High-dimensional OTSM implementation method based on generalized index modulation

Abstract

The invention provides a high-dimensional OTSM implementation method based on generalized index modulation, and relates to the field of wireless communication, and the method comprises the steps: completing the mapping of transmitted digital information through a generalized index modulation technology and a high-dimensional signal constellation diagram, and obtaining an OTSM signal frame of a time-order rate domain through an in-phase orthogonal converter and an OTSM frame generator; a time-order rate domain OTSM signal is converted to a time domain by adopting Walsh-Hadamard transform, and a high-dimensional OTSM transmitter based on generalized index modulation is constructed; the high-dimensional OTSM transmitter is modulated through the generalized index to send digital signals in a wireless channel, and better system performance is achieved with low system implementation complexity. According to the technical scheme, the complexity of system implementation can be effectively reduced, a low system peak-to-average power ratio is achieved, and the energy efficiency of the system and the generalized index modulation reliability are effectively improved through application of the index modulation technology and the high-dimensional signal constellation diagram.

Description

Technical Field

[0001] This application relates to the field of wireless communication, and in particular to a high-dimensional OTSM implementation method based on generalized indexed modulation. Background Technology

[0002] The orthogonal time-sequence multiplexing (OTSM) shown in reference [1] is a multi-carrier transmission scheme that has a significant advantage in resisting multipath and Doppler effects in the field of wireless communication, especially in high mobility communication scenarios. Compared with the orthogonal time-frequency-space (OTFS) technology in reference [2], the OTSM system uses the Walsh-Hadamard transform (WHT) to implement the modulation process instead of the traditional Fourier transform. Since the Hadamard transform matrix is ​​a series of real number additions and subtractions, the OTSM system has lower implementation complexity and the transmitted signal has a lower peak-to-average power ratio. The system reliability is similar to that of OTFS.

[0003] The index modulation technique in reference [3] can effectively improve the energy efficiency, spectral efficiency and reliability of traditional multi-carrier modulation, i.e., orthogonal frequency division multiplexing (OFDM) systems. Reference [4] combines OTSM technology with index modulation technology to propose an index modulation OTSM system, which shows good system performance in underwater acoustic communication. However, references [1] to [4] all use two-dimensional signal constellation diagrams to realize the mapping process, without considering the advantages of higher-dimensional three-dimensional or four-dimensional signal constellation diagrams in terms of minimum Euclidean distance. Reference [5] applies three-dimensional signal constellation diagrams to OFDM systems, which effectively improves the reliability of traditional OFDM systems.

[0004] The existing technology is as follows: Literature [1] T. Thaj, E. Viterbo, and Y. Hong, "Orthogonal time sequencymultiplexing modulation: Analysis and low-complexity receiver design," IEEETrans. Wireless Commun., vol. 20, no. 12, pp. 7842–7855, Dec. 2021. Literature[2] Q. Deng, Y. Ge, and Z. Ding, “A unifying view of OTFS and its many variants,” IEEE Commun. Surv. Tutor., pp. 1–1, Feb. 17 2025, early access, doi=10.1109 / COMST.2025.3542467. Literature[3] E. Basar, U. Aygolu, E. Panay rc , and HV Poor, “Orthogonal frequency division multiplexing with index modulation,” IEEETrans. Signal Process., vol. 61, no. 22, pp. 5536–5549, Nov. 2013 Literature[4] P. Dube, B. Pandey, M. Aggarwal, and SK Yadav, “OTSM-indexmodulation: A novel approach for underwater acoustic systems,” OCEANS 2025Brest, BREST, France, 2025, pp. 1-10. Literature [5] Z. Chen, E. Choi, and S. Kang, ``Closed-form expressions for the symbol error probability of 3-D OFDM,'' IEEE Commun. Lett., vol. 14, no.2, pp. 112_114, Feb. 2010. Summary of the Invention The purpose of this invention is to address the problem that traditional high-dimensional OTSM modulation methods based on Fourier transform cannot effectively reduce the complexity of system implementation and achieve a low system peak-to-average power ratio, and to provide a high-dimensional OTSM implementation method based on generalized index modulation.

[0005] The above-mentioned objective of this application is achieved through the following technical solution: S1: The digital information is mapped using generalized index modulation technology and high-dimensional signal constellation diagram, and then obtained as an OTSM signal frame in the time-series rate domain through an in-phase quadrature converter and an OTSM frame generator. S2: The Walsh-Hadamard transform is used to convert the OTSM signal frame to the time domain, and a high-dimensional OTSM transmitter based on generalized index modulation is constructed. S3: Transmit digital signals in a wireless channel via the high-dimensional OTSM transmitter.

[0006] Optionally, step S1 includes: S11: Considering that each OTSM signal frame in the time-sequence rate domain is a... A two-dimensional matrix, where each column represents the time domain and each row represents the order domain, transmitted in total. One information bit; Will Each information bit is divided into Groups, the number of bits in each group Each subframe is responsible for transmitting a set of Bits, the number of cells contained in each subframe ,in This represents the number of grids in the time domain of a frame of OTSM signal. This represents the number of cells in the sequence rate domain of a frame of OTSM signal; Each group Bits are further divided into Bit and bits, of which ; S12: For the first Subframe Using the Bits, through a generalized index selector, determine the set of active lattice indices. Where D is the dimension of the high-dimensional symbol, 1 ≤ D ≤ 2V; the V cells are expanded into 2V coordinate values ​​for mapping the high-dimensional symbol, i.e., generalized index modulation, and the activated cell index is selected from the expanded 2V cells; S13: Utilizing the above Bits select a D-dimensional symbol from a D-dimensional signal constellation diagram of size Q using a high-dimensional signal mapper. and the coordinate components of the symbol Mapped to by On the specified D activation cells, form a mapped vector of length 2V. Inactive cells are set to 0. S14: Convert the mapped vector using an in-phase quadrature converter. The 2V real data points are converted into V complex numbers to form an OTSM subframe. The conversion formula is:

[0007] in The imaginary unit; S15: Using the OTSM frame generator, generate G OTSM subframes. The data in the file is written into a column by column. A two-dimensional matrix is ​​used to form the time-series rate-domain OTSM signal frame. .

[0008] Optionally, in step S12: The The number of bits is determined by the formula Determined, in the formula This indicates a plateau function, which rounds down. Represents the binomial coefficient; In step S13: the The number of bits is determined by the formula Sure. Optionally, step S2 includes: In the N-point WHT module, the N-point Walsh-Hadamard transform is used to transform the time-series rate domain OTSM signal frame. Convert to time domain signal ; The time-domain signal After vectorization and the addition of a cyclic prefix, the data is sent to the wireless channel for transmission.

[0009] Optionally, the high-dimensional signal constellation diagram is a three-dimensional or four-dimensional signal constellation diagram, and the coordinate components of all symbols in the constellation diagram are non-zero real numbers; the high-dimensional signal constellation diagram adopts a three-dimensional octal constellation diagram, and its symbol coordinate set is a Cartesian product combination of {1, -1}.

[0010] A high-dimensional OTSM system transmitter based on generalized indexed modulation, characterized in that the transmitter comprises: The bit blocker module is used to block the input information bits; A generalized index selector module, connected to the bit blocker module, is used to determine the active lattice index based on a subset of bits; A high-dimensional signal mapper module, connected to the bit blocker module, is used to map high-dimensional symbols based on the remaining bits; The in-phase quadrature converter module, connected to the high-dimensional signal mapper module and the generalized index selector module, is used to convert the real number mapping result into a complex number signal. The OTSM frame generator module is connected to the in-phase quadrature converter module and is used to assemble time-series rate domain signal frames. The N-point WHT module is connected to the OTSM frame generator module and is used to convert the signal to the time domain; The vectorization and cyclic prefix module is connected to the N-point WHT module and is used to prepare for signal transmission.

[0011] A high-dimensional OTSM system receiver based on generalized indexed modulation, characterized in that the receiver comprises: Remove the cyclic prefix and matrixing module to receive time-domain signals and perform preprocessing; The N-point WHT module is used to convert time-domain signals back to the time-series rate domain. The minimum mean square error detection module is used for signal detection; The de-inverting quadrature converter module is used to decompose complex signals into real components; The generalized index detector module is used to detect active grid indexes; A high-dimensional signal demapping module is used to demap high-dimensional symbols; Bit recovery module, used to recover the original information bits.

[0012] An electronic device includes a processor, a memory, a user interface, and a network interface. The memory is used to store instructions, the user interface and the network interface are used to communicate with other devices, and the processor is used to execute the instructions stored in the memory to enable the electronic device to perform a high-dimensional OTSM implementation method based on generalized indexed modulation.

[0013] A computer-readable storage medium storing instructions that, when executed, perform a high-dimensional OTSM implementation method based on generalized index modulation.

[0014] The beneficial effects of the technical solution provided in this application are: 1. This invention uses a high-dimensional signal constellation diagram instead of a traditional two-dimensional signal constellation diagram. Under the conditions of the same constellation diagram size and unchanged transmission power, it has a larger minimum Euclidean distance, which can provide a larger noise margin and improve system reliability.

[0015] 2. Compared with traditional index modulation techniques, this invention uses generalized index modulation techniques to increase the number of index bits, which can improve the spectral efficiency of the system without increasing the transmission power. Moreover, each OTSM subframe only transmits one high-dimensional symbol, resulting in high energy spectral efficiency of the system.

[0016] 3. This invention uses Walsh-Hadamard transform to implement the modulation process, which can effectively reduce the complexity of system implementation compared with the Fourier transform used in traditional OFDM or OTFS, and the transmitted signal has a lower system peak-to-average power ratio, effectively alleviating the system transmitter's need for high-power amplifiers. Attached Figure Description

[0017] The present application will be further described below with reference to the accompanying drawings and embodiments. In the accompanying drawings: Figure 1 This is a step diagram of an embodiment of this application; Figure 2 This is a transmitter structure diagram of the generalized indexed modulation high-dimensional OTSM system in the embodiments of this application; Figure 3 This is a receiver structure diagram of a generalized indexed modulation high-dimensional OTSM system in the embodiments of this application; Figure 4 This is a performance comparison diagram of the generalized indexed modulation high-dimensional OTSM system in the embodiments of this application; Figure 5 This is a schematic diagram of the electronic device structure in the embodiments of this application. Detailed Implementation

[0018] To provide a clearer understanding of the technical features, objectives, and effects of this application, the specific embodiments of this application will now be described in detail with reference to the accompanying drawings.

[0019] The embodiments of this application provide a high-dimensional OTSM implementation method based on generalized index modulation.

[0020] Please refer to Figure 1 , Figure 1 This is a flowchart illustrating the steps of a high-dimensional OTSM implementation method based on generalized index modulation in an embodiment of this application, including: S1: The digital information is mapped using generalized index modulation technology and high-dimensional signal constellation diagram, and then obtained as an OTSM signal frame in the time-series rate domain through an in-phase quadrature converter and an OTSM frame generator. S2: The Walsh-Hadamard transform is used to convert the OTSM signal frame to the time domain, and a high-dimensional OTSM transmitter based on generalized index modulation is constructed. S3: Transmit digital signals in a wireless channel via the high-dimensional OTSM transmitter.

[0021] As one embodiment, the transmitter of the generalized indexed modulation high-dimensional OTSM system includes: a bit blocker module, a generalized index selector module, a high-dimensional signal mapper module, an in-phase quadrature converter module, an OTSM frame generator module, an N-point WHT module, and a vectorization and cyclic prefix module.

[0022] In one specific embodiment of this application, please refer to Figure 3 The receiver of the generalized indexed modulation high-dimensional OTSM system includes: a cyclic prefix removal and matrixing module, an N-point WHT module, a minimum mean square error (MMSE) detection module, a de-inverting quadrature converter module, a generalized indexed detector module, a high-dimensional signal demapping module, and a bit restorer module.

[0023] Step S1 includes: S11: Considering that each OTSM signal frame in the time-sequence rate domain is a... A two-dimensional matrix, where each column represents the time domain and each row represents the order domain, transmitted in total. One information bit; Will Each information bit is divided into Groups, the number of bits in each group Each subframe is responsible for transmitting a set of Bits, the number of cells contained in each subframe ,in This represents the number of grids in the time domain of a frame of OTSM signal. This represents the number of cells in the sequence rate domain of a frame of OTSM signal; Each group Bits are further divided into Bit and bits, of which ; In one specific embodiment of this application, Bit-input generalized index selector and p2-bit-input high-dimensional signal mapper.

[0024] S12: For the first Subframe Using the Bits, through a generalized index selector, determine the set of active lattice indices. Where D is the dimension of the high-dimensional symbol, 1 ≤ D ≤ 2V; the V cells are expanded into 2V coordinate values ​​for mapping the high-dimensional symbol, i.e., generalized index modulation, and the activated cell index is selected from the expanded 2V cells; In one specific embodiment of this application, for any frame of time-series rate domain OTSM signal, the first... Subframe , 1 ≤ g ≤ G, The bits determine the activation state of the lattice used for signal mapping. Unlike traditional indexed modulation methods, which select active lattices from V lattices in a subframe, this method increases the number of index bits by expanding the V lattices to 2V coordinate values ​​for mapping high-dimensional symbols. This is called generalized indexed modulation, where D active lattices are selected from the 2V lattices to map a D-dimensional symbol, i.e., the index bits. In the formula This indicates a plateau function, which rounds down. Represents the binomial coefficient, i.e., from The number of combinations of D, satisfying 1 ≤ D ≤ 2V, is represented by the activated cell index. Inactive cells are 0; S13: Utilizing the above Bits select a D-dimensional symbol from a D-dimensional signal constellation diagram of size Q using a high-dimensional signal mapper. and the coordinate components of the symbol Mapped to by On the specified D activation cells, form a mapped vector of length 2V. Inactive cells are set to 0. In one specific embodiment of this application, the symbol bit The input high-dimensional signal mapper module maps a D-dimensional symbol in an OTSM subframe. In a high-dimensional signal constellation diagram of size Q, a D-dimensional symbol is represented as a column vector. 1 ≤ d ≤ D, T represents the transpose operation, and the coordinate components of all symbols in the high-dimensional signal constellation diagram are non-zero real numbers. The mapped 2V cells are represented as follows: ,in express The high-dimensional symbolic coordinates of the active lattice are set to 0, while those of other lattice cells are set to 0. In one specific embodiment of this application, when D = 3, Q = 8, and V = 2, , Any three-dimensional symbol can be represented as After steps S12 and S13, a three-dimensional signal is mapped by generalized index modulation as shown in Table I:

[0025] S14: Convert the mapped vector using an in-phase quadrature converter. The 2V real data points are converted into V complex numbers to form an OTSM subframe. The conversion formula is:

[0026] in The imaginary unit; S15: Using the OTSM frame generator, generate G OTSM subframes. The data in the file is written into a column by column. A two-dimensional matrix is ​​used to form the time-series rate-domain OTSM signal frame. .

[0027] In one specific embodiment of this application, when M = N = 4, V = 2, and G = 8, the obtained time-series rate-domain OTSM signal frame... A 4×4 two-dimensional matrix, namely:

[0028] In step S12: The The number of bits is determined by the formula Determined, in the formula This indicates a plateau function, which rounds down. Represents the binomial coefficient; In step S13: the The number of bits is determined by the formula Sure.

[0029] Step S2 includes: In the N-point WHT module, the N-point Walsh-Hadamard transform is used to transform the time-series rate domain OTSM signal frame. Convert to time domain signal ; The time-domain signal After vectorization and the addition of a cyclic prefix, the data is sent to the wireless channel for transmission.

[0030] In one specific embodiment of this application, in the N-point WHT module, the N-point Walsh-Hadamard transform is used to transform the two-dimensional time-series rate domain OTSM signal. Convert to time domain signal After two-dimensional matrix vectorization and the addition of a cyclic prefix, the time-domain signal is sent into the channel for transmission. Steps S1 and S2 construct a high-dimensional OTSM transmitter based on generalized index modulation.

[0031] The high-dimensional signal constellation diagram is a three-dimensional or four-dimensional signal constellation diagram, and the coordinate components of all symbols in the constellation diagram are non-zero real numbers; the high-dimensional signal constellation diagram adopts a three-dimensional octal constellation diagram, and its symbol coordinate set is a Cartesian product combination of {1, -1}.

[0032] A high-dimensional OTSM system transmitter based on generalized indexed modulation, characterized in that the transmitter comprises: The bit blocker module is used to block the input information bits; A generalized index selector module, connected to the bit blocker module, is used to determine the active lattice index based on a subset of bits; A high-dimensional signal mapper module, connected to the bit blocker module, is used to map high-dimensional symbols based on the remaining bits; The in-phase quadrature converter module, connected to the high-dimensional signal mapper module and the generalized index selector module, is used to convert the real number mapping result into a complex number signal. The OTSM frame generator module is connected to the in-phase quadrature converter module and is used to assemble time-series rate domain signal frames. The N-point WHT module is connected to the OTSM frame generator module and is used to convert the signal to the time domain; The vectorization and cyclic prefix module is connected to the N-point WHT module and is used to prepare for signal transmission.

[0033] A high-dimensional OTSM system receiver based on generalized index modulation, used to implement the high-dimensional OTSM implementation method based on generalized index modulation as described in any one of claims 1-5, characterized in that the receiver comprises: Remove the cyclic prefix and matrixing module to receive time-domain signals and perform preprocessing; The N-point WHT module is used to convert time-domain signals back to the time-series rate domain. The minimum mean square error detection module is used for signal detection; The de-inverting quadrature converter module is used to decompose complex signals into real components; The generalized index detector module is used to detect active grid indexes; A high-dimensional signal demapping module is used to demap high-dimensional symbols; Bit recovery module, used to recover the original information bits.

[0034] As one embodiment, in the high-dimensional OTSM system based on generalized indexed modulation of the present invention, it is assumed that a three-dimensional octal signal constellation diagram is used to map the transmitted information bits, i.e., Q = 8, D = 3, and the coordinates of all symbols are shown in Table II:

[0035] Other parameters are as follows: M = N = 8, V = 4. The channel environment is wireless double scattering interference, the number of multipath paths is 6, and the maximum multipath delay and maximum Doppler tap are both 4. The transmitter sends 105 OTSM signal frames, which are used by the receiver to calculate the system's bit error rate. Simulation results are as follows. Figure 4 As shown, in order to demonstrate the advantages of the system of the present invention, Figure 4 Simulation results of a traditional indexed modulation two-dimensional OTSM system were also presented. Under identical channel conditions, the traditional indexed modulation method was used, where two out of four cells in each OTSM subframe were selected for activation to map two two-dimensional octal orthogonal amplitude shift keying (8QAM) channels. Both systems achieved a spectral efficiency of 2 bits / second / Hz for fair comparison. Figure 4 Simulation results show that the error transmission efficiency of the system of the present invention is significantly better than that of the traditional indexed modulation two-dimensional OTSM system. Moreover, each OTSM subframe of the present invention transmits only one high-dimensional symbol, while the traditional two-dimensional system transmits two symbols. The energy spectral efficiency of the system of the present invention can be doubled.

[0036] The key technical point of this invention is: (1) The present invention uses a high-dimensional signal constellation diagram instead of the traditional two-dimensional signal constellation diagram. Under the condition that the constellation diagram size is the same and the transmission power is unchanged, it has a larger minimum Euclidean distance, which can provide a larger noise margin and improve system reliability.

[0037] (2) Compared with traditional index modulation technology, this invention uses generalized index modulation technology to increase the number of index bits. Generalized index modulation generates more index bits than traditional index modulation because of the number of extended grids. It can improve the spectral efficiency of the system without increasing the transmission power. Moreover, each OTSM subframe only transmits one high-dimensional symbol, resulting in high energy spectral efficiency of the system.

[0038] (3) The present invention uses Walsh-Hadamard transform to implement the modulation process, which can effectively reduce the complexity of system implementation compared with the Fourier transform used in traditional OFDM or OTFS. This is because Fourier transform requires complex multiplication, while the Walsh-Hadamard transform matrix only contains '+1' and '-1'. Only addition and subtraction operations are required in the modulation process, and the transmitted signal has a lower system peak-to-average power ratio because some signals in the index modulation signal are 0, which effectively meets the system transmitter's requirement for high-power amplifiers.

[0039] This application also discloses an electronic device. (See reference...) Figure 5 , Figure 5 This is a schematic diagram of the structure of an electronic device disclosed in an embodiment of this application. The electronic device 500 may include: at least one processor 501, at least one network interface 504, a user interface 503, a memory 505, and at least one communication bus 502.

[0040] The communication bus 502 is used to enable communication between these components.

[0041] The user interface 503 may include a display screen, and optionally, the user interface 503 may also include a standard wired interface or a wireless interface.

[0042] The network interface 504 may optionally include a standard wired interface or a wireless interface (such as a Wi-Fi interface).

[0043] This application also discloses a computer-readable storage medium storing multiple instructions adapted for loading by a processor to execute the above-described high-dimensional OTSM implementation method based on generalized index modulation.

[0044] The above are merely exemplary embodiments of this disclosure and should not be construed as limiting the scope of this disclosure. Any equivalent changes and modifications made in accordance with the teachings of this disclosure shall still fall within the scope of this disclosure.

[0045] This application is intended to cover any variations, uses, or adaptations of this disclosure that follow the general principles of this disclosure and include common knowledge or customary techniques in the art not described in this disclosure. The specification and embodiments are to be considered exemplary only, and the scope and spirit of this disclosure are defined by the claims.

Claims

1. A method for high-dimensional OTSM implementation based on generalized index modulation, characterized in that, The method comprises the following steps: S1: using generalized index modulation technology and high-dimensional signal constellation to complete the mapping of digital information, and then using an in-phase quadrature converter and an OTSM frame generator to obtain an OTSM signal frame in the time-rate domain; S2: using Walsh-Hadamard transform to convert the OTSM signal frame to the time domain, and constructing a high-dimensional OTSM transmitter based on generalized index modulation; S3: transmitting the digital signal in a wireless channel through the high-dimensional OTSM transmitter.

2. The method of claim 1, wherein the generalized index modulation based high-dimensional OTSM implementation method is characterized by, Step S1 comprises: S11: considering that the OTSM signal frame in time-serial rate domain of each frame is one two-dimensional matrix, each column represents the time domain, each row represents the serial rate domain, and a total of information bits are transmitted; Will Each information bit is divided into Groups, the number of bits in each group Each subframe is responsible for transmitting a set of Bits, the number of cells contained in each subframe ,in This represents the number of grids in the time domain of a frame of OTSM signal. This represents the number of cells in the sequence rate domain of a frame of OTSM signal; The bits of each group are further divided into bits are further divided into bits and bits, wherein ; S12: for the first subframe , using the bits, a set of activated lattice indices is determined by a generalized index selector , where D is the dimension of the high-dimensional symbol, 1 ≤ D ≤ 2V; V lattices are extended to 2V coordinates for mapping the high-dimensional symbol, i.e., generalized index modulation, and the activated lattice indices are selected from the extended 2V lattices; S13: Utilizing the above Bits select a D-dimensional symbol from a D-dimensional signal constellation diagram of size Q using a high-dimensional signal mapper. and the coordinate components of the symbol Mapped to by On the specified D activation cells, form a mapped vector of length 2V. Inactive cells are set to 0. S14: convert the mapped vectors of 2V real data into V complex numbers by an in-phase quadrature converter, to form an OTSM sub-frame The conversion formula is:​ wherein is the imaginary unit; S15: through OTSM frame generator, G the data in the OTSM subframe Of the column is written in a Two-dimensional matrix, form the time-serial domain OTSM signal frame .

3. The method of claim 2, wherein the generalized index modulation based high-dimensional OTSM implementation method is characterized by, In step S12: The number of bits is determined by the formula where represents the floor function, i.e. the integer part of represents the binomial coefficient; In step S13, the The number of bits is determined by the formula .

4. The method of Claim 1, wherein the generalized index modulation based high-dimensional OTSM implementation method is characterized by, Step S2 comprises: In the N-point WHT module, the time-sequence domain OTSM signal frame is converted into a time-domain signal by using N-point Walsh-Hadamard transform conversion into a time-domain signal ; The time domain signal After the vectorization and the addition of the cyclic prefix operation, the signal is sent to the wireless channel for transmission.

5. The method of claim 1, wherein the generalized index modulation based high-dimensional OTSM implementation method is characterized by, The high-dimensional signal constellation is a three-dimensional or four-dimensional signal constellation, and the coordinate components of all symbols in the constellation are non-zero real numbers; the high-dimensional signal constellation adopts a three-dimensional octal constellation, and the symbol coordinate set is the Cartesian product combination of {1, -1}.

6. A generalized index modulation based high-dimensional OTSM system transmitter for implementing the generalized index modulation based high-dimensional OTSM implementation method according to any one of claims 1-5, characterized by The transmitter comprises: a bit grouping module configured to group input information bits; a generalized index selector module connected to the bit grouping module and configured to determine an activated lattice index according to part of the bits; a high-dimensional signal mapper module connected to the bit grouping module and configured to map a high-dimensional symbol according to the remaining bits; an in-phase quadrature converter module connected to the high-dimensional signal mapper module and the generalized index selector module and configured to convert a real number mapping result into a complex signal; an OTSM frame generator module connected to the in-phase quadrature converter module and configured to assemble a time-rate domain signal frame; an N-point WHT module connected to the OTSM frame generator module and configured to convert the signal to the time domain; a vectorization and cyclic prefix module connected to the N-point WHT module and configured to prepare a transmission signal.

7. A generalized index modulation based high-dimensional OTSM system receiver cooperating with the transmitter of claim 6, for implementing the generalized index modulation based high-dimensional OTSM implementation method of any one of claims 1-5, characterized in that, The receiver comprises: a remove cyclic prefix and matrixing module configured to receive a time-domain signal and perform preprocessing; an N-point WHT module configured to convert the time-domain signal back to the time-rate domain; a minimum mean square error detection module configured to perform signal detection; an in-phase quadrature converter module configured to decompose a complex signal into real components; a generalized index detector module configured to detect an activated lattice index; a high-dimensional signal demapper module configured to demap a high-dimensional symbol; a bit restorer module configured to restore original information bits.

8. An electronic device, comprising: The electronic device comprises a processor, a memory, a user interface, and a network interface, the memory is configured to store instructions, the user interface and the network interface are configured to communicate with other devices, and the processor is configured to execute the instructions stored in the memory to enable the electronic device to perform the high-dimensional OTSM implementation method based on generalized index modulation.

9. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores instructions, and when the instructions are executed by a computer, the high-dimensional OTSM implementation method based on generalized index modulation is performed.

Images