天波超视距雷达非均匀采样信号频谱重构

doi:10.12305/j.issn.1001-506X.2024.04.12

Abstract

Abstract:

Due to the influence of transient interference and the requirement of simultaneous air and sea detection, under the condition of long coherent integration time, the effective sampling points of the skywave over-the-horizon radar (OTHR) echo signal are often defective and non-uniform, seriously affecting the performance of target detection. To solve this problem, an OTHR spectrum reconstruction method is proposed based on compressed sensing. Firstly, the sparse model of OTHR frequency domain signal is established. Secondly, a fast adaptive complex approximate message passing (FACAMP) algorithm is proposed and its implementation steps are given. Finally, the OTHR spectrum reconfiguration is implemented using FACAMP algorithm and the reconfiguration performance is analyzed. Compared with existing reconstruction algorithms, FACAMP algorithm has the advantages of high reconstruction accuracy, low computational complexity, adaptive parameter adjustment and retaining the Gaussian property of background noise. Both theoretical analysis and simulation experiments verify the effectiveness of the proposed algorithm.

Key words: over-the-horizon radar (OTHR), compressed sensing, spectrum reconstruction, complex approximation messaging passing (FACAMP)

CLC Number:

TN958.93

Zirui CHEN, Alei CHEN, Weijian LIU, Jun YANG, Wenfeng CHEN, Xiaoyan MA. Spectrum reconstruction of nonuniformly sampled signals for over-the-horizon radar[J]. Systems Engineering and Electronics, 2024, 46(4): 1236-1246.

Figures/Tables 12

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References 36

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参数	目标1	目标2	目标3
信噪比/dB	26.517	20.454	29.515
相参积累增益/dB	25.934	26.084	26.551
频率/Hz	1.160	2.116	-0.795

算法	M=256		M=400
算法	运算时间/s	NMSE/dB	运算时间/s	NMSE/dB
OMP	15.810	-25.11	21.430	-29.89
ACAMP	29.640	-23.26	31.510	-33.21
RPCA-SVT	737.900	-16.71	478.300	-30.93
IALM	2 455.000	-11.85	2 421.000	-34.37
FACAMP	0.982	-26.37	1.125	-34.21

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Spectrum reconstruction of nonuniformly sampled signals for over-the-horizon radar

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