Transmitter and receiver and corresponding methods

description

The invention relates to a transmitter and a receiver and corresponding methods for transmitting and receiving signals.

In many data transmission systems for signal detection and parameter estimation pilot sequences (called zen-Synchronisationssequen also training sequences or) inserted into the data to be transmitted streams. This can be either the transmission of a continuous data stream manual close, in the pilot sequences are interspersed at intervals, as well as to a packet-oriented transmission in which usually each packet (also called telegram) contains exactly a pilot sequence. The pilot sequence is also called preamble or midamble if it is at the beginning or in the middle of the package. but a pilot sequence can also two within the package in the form of or be distributed more sub-sequences.

In Telemetnesystemen, sensor networks and applications under the heading of Internet of Things (loT) usually takes an asynchronous packet transmission with long Sendepau-sen place between the packages.

In asynchronous packet transmission the transmitter and receiver are not synchronized, the receiver that the transmission time-slots of the individual data packets does not know. In order not to miss package, he must check during the entire time ready to receive his reception signal continu-nuieriieh the presence of a packet and the sen time position with a certain accuracy estimate.

To make matters worse, the actual carrier frequency of the transmitted signal to differ materially from the nominal frequency and can change over time. The center frequency of the receive filter can deviate from the nominal frequency. From the perspective of the receiver is the frequency difference between the carrier frequency of the transmitted signal and the center frequency of the receive filter - hereinafter referred to as frequency offset - prevail. then also an estimate of the instantaneous frequency deviation and coherent detection method and a phase estimation is required for data detection.

A total of two subjects are from the receiver consecutively to edit:

1 . Detection: detection of a packet and at least a rough estimate, if necessary, of its temporal position also considers the spectral position.

2. Synchronization consisting of

• Time synchronization: estimate the exact timing of the package,

• Frequency Synchronization: estimation and correction of the frequency deviation and '

• phase synchronization: estimation of the phase after frequency correction.

By the use of an asynchronous system it is necessary to perform a detection of messages with the aid of a pilot sequence. The receiver must search continuously in its reception signal whether a message has been transmitted from a sensor node. The recipient's decision whether the received signal caused by noise or by a transmission signal is short-termed telegram detection or detection only. For this purpose ( "pilot symbol" called.) Is to be transmitted data typically Piiotsequenz (in English literature often called "markers") having clearly defined pilot symbols in the transmission prefixed.

The invention has the object to provide a transmitter and a receiver used for a data communication and pilot sequences which facilitate the detection or processing of pilot sequences.

The invention achieves the object by a transmitter.

The transmitter is designed such to emit signals each having a plurality of pilot sequence symbols having Pilo! Sequence. The transmitter includes a signal generator. The signal generator, the pilot sequence starting from one at least one ready Basissequenz- symbol having base sequence. Specifically, the signal generator, the pilot sequence symbols starting from the (R) times consecutively repeated base sequence symbol ready, where R is a natural number greater than or equal to two.

In one aspect, the signal generator, the pilot sequence from a plurality of base sequence of symbols having base sequence prepared.

The transmitter thereby transmits signals, each having a pilot sequence. The pilot sequences have more than one pilot sequence symbols. In this case, provides a signal generator, the respective pilot sequence, starting from a base sequence provided that at least one base sequence symbol and symbols basic sequence has-multiple in one embodiment. Providing in this case comprises, for example resorting to stored pilot sequences or generating the pilot sequence based on the base sequence. Providing, for example, also includes generating the symbols of the signal to be emitted in response to a mapping, z. B. MSK.

The base sequence symbol is repeated in the pilot sequence (Rl) times in succession, so that the base sequence symbol R-fold is present. Accordingly, the base sequence of symbols are respectively (R) times in succession wiederhoit in the pilot sequence, so that each base sequence symbol R-fold is present. A corollary is that it is sufficient if it is detected on the receiving side for detecting only every R-th symbol and evaluated. Thus, the desired length of the pilot sequence results overall as the number of the pilot sequence symbols and at the same time, the costs are reduced for a - at least one first - evaluation of the received signal. So therefore are optimized pilot sequences for a computationally optimized detection using a sub-sampling at the receiver side.

The sequence of each R-duplicate base sequence symbols (in some embodiments, may still other symbols) are mapped in a configuration having a modulation alphabet. Here, in one embodiment, a digital modulation method is applied. In a variant of this example, the binary phase shift keying (PSK binary, BPSK). Thus, the binary 1 to +1 and the binary 0 is displayed, for example, to -1 (mapped). For example, a base sequence is therefore given by the symbols 01 10, the sequence of symbols 001 1 1 100 results in a simple repetition consequences for a BPSK symbols [-1, -1, +1, +1, + 1, +1, -1, -1],

In one embodiment, the signal generator generates at least one symbol block of the (R-1) comprises at least one base sequence symbol and repeats in the pilot sequence.

In one aspect, the signal generator, the Piiotsequenz starting from a plurality of base sequence of symbols having the base sequence and provides ready, each having a base sequence symbol and its How-in of the pilot sequence symbol blocks

include repetitions. Further, the signal generator, the pilot sequence such prepared that the symbol blocks of the base sequence of symbols in a sequence of the base sequence of symbols immediately follow each other within the base sequence. In this embodiment, the R times the base sequence of symbols in the pilot sequence as a symbol-blocks are referred to that occur in the order in which the pilot sequence that the base sequence symbols have in the base sequence. Furthermore, the symbol blocks follow each other immediately.

In one embodiment it is provided that the pilot sequence L comprises pilot sequence symbols, where L is a natural number. It is then a number of the base sequence of symbols is equal to a quotient of L divided by R. If the pilot sequence thus a length of eight symbols and is repeated every base sequence icon once, that is R = 2, four base sequence symbols are required.

In one embodiment, each base sequence symbol is repeated once, so that R = 2.

One embodiment is that the base sequence is designed such that a correlation of the pilot sequence having a carrier formed from the pilot sequence transmission signal a narrow main peak as possible and / or as small as possible secondary maxima. This refers to the choice of base sequence. More precisely, the embodiment describes the correlation of the actual pilot sequence with the (continuous-time) from their formed modulated signal which is emitted by the transmitter.

In one embodiment the base sequence is provided that in the case where the pilot sequence comprises eight pilot sequence symbols having one of the following forms: 0010 or 1 101 or 0100 or 101. 1 The ones and zeros are each the binary basic sequence bits. The sequences given herein and in the following are based on that basis, in an embodiment in particular, the Minimum Shift Keying (MSK) as the type of picture (or the mapping) of the binary symbols to the real signal to be generated sections. Alternatively or additionally, the sequences given here and below for other linear or quasi-linear modulation schemes such as MSK or GMSK apply.

The bits described above are converted by a respective modulation or a mapping to the actual symbols.

One embodiment is that in the event that the pilot sequence comprises twelve pilot sequence symbols, the base sequence comprises one of the following or derived by reversing the bit order forms: 000101, 00101 1, 001101, 010001, 1 1 1010 1 10100, 10010 or 101 1 1 10. In this case, the zeros and ones are in each case the binary basic sequence bits. When choosing the basic sequence is well known that a bit inversion and a reversal of the bit order correlation properties do not change a series.

In one embodiment it is provided that the signal generator providing at least a block of symbols in the pilot sequence having a base sequence symbol and its (R-1) comprising repetitions, wherein the base sequence of symbols are provided with phase factors. This embodiment applies both to the case that the base sequence, only one base sequence symbol has, as well as to the configuration that the base sequence has a plurality of base sequence symbols. In the aforementioned embodiment, a base sequence symbol thus appears R-times in succession in the pilot sequence, but provided with phase factors.

In one embodiment it is provided that the signal generator provides the pilot sequence out-basis having a plurality of base sequence of symbols based sequence. In this case, the signal generator prepared in the pilot sequence symbol blocks, each comprising a base sequence symbol and its (R-1) repetitions, and therefore each of R symbols are long. Here, the signal generator provides the base sequence symbols such phase factors that the phase factors of the respective i-th occurrence of a base sequence symbol in a symbol block for all the blocks of symbols are equal. Here, i is a natural number between 1 and R and designates the position of a base sequence symbol in the corresponding symbol block. Here, the i-th occurrence with i = 1 is the zeroth repetition. Further details will become apparent from the following description. In one embodiment, it is especially provided that the repeated symbols are provided with different phase factors.

In one embodiment, the phase factors are components of a modulation alphabet. A modulation alphabet serves in general for conversion of digital symbols for the analog processing or in this case the signal transmission.

Thus, the respective first base sequence symbol has in all the symbol blocks to the same phase factor and the respective second - standing so at the second location - has base sequence symbol in each symbol blocks each having the same phase factor, which in one embodiment of the phase factor of each first base sequence -Symbols different. Taking all basic sequence symbols the increment of the same respective phase factors is thus given by the repetition of the basic sequence symbols.

One embodiment is that the phase factors from a product of a p with < r j designated phase and the imaginary number as an exponent result in the natural exponential function, wherein the phase φ r is between 0 and 2π bzw.0 ° and 360 °.

One embodiment is that in the event that the pilot sequence comprises eight pilot sequence symbols, the pilot sequence comprises one of the following or derived by reversing the bit order forms: 01011001, 10100110, 10011010.01100101, 00001100, 11110011, 00110000, 11001111 ,. The ones and zeros are each the binary pilot sequence bits. The pilot sequences, the symbols corresponding to the given order will be sent out.

In one embodiment it is provided that in the case where the pilot sequence twelve pilot sequence symbols having the pilot sequence comprises one of the following or derived by reversing the bit order forms:

000000110011 or 111111001100 or 110011000000 or 001100111111 or 010101100110 or 101010011001 or 011001101010 or 100110010101 or 000011001111 or 111100110000 or 010110011010 or 101001100101 or 000011110011 or 111100001100 or 110011110000 or 001100001111 or 010110100110 or 101001011001 or 011001011010 or 100110100101 or 001100000011 or 110011111100 or 110000001100 or 001111110011 or 011001010110 or 100110101001 or 011010100110 or 100,101,011,001th

The ones and zeros are each the binary pilot sequence bits. In one embodiment, the aforementioned pilot sequences on the MSK mapping are related.

One embodiment provides that the signal generator provides the pilot sequence such that the pilot sequence comprises at least one supplementary symbol. In this case, the signal generator in the pilot sequence at least one symbol block prepared which comprises a base sequence symbol and its (R-1) repetitions. In this case, the signal generator, the pilot sequence such prepared that the at least one supplementary symbol precedes or follows the block of symbols.

In one embodiment it is provided that the signal generator such provides the pilot sequence that the pilot sequence comprises at least one supplementary symbol. In this case, the signal generator prepared in the pilot sequence symbol blocks, each comprising a base sequence symbol and its repetitions. Further, the signal ge-erator the pilot sequence such prepared that the at least one supplementary symbol precedes or follows the symbol blocks. In one embodiment, the symbol blocks contiguous, so be between the symbol blocks any supplement symbols or only follow or precede the addition of symbols.

In one embodiment it is provided that the signal generator, the pilot sequence such prepared that the pilot sequence has at least two supplementary symbols. In this case, the signal generator, the pilot sequence such prepared that at least one supplementary symbol of the at least two supplementary symbols preceding the symbol blocks and at least one arideres Ergänzungssyrnbol said at least two supplementary symbols subsequent to the symbol blocks. The pilot sequences thus consist of a core of the R-fold existing base sequence symbol is formed, and a kind of grip of the supplement symbols.

One embodiment is that the at least one supplementary symbol or the at least two supplementary symbols is designed in such a way or are that a correlation of the pilot sequence having a carrier formed from the pilot sequence transmission signal narrowest possible main peak and / or as small as possible In addition to maxi ma. The choice of supplement symbol or symbols based supplement so that the resulting pilot sequence possible to recognize good and / or synchronize.

In one embodiment it is provided that in the case where the pilot sequence comprises eight pilot sequence symbols, the base sequence having the shape 001 and two comple-zungsbits are present, which together have one of the following forms; 01 or 10 or 00 or 1. 1 Here, the zeros and ones each binary basic sequence bits and the binary Ergänzungsbits. The Ergänzungsbits are thereby as the other already mentioned bits converted by a corresponding mapping in the supplementary symbols. The same applies to the base sequence bits.

A the above embodiments, supplemental or alternative embodiment consists da-rin that the pilot sequence comprises one of the following or derived by reversing the bit order forms:

00001101 or 11110010 or 10110000 or 01001111 or 01011000 or 10100111 or 00011010 or 11100101 or 01000011 or 10111100 or 11000010 or 00111101 or 00010110 or 11101001 or 01101000 or 10010111 or 10000110 or 01111001 or 01100001 or 10011110 or 00101100 or 11010011 or 00110100 or 11001011th

The ones and zeros are each the binary pilot sequence bits. In an extended-staltung the aforementioned pilot sequences on the MSK mapping are related.

In one embodiment it is provided that in the case where the pilot sequence comprises twelve pilot sequence symbols, the base sequence having the shape of 00010 and two Ergänzungsbits present, which together have one of the following forms: 01 or 10 or 00 or 11. Here, the zeros and ones each binary basic sequence bits and the binary Ergänzungsbits.

A the above embodiments, supplemental or alternative embodiment is that the pilot sequence comprises one of the following or from henfolge Bitrei-by reversing the shapes obtained:

100000011001 or 011111100110 or 100110000001 or 011001111110 or

001010110011 or 110101001100 or 110011010100 or 001100101011 or

000000110010 or 111111001101 or 010011000000 or 101100111111 or 010101100111 or 101010011000 or 111001101010 or 000110010101 or

010000001100 or 101111110011 or 001100000010 or 110011111101 or 000101011001 or 111010100110 or 100110101000 or 011,001,010,111th

The ones and zeros are each the binary pilot sequence bits. In an extended-staltung the aforementioned pilot sequences on the MSK mapping are related.

Furthermore, the invention achieves the object by a method for transmitting signals.

The process comprises at least the following steps:

• the signals comprising pilot sequence are transmitted, each having a plurality of pilot sequence symbols, and

• the pilot sequences having base sequence are provided in such a way, starting from a least one symbol Basissequenz- that the Basissequenz- symbols at least once repeated pilot sequence symbols constituting row.

The above embodiments of the transmitter can be realized by steps from the corresponding embodiments of the method, so is omitted here a repetition of executions.

The invention also achieves the object by a receiver.

The receiver is so configured to receive at least one signal and to evaluate a pilot sequence with respect to. For the evaluation of the receiver falls back into ei-ner design on stored or generally known reference sequences.

In one embodiment, corresponds to - the receiver - known reference sequence of pilot sequence used by the transmitter for the transmission, and this reference sequence is used by the receiver for the evaluation of those pilot sequence that the received Signa! having.

The following embodiments each relate to specific variants of the evaluation or the signal conditioning for the evaluation. Thus described particular adjuvants or auxiliary components of the receiver, the view outward of the evaluation in to serve the pilot sequence.
claims

1. Sender (1),

wherein the transmitter (1) is designed in such a way, signals each to emit a pilot sequence comprising a plurality of pilot sequence symbols,

wherein the transmitter (1) comprises a signal generator (2)

wherein the signal generator (2) is designed in such a way, starting to provide the pilot sequence by a base sequence having a plurality of base sequence of symbols,

wherein the signal generator (2) pilot sequence symbols the fold consecutively repeated base sequence symbol provides, starting from the (R-1), and wherein R is a natural number greater than or equal to two,

wherein the base sequence is designed such that a correlation of the pilot sequence with a pilot sequence formed from the transmit signal a narrow main peak as possible and / or as small as possible In addition to maxima.

2. Transmitter (1) according to claim 1,

wherein the signal generator (2) produced in the pilot sequence symbol blocks, each having a base sequence symbo! and its (R-1) include repetition, and

wherein the signal generator (2) generates the pilot sequence such that the symbol blocks of the base sequence of symbols follow immediately in an order of Basissequenz- symbols within the base sequence to each other.

3. transmitter (1) according to claim 1 or 2,

wherein the base sequence comprises one of the following forms in the case that the pilot sequence comprises eight pilot sequence symbols:

0010 or 1101 or 0100 or 1011, and

wherein the zeros and ones are in each case the binary basic sequence bits.

4. transmitter (1) according to claim 1 or 2,

wherein the base sequence comprises one of the following or derived by reversing the bit order forms in the case that the pilot sequence comprises twelve pilot sequence symbols:

000101, 001011, 001101, 010001, 111010, 110100, 110010 or 101110, and

wherein the zeros and ones are in each case the binary basic sequence bits.

5. Sender (1) according to one of claims 1 to 4,

wherein the signal generator (2) providing in the pilot sequence symbol blocks, each having a base sequence symbol and its (R-1) include repetition, and

wherein the signal generator (2) symbols basic sequence provides the thus with phase factors that the phase factors of the respective i-th occurrence of a base sequence symbol in a symbol block for all the blocks of symbols are equal, and wherein i is a natural number between 1 and r.

6. transmitter (1) according to claim 5, wherein the phase factors are components of a modulation alphabet.

7. transmitter (1) according to claim 5 or 6,

wherein the pilot sequence comprises one of the following or derived by reversing the Bitrethenfolge forms in the case that the pilot sequence comprises eight pilot sequence symbols:

01011001, 10100110, 10011010, 01100101, 00001100, 11110011, 00110000, 11001111, and

wherein the zeros and ones are in each case the binary pilot sequence bits.

8. transmitter (1) according to claim 5 or 6,

wherein the pilot sequence comprises one of the following or derived by reversing the bit order forms in the case that the pilot sequence comprises twelve pilot sequence symbols:

000000110011 or 111111001100 or 110011000000 or 001100111111 or 010101100110 or 101010011001 or 011001101010 or 100110010101 or 000011001111 or 111100110000 or 010110011010 or 101001100101 or 000011110011 or 111100001100 or 110011110000 or 001100001111 or 010110100110 or 101001011001 or 011001011010 or 100110100101 or 001100000011 or 110011111100 or 110000001100 or 001111110011 or 011001010110 or 100110101001 or 011010100110 or 100101011001, and

wherein the zeros and ones are in each case the binary pilot sequence bits.

9. transmitter (1) according to any one of claims 1 to 8,

wherein the signal generator (2) provides the pilot sequence such that the pilot sequence comprises at least one supplementary symbol,

wherein the signal generator (2) providing in the pilot sequence symbol blocks, each having a base sequence symbol and its (R-1) include repetition, and

wherein the signal generator (2) provides the pilot sequence such that precedes the symbol blocks at least one supplementary symbol or follows.

10. Sender (1) according to claim 9,

wherein the signal generator (2) generates the pilot sequence such that the pilot sequence has at least two supplementary symbols, and

wherein the signal generator (2) provides the pilot sequence such that at least one supplementary symbol of the at least two supplementary symbols preceding the symbol blocks and at least one other supplementary symbol of the at least two supplementary symbols subsequent to the symbol blocks.

11. Sender (1) according to claim 9 or 10,

said at least one supplementary symbol or the at least two supplementary symbols is designed in such a way or are that a correlation of the pilot sequence having a carrier formed from the transmit signal Piiotsequenz a narrow main peak as possible and / or as small as possible secondary maxima.

12. Sender (1) according to any one of claims 9 to 11,

wherein the base sequence having the shape of 001 in the case that the pilot sequence comprises eight pilot sequence symbols and two Ergänzungsbits present, which together have one of the following forms:

01 or 10 or 00 or 11, and

wherein the zeros and ones each binary basic sequence bits and the complement binary symbols.

13. Sender (1) according to claim 12,

wherein the pilot sequence comprises one of the following or derived by reversing the bit order forms:

00001101 or 11110010 or 10110000 or 01001111 or 01011000 or 10100111 or 00011010 or 11100101 or 01000011 or 10111100 or 11000010 or 00111101 or 00010110 or 11101001 or 01101000 or 10010111 or 10000110 or 01111001 or 01100001 or 10011110 or 00101100 or 11010011 or 00110100 or 11001011, and

wherein the zeros and ones are in each case the binary pilot sequence bits.

14. Sender (1) according to any one of claims 9 to 11,

wherein the base sequence having the shape of 00010 in the event that the pilot sequence comprising twelve symbols and pilot sequence are two Ergänzungsbits present, which together have one of the following forms:

01 or 10 or 00 or 11, and

wherein the zeros and ones each binary basic sequence bits and the binary Ergänzungsbits are.

15. Sender (1) according to claim 14,

wherein the pilot sequence comprises one of the following or derived by reversing the bit order forms:

100000011001 or 011111100110 or 100110000001 or 011001111110 or 001010110011 or 110101001100 or 11001 1010100 or 001100101011 or 000000110010 or 111111001101 or 010011000000 or 101100111111 or 010101100111 or 101010011000 or 111001101010 or 000110010101 or 010000001100 or 101111110011 or 001100000010 or 110011111101 or 000101011001 or 111010100110 or 100110101000 or 011001010111, and

wherein the zeros and ones are in each case the binary pilot sequence bits.

16. A method for transmitting signals,

wherein the signals each, are transmitted a pilot sequence comprising a plurality of symbols Pilotsequenz-,

wherein said pilot sequence is starting, provided from a base sequence having a plurality of base sequence of symbols,

wherein said pilot sequence symbols-are provided starting from the (R) times consecutively repeated base sequence symbol, wherein R is a natural number greater than or equal to two, and

wherein the base sequence is designed such that a correlation of the pilot sequence with a pilot sequence formed from the transmit signal a narrow main peak as possible and / or as small as possible In addition to maxima.

17. The receiver (10, 20, 30),

wherein the receiver (10, 20, 30) is designed in such a manner at least to receive a signal from a transmitter according to one of claims 1 to 16 and evaluated with respect to a pilot sequence,

wherein the receiver (10) comprises a signal evaluation device (11)

wherein the signal evaluation device (11) is designed in such a way to subject the received signal to a first evaluation,

wherein the signal evaluation device (11) at least partially scans the received signal at the first evaluation at a first sampling and / or only every i th sample used for processing of samples of the received signal being greater i is a natural number or equal to two,

wherein the signal evaluation device (11) generates at the first evaluation, an evaluation result with respect to the pilot sequence,

wherein the signal evaluation device (11) subjects in dependence on the evaluation result, the received signal of a second evaluation,

wherein the signal evaluation device (11) at least partially scans the received signal at the second evaluation at a second rate and / or used only every k-th sample for further processing of samples of the received signal, and

wherein the second sampling rate is greater than the first sampling rate, and / or wherein k is a natural number smaller than i.

18. Receiver (10) according to claim 17,

wherein the signal evaluation device (11) works out a reduced Piiotsequenz at the first evaluation of the received signal, which consists of a number of symbols, the number of symbols of the reduced Piiotsequenz is equal to a number of symbols of a base sequence, and

wherein the signal evaluation device (11) for the generation of the evaluation compares the worked out reduced pilot sequence with stored base sequences.

19. The receiver (10) according to claim 17 or 18, wherein the signal evaluation device (11) determined in the processing of samples of correlation with stored base sequences.

20. A method of receiving at least one signal, which is emitted by a method according to claim 16,

wherein the received signal is evaluated in terms of a pilot sequence.

wherein the received signal is subjected to a first evaluation in which

(I) sampling the received signal with a first sampling rate, at least partially and / or only every i-th sample used for further processing of samples of the received signal, wherein i is a natural number greater than or equal to two, and

(Ii) an evaluation result is generated with respect to the pilot sequence, and

wherein a second evaluation is subjected to a function of the evaluation result, the received signal, wherein

is a natural number, the received signal having a second sampling rate is at least partially scanned and / or only every k-th sample used for further processing of samples of the received signal, wherein the second sampling rate k is greater than the first sampling rate and / or smaller than i ,

21. The method according to claim 20,

wherein the pilot sequence of the signal is divided into at least two sections which overlap partially,

wherein the at least two partial regions are correlated with portions of the reference sequences, and in each case a partial result is generated, and

wherein a total result is generated with respect to the pilot sequence of the partial results.

22. The method of claim 20 or 21,

wherein for at least two sub-packets of the pilot sequence or pilot sequences for at least two partial each separately a Fourier transform is determined,

wherein the determined incoherent Fourier transform and adds an addition result is generated, and

wherein on the basis of the addition result and on the basis of reference sequences evaluation result for the pilot sequence is generated.

23. System (50) for signal transmission, said system (50) at least one transmitter (1) according to any one of claims 1 to 15 and at least one receiver (10, 20, 30) according to any one of claims 17 to 19th

24. Computer program having a program code for performing the method according to one of claims 16 or 20 to 22nd

25. The receiver (10, 20, 30),

wherein the receiver (10, 20, 30) is designed in such a manner at least to receive a signal and to evaluate with respect to a pilot sequence,

wherein the receiver (10) comprises a signal evaluation device (11)

wherein the signal evaluation device (11) is designed in such a way to subject the received signal to a first evaluation,

wherein the signal evaluation device (11) at least partially scans the received signal at the first evaluation at a first sampling and / or only every i th sample used for processing of samples of the received signal being greater i is a natural number or equal to two,

wherein the signal evaluation device (11) generates at the first evaluation, an evaluation result with respect to the pilot sequence,

wherein the signal evaluation device (11) subjects in dependence on the evaluation result, the received signal of a second evaluation,

wherein the signal evaluation device (11) at least partially scans the received signal at the second evaluation at a second rate and / or used only every k-th sample for further processing of samples of the received signal, and

wherein the second sampling rate is greater than the first sampling rate, and / or wherein k is a natural number smaller than i.

26. Receiver (10) according to claim 25,

wherein the signal evaluation device (11) works out a reduced pilot sequence at the first evaluation of the received signal, which consists of a number of symbols, the number of symbols of the reduced pilot sequence is equal to a number of symbols of a base sequence, and

wherein the signal evaluation device (11) for the generation of the evaluation compares the worked out reduced pilot sequence with stored base sequences.

27. Receiver (10) according to claim 25 or 26, wherein the signal evaluation device (11) determined in the processing of samples of correlation with stored base sequences.

28. A method of receiving at least one signal,

wherein the received signal is evaluated in terms of a pilot sequence,

wherein the received Signa! a first evaluation is subjected, in the

(I) sampling the received signal with a first sampling rate, at least partially and / or only every i-th sample used for further processing of samples of the received signal, wherein i is a natural number greater than or equal to two, and

(Ii) an evaluation result is generated with respect to the pilot sequence, and

wherein a second evaluation is subjected to a function of the evaluation result, the received signal, wherein

is a natural number, the received signal having a second sampling rate is at least partially scanned and / or only every k-th sample used for further processing of samples of the received signal, wherein the second sampling rate k is greater than the first sampling rate and / or smaller than i ,

29. The method according to claim 28,

wherein the pilot sequence of the signal is divided into at least two sections which overlap partially,

wherein the at least two partial regions are correlated with portions of the reference sequences, and in each case a partial result is generated, and

wherein a total result is generated with respect to the pilot sequence of the partial results.

30. The method according to claim 28 or 29,

wherein for at least two sub-packets of the Piiotsequenz or for at least two Teiipiiotsequenzen each separately a Fourier transform is determined,

wherein the determined incoherent Fourier transform and adds an addition result is generated, and

wherein on the basis of the addition result and on the basis of reference sequences evaluation result for the pilot sequence is generated.

31. Computer program having a program code for performing the method according to one of claims 28 to 30th