Description:TECHNICAL FIELD
[0001] The present disclosure relates to the field of digital signal modulation technique. More particularly, the present disclosure relates to a system and method for enabling Orthogonal Time Sequency Multiplexing Modulation (OTSM).

BACKGROUND
[0002] Background description includes information that may be useful in understanding the present invention. It is not an admission that any of the information provided herein is prior art or relevant to the presently claimed invention, or that any publication specifically or implicitly referenced is prior art.
[0003] Orthogonal Time Sequency Multiplexing Modulation (OTSM) is a digital signal modulation technique used in telecommunications and wireless communication systems. An existing patent united states Patent No. US 9444514B2 titled “OTFS METHODS OF DATA CHANNEL CHARACTERIZATION AND USES THEREOF” considers channel estimation for OTFS with ideal pulse shaping waveform over channels with integer Doppler shifts only, i.e., when the channel Doppler taps are aligned to integer delay Doppler grid under no hardware impairments. The channel estimation in presence of In-phase and quadrature imbalance (IQI) is not considered The cited document utilizes Commercial off the Shelf (COTS) Satellite TV based low noise receiver fine-tuned for RF down conversion to IF in this application. 8 COTS Quad DSP Cards are used for IF digital down conversion to base band. Overall a total of 64 elements used for receive beam forming.
[0004] Another existing patent United State Patent 10,999,026 titled "OTFS BASIS ALLOCATION METHOD IN WIRELESS COMMUNICATION SYSTEM USING OTFS TRANSMISSION SYSTEM" describes method for receiving orthogonal time , frequency and space (OFTS) basis allocation information by an user equipment in a wireless communication system using an OTFS transmission scheme includes receiving control information including information on an OTFS basis size N from a base station and receiving data on OTFS bases of predetermined size index according to pre-defined rule in NxN OTFS transform matrix, wherein in the NxN OTFS transform matrix, a row index represents a cyclic frequency shift index , and a column index represents a cyclic time shift index, wherein the indexing according to the pre-defined rule includes indexing the OTFS bases of the predetermined size in an order such that the cyclic frequency shift and the cyclic time shift in the NxN OTFS transform matrix are maximized..
[0005] Therefore, there is a need in the art to provide a joint estimation of IQ imbalance and channel parameters for OTSM systems and method for time varying wireless channels.

OBJECTS OF THE PRESENT DISCLOSURE
[0006] Some of the objects of the present disclosure, which at least one embodiment herein satisfies are as listed herein below.
[0007] It is an object of the present disclosure to divide a high-speed data stream into multiple lower-speed sub-streams, which are then transmitted in parallel using a specific sequence of pulses.
[0008] It is an object of the present disclosure allows for efficient use of bandwidth, as multiple sub-streams can be transmitted simultaneously without interfering with each other.
[0009] It is an object of the present disclosure provides orthogonality of the pulse sequences used in OTSM makes it resistant to interference from other signals, which can improve the reliability and quality of communication systems.
[0010] It is an object of the present disclosure increases data rate where OTSM allows for multiple sub-streams to be transmitted simultaneously without interfering with each other. This increases the capacity and data rate of communication systems.
[0011] It is an object of the present disclosure to increase the capacity and efficiency of communication systems, and it has a number of advantages over other modulation techniques.

SUMMARY
[0012] The present disclosure relates to the field of digital signal modulation technique. More particularly, the present disclosure relates to a system and method for enabling Orthogonal Time Sequence Multiplexing Modulation (OTSM).
[0013] An aspect of the present disclosure pertains to a system for enabling a Orthogonal Time Sequency Multiplexing Modulation (OTSM). The OTSM can be configured to enable joint estimation and compensation of transmission and reception of an in-phase and quadrature phase (IQ) imbalance, and estimate channel parameters in a delay time domain (DT). Further, the OSTM comprises a transmitter and a receiver. The transmitter can be configured to convert an information symbol matrix (XDS) in a delay-sequency (DS) domain to an information symbol matrix (XDT) in a delay-time (DT) domain by using a Inverse Walsh Hadamard transform (IWHT). The receiver can be configured to receive at least one signal along with IQ imbalances Kr1 and Kr2 to obtain the received symbol vector in the DS domain
[0014] In an aspect, the OSTM system can be configured to transform the information symbols placed in the delay-sequency (DS) domain into the delay-time (DT) domain by using a Inverse Walsh Hadamard Transform (IWHT).
[0015] In an aspect, the receiver can be configured to remove a cyclic prefixed from the received symbols and enable matrix YDS vectorization with row-column interleaving a perfect shuffle matrix operation, and applying a N-point Walsh Hadamard transform (WHT) to obtain the received symbol vector in the DS domain.
[0016] In an aspect, a MFGS detector performs error detection and the jointly compensated system at significant imbalances of TX and RX.
[0017] An aspect of the present disclosure pertains to a enabling Orthogonal Time Sequency Multiplexing Modulation (OTSM). The method can comprise the step of enabling, by a OTSM system, a joint estimation and compensation of transmission and reception of an in-phase and quadrature phase (IQ) imbalance, and estimate channel parameters in a delay time domain (DT). The method can comprise the step of converting, by a transmitter, an information symbol matrix (XDS) in a delay-sequency (DS) domain to an information symbol matrix (XDT) in a delay-time (DT) domain by using a Inverse Walsh Hadamard transform (IWHT). Further, the method can comprise the step of receiving, by a receiver, at least one signal along with IQ imbalances Kr1 and Kr2 to obtain the received symbol vector in the DS domain.
[0018] In an aspect, the method can be configured to transforming the information symbols placed in the delay-sequency (DS) domain into the delay-time (DT) domain by using a Inverse Walsh Hadamard Transform (IWHT).
[0019] In an aspect, the receiver can be configured to remove a cyclic prefixed from the received symbols and enable matrix YDS vectorization with row-column interleaving a perfect shuffle matrix operation, and applying a N-point Walsh Hadamard transform (WHT) to obtain the received symbol vector in the DS domain.
[0020] In an aspect, a MFGS detector performs error detection and the jointly compensated system at significant imbalances of TX and RX.

BRIEF DESCRIPTION OF THE DRAWINGS
[0021] The accompanying drawings are included to provide a further understanding of the present disclosure, and are incorporated in and constitute a part of this specification. The drawings illustrate exemplary embodiments of the present disclosure and, together with the description, serve to explain the principles of the present disclosure.
[0022] The diagrams are for illustration only, which thus is not a limitation of the present disclosure, and wherein:
[0023] FIG. 1 illustrates block diagram of OTSM system, in accordance with an exemplary embodiment of the present disclosure.
[0024] FIG. 2 illustrates the proposed OTSM system with impairments at the transmitter, in accordance with an exemplary embodiment of the present disclosure.
[0025] FIG. 3 illustrates the proposed OTSM system with impairments at the Receiver, in accordance with an exemplary embodiment of the present disclosure.

DETAILED DESCRIPTION
[0026] The following is a detailed description of embodiments of the disclosure depicted in the accompanying drawings. The embodiments are in such detail as to clearly communicate the disclosure. However, the amount of detail offered is not intended to limit the anticipated variations of embodiments; on the contrary, the intention is to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the present disclosure as defined by the appended claims.
[0027] Various terms as used herein are shown below. To the extent a term used in a claim is not defined below, it should be given the broadest definition persons in the pertinent art have given that term as reflected in printed publications and issued patents at the time of filing.
[0028] In some embodiments, the numerical parameters set forth in the written description and attached claims are approximations that can vary depending upon the desired properties sought to be obtained by a particular embodiment. In some embodiments, the numerical parameters should be construed in light of the number of reported significant digits and by applying ordinary rounding techniques. Notwithstanding that the numerical ranges and parameters setting forth the broad scope of some embodiments of the invention are approximations, the numerical values set forth in the specific examples are reported as precisely as practicable. The numerical values presented in some embodiments of the invention may contain certain errors necessarily resulting from the standard deviation found in their respective testing measurements.
[0029] As used in the description herein and throughout the claims that follow, the meaning of “a,” “an,” and “the” includes plural reference unless the context clearly dictates otherwise. Also, as used in the description herein, the meaning of “in” includes “in” and “on” unless the context clearly dictates otherwise.
[0030] The recitation of ranges of values herein is merely intended to serve as a shorthand method of referring individually to each separate value falling within the range. Unless otherwise indicated herein, each individual value is incorporated into the specification as if it were individually recited herein. All methods described herein can be performed in any suitable order unless otherwise indicated herein or otherwise clearly contradicted by context. The use of any and all examples, or exemplary language (e.g. “such as”) provided with respect to certain embodiments herein is intended merely to better illuminate the invention and does not pose a limitation on the scope of the invention otherwise claimed. No language in the specification should be construed as indicating any non-claimed element essential to the practice of the invention.
[0031] Groupings of alternative elements or embodiments of the invention disclosed herein are not to be construed as limitations. Each group member can be referred to and claimed individually or in any combination with other members of the group or other elements found herein. One or more members of a group can be included in, or deleted from, a group for reasons of convenience and/or patentability. When any such inclusion or deletion occurs, the specification is herein deemed to contain the group as modified thus fulfilling the written description of all groups used in the appended claims.
[0032] The present disclosure relates to the field of digital signal modulation technique. More particularly, the present disclosure relates to a system and method for enabling Orthogonal Time Sequence Multiplexing Modulation (OTSM).
[0033] An aspect of the present disclosure pertains to a system for enabling a Orthogonal Time Sequency Multiplexing Modulation (OTSM). The OTSM can be configured to enable joint estimation and compensation of transmission and reception of an in-phase and quadrature phase (IQ) imbalance, and estimate channel parameters in a delay time domain (DT). Further, the OSTM comprises a transmitter and a receiver. The transmitter can be configured to convert an information symbol matrix (XDS) in a delay-sequency (DS) domain to an information symbol matrix (XDT) in a delay-time (DT) domain by using a Inverse Walsh Hadamard transform (IWHT). The receiver can be configured to receive at least one signal along with IQ imbalances Kr1 and Kr2 to obtain the received symbol vector in the DS domain
[0034] In an aspect, the OSTM system can be configured to transform the information symbols placed in the delay-sequency (DS) domain into the delay-time (DT) domain by using a Inverse Walsh Hadamard Transform (IWHT).
[0035] In an aspect, the receiver can be configured to remove a cyclic prefixed from the received symbols and enable matrix YDS vectorization with row-column interleaving a perfect shuffle matrix operation, and applying a N-point Walsh Hadamard transform (WHT) to obtain the received symbol vector in the DS domain.
[0036] In an aspect, a MFGS detector performs error detection and the jointly compensated system at significant imbalances of TX and RX.
[0037] An aspect of the present disclosure pertains to a enabling Orthogonal Time Sequency Multiplexing Modulation (OTSM). The method can comprise the step of enabling, by a OTSM system, a joint estimation and compensation of transmission and reception of an in-phase and quadrature phase (IQ) imbalance, and estimate channel parameters in a delay time domain (DT). The method can comprise the step of converting, by a transmitter, an information symbol matrix (XDS) in a delay-sequency (DS) domain to an information symbol matrix (XDT) in a delay-time (DT) domain by using a Inverse Walsh Hadamard transform (IWHT). Further, the method can comprise the step of receiving, by a receiver, at least one signal along with IQ imbalances Kr1 and Kr2 to obtain the received symbol vector in the DS domain.
[0038] In an aspect, the method can be configured to transforming the information symbols placed in the delay-sequency (DS) domain into the delay-time (DT) domain by using a Inverse Walsh Hadamard Transform (IWHT).
[0039] In an aspect, the receiver can be configured to remove a cyclic prefixed from the received symbols and enable matrix YDS vectorization with row-column interleaving a perfect shuffle matrix operation, and applying a N-point Walsh Hadamard transform (WHT) to obtain the received symbol vector in the DS domain.
[0040] In an aspect, a MFGS detector performs error detection and the jointly compensated system at significant imbalances of TX and RX.
[0041] FIG. 1 illustrates block diagram of OTSM system, in accordance with an exemplary embodiment of the present disclosure.
[0042] As illustrated in FIG. 1, the OTSM system 102 involves dividing a high-speed data stream into multiple lower-speed sub-streams, which are then transmitted in parallel using a specific sequence of pulses. Each sub-stream is assigned a unique sequence of pulses that are orthogonal to the other sub-streams, meaning that they do not interfere with each other. Further, the orthogonality of the pulse sequences allows for efficient use of bandwidth, as multiple sub-streams can be transmitted simultaneously without interfering with each other. Thus, the OTSM is a useful technique for increasing the capacity and data rate of communication systems. The OTSM is often used in combination with other modulation techniques, such as Quadrature Amplitude Modulation (QAM), to further improve the efficiency and data rate of communication systems.
[0043] In an exemplary embodiment, the transmission and reception of "Orthogonal Time Sequency Multiplexing Modulation" (OTSM) occurs at a transmitter 200 and receiver 300, respectively
[0044] In an embodiment, the transmitter 200 enables data encoding where the high-speed data stream is encoded using a specific coding scheme Further, the encoded data stream is divided into multiple lower-speed sub-streams. Furthermore, each sub-stream is assigned a unique sequence of pulses that are orthogonal to the other sub-streams. Finally, the pulses are modulated onto a carrier signal, and the resulting modulated signal is transmitted over the communication channel.
[0045] In an embodiment, the receiver 300 enables demodulation where the modulated signal is received and demodulated to recover the pulse sequences that were modulated onto the carrier signal. Each pulse sequence is detected and separated from the other sequences. The detected pulse sequences are decoded using the same coding scheme that was used during encoding: The decoded sub-streams are combined to reconstruct the original high-speed data stream.
[0046] In an embodiment, the training sequence design of the system 102 satisfies the identity and nullity conditions simultaneously. Zadoff-chu sequences which have Constant Amplitude Zero Auto Correlation (CAZAC) in time domain and frequency domain satisfy these conditions for large value of M for low value of M PN sequences are preferred.
[0047] In an embodiment, the training sequence placement of the system 102 includes the training matrix and information symbols are placed in the DS domain. The zeros are inserted to eliminate interference between data and training symbols and to remove interblock interference (IBI) and total overhead length.
[0048] In an embodiment, the channel estimation in delay time of the system 102 includes Moore-Penrose pseudo inverse, to estimate least square and eliminate the interference caused by it. The channel coefficients are linearly interpolated for each delay tap.
[0049] In an embodiment, the training power allocation of the system 102 includes the total transmit power is constant whether training symbols embedded or not. The total transmit power is sum of data and training symbols power.
[0050] FIG. 2 illustrates the proposed OTSM system with impairments at the transmitter, in accordance with an exemplary embodiment of the present disclosure.
[0051] As illustrated in FIG. 2, the transmitter 200 includes a the information symbol matrix in delay-sequency (DS) domain is given to the N-point Inverse Walsh Hadamard transform (IWHT) 202 which convert (XDS) the DS domain to (XDT) delay-time (DT) domain. The matrix XDT is vectorized with row-column interleaving perfect shuffle matrix operation 204, where the transmitted symbols can be appended cyclic prefixed in time domain. The transmitted signal with IQ imbalance is modelled using 206 asymmetrical TX IQ imbalance coefficients Kt1 and Kt2. Further, the antenna unit 208 can be configured to enable transmission and reception of Radio Frequency (RF) signals over the air. The discrete time varying channel model 210 at the base-band with P reflecting paths with fractional Delay and fractional Doppler.
[0052] FIG. 3 illustrates the proposed OTSM system with impairments at the Receiver, in accordance with an exemplary embodiment of the present disclosure.
[0053] As illustrated in FIG. 3, the receiver 300 can be configured to receive 302 signal with IQ imbalances can be modelled using RX IQ imbalance using coefficients Kr1 and Kr2 at 304. The cyclic prefixed removed from received symbols and matrix YDS is vectorized 306 with row-column interleaving perfect shuffle matrix operation. By taking N-point Walsh Hadamard transform (WHT) 308 is obtained, and the received symbol vector in the DS domain.
[0054] While the foregoing describes various embodiments of the invention, other and further embodiments of the invention may be devised without departing from the basic scope thereof. The scope of the invention is determined by the claims that follow. The invention is not limited to the described embodiments, versions or examples, which are included to enable a person having ordinary skill in the art to make and use the invention when combined with information and knowledge available to the person having ordinary skill in the art.

ADVANTAGS OF THE INVENTION
[0055] The proposed invention provides a mechanism for dividing high-speed data stream into multiple lower-speed sub-streams, which are then transmitted in parallel using a specific sequence of pulses.
[0056] The proposed invention provides a mechanism for efficient use of bandwidth, as multiple sub-streams can be transmitted simultaneously without interfering with each other.
[0057] The proposed invention provides a mechanism for orthogonality of the pulse sequences used in OTSM makes it resistant to interference from other signals, which can improve the reliability and quality of communication systems.
[0058] The proposed invention provides a mechanism for increases data rate where OTSM allows for multiple sub-streams to be transmitted simultaneously without interfering with each other. This increases the capacity and data rate of communication systems.
[0059] The proposed invention provides a mechanism for increase the capacity and efficiency of communication systems, and it has a number of advantages over other modulation techniques.

, Claims:1. An system (100) for enabling a Orthogonal Time Sequence Multiplexing Modulation (OTSM) can be configured to:
enable joint estimation and compensation of transmission (TX) and reception (RX) of an in-phase and quadrature phase (IQ) imbalance, and estimate channel parameters in a delay time domain (DT), the system (100) for OTSM comprises:
a transmitter (200) configured to convert an information symbol matrix (XDS) in a delay-sequency (DS) domain to an information symbol matrix (XDT) in a delay-time domain by using a Inverse Walsh Hadamard transform (IWHT); and
a receiver (300) configured to receive at least one signal along with IQ imbalances Kr1 and Kr2 to obtain the received symbol vector in the DS domain.
2. The system (100) as claimed in claim 1, wherein system (100) for OTSM is configured to:
transforms the information symbols placed in the delay-sequency (DS) domain into the delay-time (DT) domain by using a Inverse Walsh Hadamard Transform (IWHT).
3. The system (100) as claimed in claim 1, wherein the receiver (300) is configured to:
remove a cyclic prefixed from the received symbols and enable matrix YDS vectorization with row-column interleaving a perfect shuffle matrix operation, and applying a N-point Walsh Hadamard transform (WHT) to obtain the received symbol vector in the DS domain.
4. The system (100) as claimed in claim 1, wherein a MFGS detector performs error detection and the jointly compensated system at significant imbalances of TX and RX.

5. A method for enabling Orthogonal Time Sequency Multiplexing Modulation (OTSM), the method comprises:
enabling, by a system (100) for OTSM, a joint estimation and compensation of transmission (TX) and reception (RX) of an in-phase and quadrature phase (IQ) imbalance, and estimate channel parameters in a delay time domain (DT);
converting, by a transmitter (200), an information symbol matrix (XDS) in a delay-sequency (DS) domain to an information symbol matrix (XDT) in a delay-time (DT) domain by using a Inverse Walsh Hadamard transform (IWHT); and
receiving, by a receiver (300), at least one signal along with IQ imbalances Kr1 and Kr2 to obtain the received symbol vector in the DS domain.
6. The method as claimed in claim 5, wherein the method is configured to:
transforming the information symbols placed in the delay-sequency (DS) domain into the delay-time (DT) domain by using a Inverse Walsh Hadamard Transform (IWHT).
7. The method as claimed in claim 5, wherein the receiver (300) is configured to:
removing, by a cyclic prefixed from the received symbols and enable matrix YDS vectorization with row-column interleaving a perfect shuffle matrix operation, and applying a N-point Walsh Hadamard transform (WHT) to obtain the received symbol vector in the DS domain.
8. The method as claimed in claim 5, wherein a Matched Filtered Gauss-Seidel (MFGS) detector performs error detection and the jointly compensated system at significant imbalances of TX and RX.