基于相位调制的雷达抗假目标干扰方法

doi:10.12305/j.issn.1001-506X.2021.09.14

Abstract

Abstract:

Aiming at the problem that deception jamming is difficult to distinguish and eliminate, based on the priciple of coherent accumulation, a method of radar anti-false target jamming based on phase modulation (PM) is proposed in this paper. Firstly, the radar transmits the phase modulated pulse train signal. Then, according to the prior information of the phase, the radar compensates the phase of the echo signal when it is received. secondly, the echo signal carries out pulse compression and coherent accumulation. After processing, the range-Doppler (R-D) diagram is used to distinguish the real and false target and extract the Doppler frequency of the real target. Finally, according to the adaptive beamforming theory and the Doppler frequency information of the real target, an adaptive Doppler filter is designed to process the echo pulse train to enhance the real target and form a null at the Doppler frequency of the false target. The problem that the false target is difficult to be eliminated is solved. Simulation results show that the proposed method can effectively distinguish and eliminate false targets in the echo signal.

Key words: radar, anti-interference, false target, phase modulation, coherent accumulation

CLC Number:

TN973

Xiaoge WANG, Hui CHEN, Mengyu NI, Liuliu NI, Bingbing LI. Radar anti-false target jamming method based on phase modulation[J]. Systems Engineering and Electronics, 2021, 43(9): 2476-2483.

Figures/Tables 7

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References 25

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Radar anti-false target jamming method based on phase modulation

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