constellation is rotated. In this regard, with reference to FIG. 21 will be specifically described with respect to two signals modulated with the QPSK.
[0174]
　Figure 21 is an explanatory diagram for explaining a process of selecting a constellation according to the present embodiment. The first constellation map to be applied to the first bit string indicated at 23A. On the other hand, it shows a second constellation that is applied to the second bit sequence to the code 23B ~ 23E. For example, if the first bit sequence is "11", the second bit string is applied a second constellation 21B. Also, if the first bit sequence is "10", the second bit string is applied a second constellation 21C. Also, if the first bit sequence is "00", the second bit string is applied a second constellation 21D. Also, if the first bit sequence is "01", the second bit string is applied a second constellation 21E. Incidentally, the meaning of the underline and overline attached to each of the bit sequence in the figure is the same as FIG.
[0175]
　Here, transmission weight applied to each transmission signal sequence of the transmitted signal sequence and the second bit sequence of the first bit sequence are different. Therefore, the phase difference between the first constellation map and second constellation map is generated. Also, it puts as an example, the reference constellation and the first constellation 23A here. Base station 100, as the second constellation 2B, the reference constellation selecting constellation is rotated 0 × n degrees. In FIG. 21, the selected constellation are illustrated by further reflecting the phase difference caused by the difference in transmit weights. Here, the second constellation 2B may be taken as a reference constellation. The rotational direction is clockwise. Base station 100, as the second constellation 2C, selects a constellation of a reference constellation is rotated 90 × n degrees. Base station 100, as the second constellation map 2D, selects a constellation of a reference constellation is rotated 180 × n degrees. Base station 100, as the second constellation 2E, selects a constellation of a reference constellation is rotated 270 × n degrees. Here, n is calculated by the following equation.
[0176]
[Equation 22]

[0177]
　Here, "A", "B" in the above equation, as shown in FIG. 22, the amplitude of the corresponding symbol in each of the first constellation 23A and second constellation 23B. Further, "θ" is shown in FIG. 22, a phase difference which appears when the difference between transmission weights applied to each of the modulated signal reflected to the symbol position.
[0178]
　Code 23F of FIG. 21 shows a constellation of SPC multiplexed signal. Referring to constellation 23F, it can be seen that the quasi-Gray mapping is realized. For example, a bit string with each other corresponding to adjacent symbols in each quadrant are respectively 1-bit difference. Also, as in the surrounded by broken lines "1000" and "1100", and a 1-bit difference symbol together also the adjacent sides of the I and Q axes.
[0179]
　In this manner, by using the second constellation selected in the manner described above, so that the quasi-Gray mapping is realized by the constellation after SPC multiplexing. Accordingly, even if the receiver fails to decode, for example, when the decoding is as correct next symbol of the symbol rather than the bit error of two bits or more occurs, the bit error will be at most 1 bit. Thus, it is possible to prevent deterioration in decoding performance of the receiver.
[0180]
　　<5.3. Process Flow>
　FIG. 23 is a flowchart showing an example of selection processing flow constellation executed in the base station 100 according to this embodiment.
[0181]
　As shown in FIG. 23, first, the base station 100 (e.g., selector 151) obtains the transmission weight to be applied to other signals signals and multiplexing of the subject (step S502). Then, the base station 100 (e.g., selector 151) obtains a phase difference caused by each of the differences in transmit weights. Then, the base station 100 (e.g., selector 151) specifies the symbol corresponding to the first bit sequence in a first constellation. Then, the base station 100 (e.g., selector 151) selects the first constellation is rotated in accordance with the position and the phase difference between the symbol corresponding to the first bit sequence as a second constellation.
[0182]
　Thus, the process ends.
[0183]
　<< 6. Applications >>
　according to the disclosed technique is applicable to various products. For example, base station 100 may be implemented as a macro eNB or any type of eNB, such as small eNB (evolved Node B). Small eNB may pico eNB, such as micro eNB or Home (femto) eNB, or a eNB to cover smaller cells than macrocells. Alternatively, the base station 100 may be implemented as a base station for other types, such as NodeB or BTS (Base Transceiver Station). The base station 100 includes a main body (also referred to as a base station device) that controls the wireless communication, one or more RRH placed in a different location from the main body (Remote Radio Head) and may contain. Further, by different types of terminal to be described later to perform a temporary or semi-permanent base station function, it may operate as the base station 100. Moreover, at least some of the components of the base station 100 may be implemented in the module for a base station apparatus or base station apparatus.
[0184]
　(First applied example)
　FIG. 24 is a block diagram showing a first example of a schematic configuration of an eNB of the technology according to the present disclosure may be applied. eNB800 has one or more antennas 810, and the base station apparatus 820. Each antenna 810 and base station apparatus 820 may be connected to each other via a RF cable.
[0185]
　Each antenna 810, a single or multiple antenna elements (e.g., a plurality of antenna elements of MIMO antennas) have, is used to send and receive radio signals by the base station apparatus 820. eNB800 has a plurality of antennas 810 as shown in FIG. 24, a plurality of antennas 810, for example, may correspond to a plurality of frequency bands eNB800 uses. Although in FIG. 24 shows an example in which ENB800 has a plurality of antennas 810, ENB800 may have a single antenna 810.
[0186]
　The base station apparatus 820 includes a controller 821, a memory 822, a network interface 823 and a wireless communication interface 825.
[0187]
　The controller 821 may be, for example, a CPU DSP, or to operate the various functions of the upper layer of the base station apparatus 820. For example, the controller 821 generates a data packet from the data in the signal processed by the wireless communication interface 825, and transfers the generated packet via the network interface 823. The controller 821, the data from the plurality of baseband processor generates the bundled packets by bundling the generated bundled packets may be transferred. The controller 821, radio resource management (Radio Resource Control), radio bearer control (Radio Bearer Control), mobility management (Mobility Management), executes the control such as the inflow control (Admission Control) or scheduling (Scheduling) Logical it may have a function. Further, the control may be performed in conjunction with the periphery of the eNB or the core network node. Memory 822 includes RAM and ROM, and stores a program executed, and various control data (e.g., terminal list, such as the transmission power data and scheduling data) by the controller 821.
[0188]
　Network interface 823 is a communication interface for connecting the base station apparatus 820 to the core network 824. Controller 821 via the network interface 823 may communicate with the core network node, or other eNB. In that case, the ENB800, the core network node, or other eNB, may be connected to one another by logical interfaces (e.g., S1 interface or X2 interface). Network interface 823 may be a wired communication interface, or a wireless communication interface for wireless backhaul. If the network interface 823 is a wireless communication interface, a network interface 823 may use a higher frequency band than the frequency band used for radio communication by the wireless communication interface 825.
[0189]
　Wireless communication interface 825, LTE supports either a cellular communication system such as (Long Term Evolution) or LTE-Advanced, via the antenna 810 to provide wireless connectivity to the terminal located in the cell of ENB800. Wireless communication interface 825 typically may include such baseband (BB) processor 826 and RF circuit 827. BB processor 826, for example, the encoding / decoding may be performed such as modulation / demodulation and multiplexing / demultiplexing, each layer (e.g., L1, MAC (Medium Access Control), RLC (Radio Link Control) and PDCP (Packet Data Convergence Protocol)) to perform various signal processing. BB processor 826, instead of the controller 821 may include some or all of the logical functions described above. BB processor 826, a memory for storing a communication control program may be a module including a processor and associated circuitry to execute the program, the function of BB processor 826 may be changeable by the update of the program good. Further, the module may be a card or a blade is inserted into the slot of the base station apparatus 820, or may be a chip mounted on said card or the blade. On the other hand, RF circuit 827, a mixer may include such as filters and amplifiers, for transmitting and receiving radio signals via an antenna 810.
[0190]
　Wireless communication interface 825 includes a plurality of BB processor 826 as shown in FIG. 24, a plurality of BB processor 826 may, for example, correspond to a plurality of frequency bands eNB800 uses. The wireless communication interface 825 includes a plurality of RF circuits 827 as shown in FIG. 24, a plurality of RF circuits 827 may correspond for example to a plurality of antenna elements. Although the wireless communication interface 825 in FIG. 24 shows an example including a plurality of BB processor 826 and a plurality of RF circuits 827, a wireless communication interface 825 includes a single BB processor 826 or a single RF circuit 827 But good.
[0191]
　In eNB800 shown in FIG. 24, one or more components (selection unit 151 and / or the transmission processing unit 153) included in the base station 100 described with reference to FIG. 6, are implemented in the wireless communication interface 825 it may be. Alternatively, at least some of these components may be implemented in the controller 821. As an example, ENB800 is part of a wireless communication interface 825 (e.g., BB processor 826) or the whole, and mounted / or module including a controller 821, even if the one or more components in the modules are mounted good. In this case, the module stores (in other words, a program for executing the operation of the one or more components to the processor) processor program for functioning as the one or more components, and the program may be an execution. As another example, a program for causing a processor as the one or more components are installed in ENB800, wireless communication interface 825 (e.g., BB processor 826) also and / or controller 821 executes the program good. As described above, ENB800 as a device comprising the one or more components may be the base station device 820 or the module is provided, a program for causing a processor as the one or more components are provided it may be. The readable recording medium recording the program may be provided.
[0192]
　Further, in eNB800 shown in FIG. 24, the radio communication unit 120 described with reference to FIG. 6, the radio communication interface 825 (e.g., RF circuitry 827) may be implemented in. The antenna unit 110 may be implemented in the antenna 810. The network communication unit 130 may be implemented in the controller 821 and / or network interface 823. The storage unit 140 may be implemented in the memory 822.
[0193]
　(Second applied example)
　FIG. 25 is a block diagram showing a second exemplary configuration of an eNB of the technology according to the present disclosure may be applied. eNB830 has one or more antennas 840, the base station apparatus 850, and RRH860. Each antenna 840 and RRH860 may be connected to each other via a RF cable. The base station apparatus 850 and RRH860 may be connected to one another by high-speed line such as an optical fiber cable.
[0194]
　Each antenna 840, a single or multiple antenna elements (e.g., a plurality of antenna elements of MIMO antennas) have, is used to send and receive radio signals by RRH860. eNB830 has a plurality of antennas 840 as shown in FIG. 25, a plurality of antennas 840, for example, may correspond to a plurality of frequency bands eNB830 uses. Although in FIG. 25 shows an example in which ENB830 has a plurality of antennas 840, ENB830 may have a single antenna 840.
[0195]
　The base station apparatus 850 includes a controller 851, a memory 852, a network interface 853, a wireless communication interface 855 and connection interface 857. Controller 851, a memory 852 and a network interface 853 is similar to the controller 821, a memory 822 and a network interface 823 described with reference to FIG. 24.
[0196]
　Wireless communication interface 855 supports any of the cellular communication system such as LTE or LTE-Advanced, via the RRH860 and antenna 840 to provide wireless connectivity to terminals located in a sector corresponding to RRH860. Wireless communication interface 855 typically may include such BB processor 856. BB processor 856, except that it is connected to the RF circuitry 864 of RRH860 through the connection interface 857 is similar to the BB processor 826 described with reference to FIG. 24. Wireless communication interface 855 includes a plurality of BB processor 856 as shown in FIG. 25, a plurality of BB processor 856 may, for example, correspond to a plurality of frequency bands eNB830 uses. Although the wireless communication interface 855 in FIG. 25 shows an example including a plurality of BB processor 856, a wireless communication interface 855 may comprise a single BB processor 856.
[0197]
　Connection interface 857 is an interface for base station apparatus 850 (the radio communication interface 855) connected to the RRH860. Connection interface 857 may be a communication module for communicating with the high-speed line which connects the base station apparatus 850 (wireless communication interface 855) and RRH860.
[0198]
　Further, RRH860 comprises a connection interface 861 and a wireless communication interface 863.
[0199]
　Connection interface 861 is an interface for connecting to the base station apparatus 850 RRH860 (wireless communication interface 863). Connection interface 861 may be a communication module for communicating with the high-speed line.
[0200]
　Wireless communication interface 863 sends and receives radio signals via an antenna 840. Wireless communication interface 863 may typically include an RF circuit 864. RF circuit 864, a mixer may include such as filters and amplifiers, for transmitting and receiving radio signals via an antenna 840. Wireless communication interface 863 includes a plurality of RF circuits 864 as shown in FIG. 25, a plurality of RF circuits 864 may correspond for example to a plurality of antenna elements. Although the wireless communication interface 863 in FIG. 25 shows an example including a plurality of RF circuits 864, a wireless communication interface 863 may comprise a single RF circuit 864.
[0201]
　In eNB830 shown in FIG. 25, one or more components (selection unit 151 and / or the transmission processing unit 153) included in the base station 100 described with reference to FIG. 6, the radio communication interface 855 and / or wireless it may be implemented in the communication interface 863. Alternatively, at least some of these components may be implemented in the controller 851. As an example, ENB830 is part of a wireless communication interface 855 (e.g., BB processor 856) or the whole, and mounted / or module including a controller 851, even if the one or more components in the modules are mounted good. In this case, the module stores (in other words, a program for executing the operation of the one or more components to the processor) processor program for functioning as the one or more components, and the program may be an execution. As another example, a program for causing a processor as the one or more components are installed in ENB830, wireless communication interface 855 (e.g., BB processor 856) also and / or controller 851 executes the program good. As described above, ENB830 as a device comprising the one or more components may be the base station device 850 or the module is provided, a program for causing a processor as the one or more components are provided it may be. The readable recording medium recording the program may be provided.
[0202]
　Further, in eNB830 shown in FIG. 25, for example, wireless communication unit 120 described with reference to FIG. 6, the radio communication interface 863 (e.g., RF circuitry 864) may be implemented in. The antenna unit 110 may be implemented in the antenna 840. The network communication unit 130 may be implemented in the controller 851 and / or network interface 853. The storage unit 140 may be implemented in the memory 852.
[0203]
　<< 7. Conclusion >>
　above with reference to FIGS. 1 to 25 have been described in detail an embodiment of the present disclosure. As explained above, the base station 100 according to this embodiment, as a target to each of the transmission signal sequence in which at least a part of frequency resources or time resources are multiplexed in the resource block that overlaps, a plurality of multiplexed It relates the bit string, the second constellation map, corresponding to the symbol position of the first bit sequence in a first constellation to be applied to the first bit sequence is applied to the second bit sequence. Then, corresponding to the adjacent symbols in the first constellation, each of the second constellation map, a bit string corresponding to the symbol of the end of the adjacent directions are the same. Thus, relates constellation that is applied to the individual bit streams together can realize the Gray mapping, it is possible to realize a gray mapping regard constellation after multiplexing. Therefore, it relates to a signal which is multiplexed with the non-orthogonal resources with minimal occurrence of bit errors in the receiving device, it is possible to further improve the decoding accuracy.
[0204]
　Having described in detail preferred embodiments of the present disclosure with reference to the accompanying drawings, the technical scope of the present disclosure is not limited to such an example. It would be appreciated by those skilled in the art of the present disclosure, within the scope of the technical idea described in the claims, it is clear that to cover various modifications, combinations, for these It is also understood to belong to the technical scope of the present disclosure.
[0205]
　For example, in the above embodiment has been described by way of SPC as an example of the multiplexing / multiple access techniques using non-orthogonal resources, the present technology is not limited to such an example. For example, even in the multiplexing / multiple access technique using an arbitrary non-orthogonal resources such as IDMA (Interleave Division Multiple Access), the technology is applicable.
[0206]
　In the above embodiment has been described mainly taking a case of downlink, the present technology is not limited to such an example. For example, the present techniques may be applied in the uplink, D2D communication or MTC may apply this technology also in communication.
[0207]
　Further, the processing in the present specification has been described with reference to flowcharts and sequence diagrams may not be performed in the order always shown. Some process steps may be executed in parallel. Also may be additional processing steps employed, some of the processing steps may be omitted.
[0208]
　The effects described herein are not limiting be those that only illustrative or exemplary. In other words, the technology according to the present disclosure, together with the above effects, or instead of the above effects, can exhibit the apparent other effects to those skilled in the art from the description herein.
[0209]
　Also within the scope of the present disclosure the following configurations.
(1)
　a first frequency resource, or at least part of the time resource as an object to each of the transmit signal sequences are multiplexed in the resource block that overlaps relates plurality of bit sequences to be multiplexed, which is applied to a first bit sequence the second constellation map, corresponding to the symbol position of the first bit string in the constellation, processing unit to be applied to the second bit string, device comprising a.
(2)
　the corresponding adjacent symbols in the first constellation, each of the second constellation, the bit string corresponding to the symbol of the end of the adjacent directions are the same, according to (1) device.
(3)
　wherein the second constellation each other corresponding to the adjacent symbols in the first constellation is one which is inverted in the adjacent direction, apparatus according to (2).
(4)
　the transmission signal sequence is multiplexed with the power allocation, the (1) to apparatus according to any one of (3).
(5)
　the transmission signal sequence of the first bit sequence, said than the second transmission signal sequence of the bit string is allocated power is high, apparatus according to (4).
(6)
　the first and second constellation shows Gray mapped correspondence between the symbols on the bit stream and the complex plane, the (1) according to any one of - (5).
(7)
　Wherein the processing unit is configured in accordance with the content of the subsequent signal processing than the application of the first and second constellation, it determines whether to apply the second constellation map to the second bit sequence, wherein (1) according to any one of - (6).
(8)
　wherein, when said first bit string transmission signal sequences and both on the same transmission weights of the transmission signal sequence in the second bit string is applied, or the transmit weights to both is not applicable , applying said second constellation to said second bit string device according to (7).
(9)
　the processing unit, in both the transmission signal sequence and transmission signal sequence of the second bit sequence of said first bit sequence, when the same transmission mode is applied, the said second constellation first applied to the second bit string device according to (7) or (8).
(10)
　the processing unit, in both the transmission signal sequence and transmission signal sequence of the second bit sequence of said first bit sequence, if the spatial multiplexing processing or spatial diversity processing of the same spatial multiplexing number applies, wherein the second constellation is applied to the second bit sequence, the (7) according to any one of - (9).
(11)
　wherein the processing unit, depending on the channel used for transmission of the transmission signal sequence and transmission signal sequence of the second bit sequence of said first bit sequence, said second constellation to said second bit string It determines whether applied to the (1) according to any one of - (10).
(12)
　Wherein the processing unit, both of the transmission signal sequence and transmission signal sequence of the second bit sequence of the first bit string, the data channel (Data Channel), a common channel (Shared Channel), or a dedicated channel (Dedicated Channel) If it sent with the second constellation map to apply to the second bit sequence, wherein (1) according to any one of - (11).
(13)
　wherein, when each of the destination of the transmission signal sequence and transmission signal sequence of the second bit sequence of the first bit string is a single device, the said second constellation first It applied to the second bit sequence, wherein (1) according to any one of - (12).
(14)
　wherein, when the transmission signal sequence and the destination of the transmission signal sequence in the second bit string of the first bit sequence are different, applying said second constellation to said second bit string, wherein (1) according to any one of - (13).
(15)
　The number of the transmission signal sequence to be multiplexed is two, wherein (1) according to any one of - (14).
(16)
　the second constellation corresponding further transmission weights applied to each transmission signal sequence of the transmitted signal sequence and the second bit sequence of said first bit sequence, according to (1) apparatus.
(17)
　the second constellation, the first to be applied to the transmission weight is applied to each of the transmission signal sequence of the transmitted signal sequence and the second bit sequence of the first bit sequence and the first bit sequence, an amount corresponding to the symbol position of the first bit sequence in a constellation, in which the reference constellation is rotated, apparatus according to (16).
(18)
　the transmit weights that are applied to each transmission signal sequence of the transmitted signal sequence and the second bit sequence of the first bit sequence are different, according to the above (16) or (17).
(19)
　the first frequency resource, or at least part of the time resource as an object to each of the transmit signal sequences are multiplexed in the resource block that overlaps relates plurality of bit sequences to be multiplexed, which is applied to a first bit sequence the second constellation map, it, applied to the second bit sequence by the processor corresponding to the symbol position of the first bit string in the constellation
method comprising.
(20)
　the computer,
　as a target to each of the transmission signal sequence to be multiplexed at least partially overlap the resource blocks of frequency resources or time resources relates plurality of bit sequences to be multiplexed, is applied to the first bit sequence the first of the at constellation of the first bit sequence and the second constellation corresponding to the symbol position, the processing unit is applied to the second bit string, a program to function as that.
DESCRIPTION OF SYMBOLS
[0210]
　1 system
　100 Base station
　110 Antenna section
　120 Radio communication section
　130 network communication unit
　140 storage unit
　150 processing unit
　151 selecting unit
　153 transmission processing section
　200 terminal

claims

[Claim 1]Targeting each of transmission signal sequences to be multiplexed at least partially overlap the resource blocks of frequency resources or time resources relates plurality of bit sequences to be multiplexed, first constellation which is applied to the first bit sequence wherein the first second constellation corresponding to the symbol position of the bit string, the processing unit is applied to the second bit string, device comprising at.
[Claim 2]
　Wherein corresponding to adjacent symbols in the first constellation map, the each of the second constellation, the bit string corresponding to the symbol of the end of the adjacent directions is the same, according to claim 1.
[Claim 3]
　Wherein said second constellation each other corresponding to the adjacent symbols in the first constellation is one which is inverted in the adjacent direction, The apparatus of claim 2.
[Claim 4]
　The transmission signal sequence is multiplexed with the power allocation apparatus of claim 1.
[Claim 5]
　The transmission signal sequence of the first bit sequence, said than the second transmission signal sequence of the bit string is allocated power is high, according to claim 4.
[Claim 6]
　It said first and second constellation shows Gray mapped correspondence between the symbols on the bit stream and the complex plane, according to claim 1.
[Claim 7]
　Wherein the processing unit is configured in accordance with the content of the subsequent signal processing than the application of the first and second constellation, it determines whether to apply the second constellation map to the second bit sequence, apparatus according to claim 1.
[8.]
　If the processing unit, the first bit sequence transmission signal sequences and both on the same transmission weights of the transmission signal sequence in the second bit string is applied, or that to both not apply transmission weights, the first the second constellation is applied to the second bit sequence, according to claim 7.
[Claim 9]
　Wherein the processing unit in both the transmission signal sequence and transmission signal sequence of the second bit sequence of said first bit sequence, when the same transmission mode is applied, the said second constellation second bit sequence It applied to apparatus of claim 7.
[Claim 10]
　Wherein the processing unit in both the transmission signal sequence and transmission signal sequence of the second bit sequence of said first bit sequence, if the spatial multiplexing processing or spatial diversity processing of the same spatial multiplexing number applies, the second applying the constellation to the second bit sequence, according to claim 7.
[Claim 11]
　Or the processing unit, depending on the channel used for transmission of the transmission signal sequence and transmission signal sequence of the second bit sequence of said first bit sequence, applying the second constellation to said second bit string It determines whether, according to claim 1.
[Claim 12]
　Wherein the processing unit, both of the transmission signal sequence and transmission signal sequence of the second bit sequence of the first bit string, the data channel (Data Channel), a common channel (Shared Channel), or a dedicated channel (Dedicated Channel) when transmitted using, applying said second constellation to said second bit string according to claim 1.
[Claim 13]
　The processing unit, wherein, when each of the destination of the first bit sequence transmission signal sequence and transmission signal sequence of the second bit string is a single device, wherein the second constellation second bit sequence It applied to apparatus of claim 1.
[Claim 14]
　Wherein, when the transmission signal sequence and the destination of the transmission signal sequence in the second bit string of the first bit sequence are different, applying said second constellation to said second bit string, according to claim 1 the apparatus according to.
[Claim 15]
　The number of the transmission signal sequence to be multiplexed is two, according to claim 1.
[Claim 16]
　The second constellation corresponding further transmission weights applied to each transmission signal sequence of the transmitted signal sequence and the second bit sequence of said first bit sequence, according to claim 1.
[Claim 17]
　The second constellation, the transmission signal sequence and the applied transmit weights to each of the transmission signal sequence of the second bit sequence and the first constellation to be applied to the first bit sequence, the first bit sequence the first amount corresponding to the symbol position of the bit string, in which the reference constellation is rotated, according to claim 16 in.
[Claim 18]
　It said transmission weights applied to each transmission signal sequence of the transmitted signal sequence and the second bit sequence of the first bit sequence are different, according to claim 16.
[Claim 19]
　Targeting each of transmission signal sequences to be multiplexed at least partially overlap the resource blocks of frequency resources or time resources relates plurality of bit sequences to be multiplexed, first constellation which is applied to the first bit sequence the second constellation map, corresponding to the symbol position of said first bit sequence, that, applied to the second bit sequence by the processor in the
method comprising.
[Claim 20]
　The computer,
　first part at least of the frequency resources or time resource as an object to each of the transmit signal sequences are multiplexed in the resource block that overlaps relates plurality of bit sequences to be multiplexed, it is applied to the first bit sequence 1 a program for the second constellation corresponding to the symbol position of the first bit string in the constellation, processing unit to be applied to the second bit sequence, to function as a.