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A Low Complexity Differential Spatial Modulation Detection Algorithm

A spatial modulation and low-complexity technology, applied in the field of communication, can solve high-complexity problems, achieve the effects of reducing complexity, improving spectrum utilization, and increasing the number of information bits

Active Publication Date: 2018-09-07
浙江知多多网络科技有限公司
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Problems solved by technology

Differential Maximum Likelihood Detection Algorithm (DSM-ML) was proposed as the detection algorithm with the best performance, but its complexity is very high due to its traversal search method

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  • A Low Complexity Differential Spatial Modulation Detection Algorithm
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  • A Low Complexity Differential Spatial Modulation Detection Algorithm

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Embodiment Construction

[0031] A low-complexity differential space modulation detection algorithm adopted in the present invention is as follows: firstly, at the transmitting end of the differential space modulation system, the bit filling scheme and the transmission bit calculation formula are used to construct a symbol matrix, and the signal is sent after the differential change, and at the receiving end Obtain the received signal (the received signal is a matrix of Nr×Nt), and then based on the formula structure of the differential maximum likelihood detection algorithm, adopt a column-by-column detection search method for the receiving matrix, perform signal judgment column by column, and obtain the modulation symbol and transmission The serial number of the antenna is finally inversely mapped to information bits.

[0032] Further, the transmitting end of the differential spatial modulation system is set as an Nt×Nt-dimensional symbol matrix, and the calculation formula for the possible number of ...

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Abstract

The invention provides an LC-DSM algorithm (low-complexity differential detection algorithm). Firstly, a symbolic matrix is constructed at the transmitting end of a differential spatial modulation system by applying a bit filling scheme and a transmission bit calculation formula, and a receiving signal is obtained at the receiving end through differential transformation and transmitting. Then a search mode of detection by column is adopted on a receiving matrix based on the equation structure of a differential maximum likelihood detection algorithm to perform signal decision column by column so that a transmitting symbol and the sequence number of a transmitting antenna are obtained. Finally information bits are obtained through inverse mapping according to the corresponding relation of the bit and the transmitting symbol and the bit and the sequence number of the transmitting antenna. The method is obtained by combination of the low-complexity detection algorithm under spatial modulation and the equation structure formed by the maximum likelihood detection algorithm under the differential spatial modulation system. The research indicates that complexity is greatly reduced relative to the differential maximum likelihood detection algorithm by using the LC-DSM algorithm under the premise of guaranteeing no loss of algorithm performance.

Description

technical field [0001] The invention relates to the field of communication technology, in particular to a transmission method and a signal detection method of a transmission terminal of a wireless communication line system, in particular to a low-complexity detection algorithm for a space modulation system. Background technique [0002] A multiple input multiple output (MIMO: multiple input multiple output) technology can improve the capacity and spectrum utilization of a wireless communication system by using multiple transmitting and receiving antennas. However, due to the limitation of its system structure, the interference between transmission channels and the strict synchronization of multi-antenna transmission have become the two main reasons restricting its development. Under such circumstances, spatial modulation (SM: spatial Modulation) is proposed as a new type of MIMO transmission mode. In each transmission time slot of the system, only one transmission antenna is...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L25/03H04B7/0413H04L1/00
Inventor 金小萍文思杰
Owner 浙江知多多网络科技有限公司
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