Space-frequency block code identification method, device, computer equipment and storage medium

Abstract

This application proposes a space-frequency block code identification method, device, computer equipment and storage medium. Wherein, the method includes: obtaining the respective N×N-dimensional cross-correlation time-frequency feature maps of multiple received signal samples; taking the preset number of N×N-dimensional cross-correlation time-frequency feature maps as a group, and taking the N×N-dimensional cross-correlation time-frequency feature maps in each group The N-dimensional cross-correlation time-frequency feature map is superimposed and averaged; the N×N-dimensional cross-correlation time-frequency feature map obtained after superposition and averaging is spliced ​​in pairs to obtain an N×2N-dimensional cross-correlation time-frequency feature map; based on The newly obtained N×2N-dimensional cross-correlation time-frequency feature map, train the multi-level residual network until the model of the multi-level residual network converges; identify the N×2N-dimensional cross-correlation time-frequency feature map of the received signal, and The N×2N-dimensional cross-correlation time-frequency feature map of the received signal is input to the multi-level residual network that has been trained to obtain the corresponding space-frequency block code category of the received signal. Solve the recognition problem under non-clock synchronization and low signal-to-noise ratio.

Description

technical field [0001] The present application relates to the field of wireless communication technology, and in particular to a space-frequency block code identification method, device, computer equipment and storage medium based on a cross-correlation feature map and a multi-level residual network. Background technique [0002] The MIMO (Multiple-Input Multiple-Output) system is a key technology in the next-generation wireless communication system. Among them, the identification of space-time block code (Space-time block code, short: STBC) and space-frequency block code (Space Frequency Block Code, short: SFBC) has received more and more attention. Still Orthogonal Frequency Division Multiplexing (Orthogonal Frequency Division Multiplexing, OFDM for short), more and more researches on spatial code recognition technology. There are two ways to combine spatial coding and OFDM technology. One is to perform space-time block coding on OFDM signals, which is called STBC-OFDM si...

AI Technical Summary

Problems solved by technology

[0004] For this reason, the first object of the present application is to propose a method for identifying space-frequency block codes, so as to realize identifying the spatial multiplexing signal (SM-OFDM) and the AL signal (AL-OFDM) in the SFBC-OFDM signal, It can solve the recognition problem under non-clock synchronization and low signal-to-noise ratio

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