Journal of Xidian University

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2-D Doppler shift-frequency intermittent sampling jamming against SAR

DONG Chunxi;CHANG Xin   

  1. (Ministry of Education Key Lab. of Electronic Information Countermeasure and Simulation Technology, Xidian Univ., Xi'an 710071, China)
  • Received:2016-06-17 Online:2017-04-20 Published:2017-05-26

Abstract:

To generate the false targets in the desired area accurately, a novel two dimensional(2-D) intermittent sampling jamming algorithm against synthetic aperture radar(SAR) is presented. The intercepted radar signals are processed via 2-D intermittent sampling and Doppler shift-frequency and retransmitted to radar. Hence, the false target-lattice emerges in the specified area. The generation mechanism, position and distribution characteristics of false target-lattice are discussed. Meanwhile, the reason for the asymmetric amplitude of the target false-lattice and the modulation factor of energy compensation are presented. The correctness of theoretical analysis and validity of the proposed algorithm are verified through simulation experiments. Compared with conventional methods, the critical requirement of the jammer position can be reduced by the proposed method.

Key words: electronic countermeasure(ECM), synthetic aperture radar(SAR), deceptive jamming, Doppler shift-frequency, intermittent sampling