基于时频域行聚类的抗间歇采样转发干扰方法

doi:10.12305/j.issn.1001-506X.2026.01.11

Abstract

Abstract:

To suppress interrupted sampling repeater jamming, a row clustering method is proposed, which exploits the differences in the time-frequency distributions between the target echo and the jamming signal. First, the short-time Fourier transform is applied to the received signal after matched filtering to obtain its time-frequency representation. Then, clustering is performed along the frequency dimension of the threshold-processed time-frequency data to extract the signal bandwidth information at different time-domain sampling points. Based on the obtained bandwidth characteristics, it is determined whether interrupted sampling repeater jamming is present in a given time-domain sample. Finally, a time-frequency filter is constructed by using the jamming identification results to suppress the interference. Simulation results demonstrate that the signal-to-interference ratio of the radar received signal contaminated by jamming is significantly improved after processing with the proposed method, validating its effectiveness in suppressing interrupted sampling repeater jamming.

Key words: interrupted sampling repeater jamming, short-time Fourier transform, clustering, interference suppression

CLC Number:

TN 974

Qi ZHONG, Shaoren WEI, Zhiyi HE, Jianxin LIU. Anti-interrupted sampling repeater jamming method based on row-clustering in time-frequency domain[J]. Systems Engineering and Electronics, 2026, 48(1): 106-118.

Figures/Tables 16

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参数	数值
发射信号带宽β / MHz	230
发射信号脉宽T / μs	20
接收机采样率f_s / MHz	256
ISRJ采样切片长度τ / μs	1
STFT窗长度L	128

干扰模式	信干比改善系数
直接转发	36.2
重复转发	33.7
前循环转发	27.9
后循环转发	33.6

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Anti-interrupted sampling repeater jamming method based on row-clustering in time-frequency domain

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