Differential spatial modulation method and device based on antenna grouping, and storage medium

Abstract

The invention discloses a differential spatial modulation method and device based on antenna grouping and a storage medium. The method comprises the following steps: respectively activating corresponding symbols in an STBC coding matrix according to two specific antenna activation matrixes, forming a TA-DSM transmission signal, and transmitting the TA-DSM transmission signal. Due to the fact thata transmitting antenna grouping mode is adopted and an Alamouti coding mode is adopted in an STBC matrix; the method is suitable for any even number of transmitting antennas; under the condition thatthe number of transmitting antennas is the same, more antenna activation matrixes are provided, so that higher spectral efficiency is obtained; the method has a never disappeared determinant characteristic without any parameter or matrix optimization. According to the invention, the coding structure has an orthogonal structure, so that a low-complexity decoding algorithm can be adopted, and the decoding complexity is very low. Simulation results show that under different system configurations, compared with other existing differential spatial modulation schemes capable of obtaining the transmit diversity, the invention has better error code performance.

Description

【Technical field】 [0001] The invention belongs to the technical field of transmit diversity transmission in a multi-antenna wireless communication system, and relates to a differential space modulation method, equipment and storage medium based on antenna grouping. 【Background technique】 [0002] The differential spatial modulation (Differential Spatial Modulation, DSM) transmission technology well solves the problem that it is difficult to accurately estimate channel information in the traditional spatial modulation (Spatial Modulation, SM) technology. However, DSM does not obtain transmit diversity and can only rely on receive diversity to combat channel fading. [0003] In order to obtain transmit diversity, the literature proposes a differential transmission mechanism based on space-time block codewords, and gives a design idea for obtaining transmit diversity in the differential transmission model. The literature gives a DSM algorithm in the case of dual antennas. Thro...

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Problems solved by technology

The literature gives a DSM algorithm in the case of dual antennas. Through codeword design, the algorithm can obtain second-order transmit diversity while avoiding channel estimation, but its codeword parameters are many, and it is only applicable to transmit antennas. A system of 2

The literature proposes a Dispersion Matrices based DSM (DM-DSM) scheme, which obtains transmit diversity at the cost of sacrificing spectral efficiency, and the scheme needs to be decoded in the entire codeword space Searching in , can not achieve linear decoding, so it has a high decoding complexity

The literature also proposes a differential spatial modulation (Field Extension for DSM, FE-DSM) scheme based on algebraic field extension that can obtain full diversity. This scheme uses an algebraic field extension method on the basis of DM-DSM To construct a differential space-time code block to obtain a full diversity set, but its spectral efficiency is low due to the reduction in the number of codewords

The literature proposes a differential spatial transmission scheme STBC-DSM based on the Alamouti STBC structure. This scheme has a relatively simple codeword design, can obtain second-order transmit diversity, and supports low-complexity decoding, but its spectral efficiency is low.

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