基于多特征融合的MIMO-OFDM系统单-混信号调制识别算法

doi:10.12305/j.issn.1001-506X.2024.04.35

Abstract

Abstract:

In order to solve the modulation recognition problem of single-mixed signal under multiple-input multiple-output orthogonal frequency division multiplexing (MIMO-OFDM) system in non-cooperative communication, this paper proposes a modulation and recognition method based on multi-feature fusion and decision fusion. Firstly, the joint approximate diagonalization of eigenvalue matrix (JADE) algorithm is used to recovery the transmitted signal from the receiving end. The quartic spectrum, cyclic spectrum and higher-order cumulants of the recovery signal are then extracted as input samples. Secondly, the multi-feature fusion network is used to train the input samples. Finally, the decision fusion strategy is used to obtain the final judgment result according to the output of each branch. Simulation result shows that the proposed method can effectively identify seven signals in MIMO-OFDM system, and the recognition accuracy can reach 99.4% at a signal-to-noise ratio of 10 dB.

Key words: orthogonal frequency division multiplexing single-mixed signal, modulation recognition, quartile spectrum, cyclic spectrum, higher-order cumulants, decision fusion

CLC Number:

TN911.7

Han ZOU, Tianqi ZHANG, Kunran MA, Zongfang YANG. Single-mixed signal modulation and recognition algorithm for MIMO-OFDM system based on multi-feature fusion[J]. Systems Engineering and Electronics, 2024, 46(4): 1456-1465.

Figures/Tables 11

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调制类型	C₂₀	C₂₁	C₄₀	C₄₁	C₄₂	C₆₀	C₆₃
BPSK单	E	E	-2E²	-2E²	-2E²	16E³	16E³
BPSK混	E	E	-E²	-E²	-E²	4E³	4E³
QPSK单	0	E	E²	0	-E²	0	4E³
QPSK混	0	E	-0.5E²	0	-0.5E²	0	E³
8PSK单	0	E	0	0	-E²	0	4E³
16QAM单	0	E	-0.68E²	0	-0.68E²	0	2.08E³
16QAM混	0	E	-0.34E²	0	-0.34E²	0	0.52E³

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Single-mixed signal modulation and recognition algorithm for MIMO-OFDM system based on multi-feature fusion

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