Interrupted-sampling repeater jamming adaptive suppression algorithm based on fractional dictionary

被引：5
|
作者：
Zhang L. [1 ,2 ]
Wang G. [1 ]
Zhang X. [1 ]
Li S. [1 ]
Xin T. [1 ]
机构：
[1] Institute of Information Fusion, Naval Aviation University, Yantai
[2] Unit 94326 of the PLA, Jinan
来源：
Xi Tong Gong Cheng Yu Dian Zi Ji Shu/Systems Engineering and Electronics | 2020年 / 42卷 / 07期
关键词：
Adaptive jamming suppression; Fractional dictionary; Interrupted-sampling repeater jamming;
D O I：
10.3969/j.issn.1001-506X.2020.07.02
中图分类号：
学科分类号：
摘要：
Interrupted-sampling repeater jamming is a new type of jamming, highly threatening the existing radar systems. The typical patterns include interrupted-sampling direct forwarding jamming, interrupted-sampling repetitive forwarding jamming and interrupted-sampling loop forwarding jamming. For the reason of the overlap in time-frequency and fractional domains, it is difficult to separate the target echo from the jamming signal by conventional signal processing tools. To solve the problem, the characteristics of the three kinds of jamming signals in time domain and optimal fractional domain are analyzed, and two kinds of fractional orthogonal dictionaries are constructed, i.e., fractional big-dictionary and union-dictionary. Different jamming suppression methods are adopted under weak or strong jamming backgrounds. An interrupted-sampling repeater jamming adaptive suppression algorithm based on fractional dictionaries is proposed.The simulation results show that the proposed algorithm is suitable in different jamming backgrounds, the recovery signal is more similar to the target echo under the weak jamming background, and the loss of signal to noise ratio (SNR) of the recovery signal is lower under the strong jamming background, compared to other methods. © 2020, Editorial Office of Systems Engineering and Electronics. All right reserved.
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收藏
页码：1439 / 1448
页数：9
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