A Dense False-target Jamming Main-lobe Blanking Algorithm in Slow-time Dimension

doi:10.12382/bgxb.2022.0866

Abstract

Abstract:

For the reason of the prediction accuracy of radar pulse repetition frequency and beam scanning period, the slow-time distribution of dense false-target jamming (DFJ) in echo is not consistent with that of the target echo. Based on the difference, a DFJ main-lobe blanking (MLB) algorithm in slow-time dimension is proposed. The algorithm has some similarities with the side-lobe blanking (SLB) algorithm, and the difference is gating dimension for the echo. The SLB algorithm is to gate the main channel echo in fast-time by using the auxiliary channel echo. And the MLB algorithm is to gate each range cell echo in slow-time by using the main channel echo within multiple pulse repetition intervals. The simulated results and measured data show that the proposed algorithm can be used to effectively suppress the DFJ from the radar main lobe or side lobe.

Key words: radar, dense false-target jamming, slow-time, main-lobe blanking, measured data

CLC Number:

TN957

ZHANG Liang, DU Qinglei, ZHANG Zhaojian, WANG Yongliang. A Dense False-target Jamming Main-lobe Blanking Algorithm in Slow-time Dimension[J]. Acta Armamentarii, 2024, 45(2): 606-617.

Figures/Tables 18

Fig.1 3D target echoes model

Fig.2 The measured echo data of radar

Fig.3 The unified framework of SLB and MLB

Fig.4 MLB diagram

Fig.5 MLB process

Fig.6 The echoes after PC processing

Fig.7 The echoes after MLB processing

Fig.8 The echoes after coherent integration

Fig.9 The echoes after PC processing

Fig.10 The echoes after MLB processing

Fig.11 The echoes after coherent integration

Fig.12 Influence of SNR on algorithm performance

Fig.13 Influence of JSR on algorithm performance

Fig.14 Influence of PRF error on algorithm performance

Fig.15 Influence of pulse number on algorithm performance

Fig.16 The 1st frame jammed echo

Fig.17 Blanking effect of the 1st frame echo

Fig.18 Algorithm performance verification based on measured echo

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