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Electronics 2019, 8(1), 46; https://doi.org/10.3390/electronics8010046

Improved ISRJ-Based Radar Target Echo Cancellation Using Frequency Shifting Modulation

State Key Laboratory of Complex Electromagnetic Environment Effects on Electronics and Information System, National University of Defense Technology, Changsha 410073, China
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Received: 10 December 2018 / Revised: 25 December 2018 / Accepted: 28 December 2018 / Published: 1 January 2019
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Abstract

Target echo cancellation is an ingenious method that protects the target of interest (TOI) from being detected by radar. Interrupted-sampling repeater jamming (ISRJ) is a novel deception jamming method for linear frequency modulation (LFM) radar countermeasures, which has been applied in target echo cancellation recently. Compared with the conventional cancellation method, not only can the target echo be successfully cancelled at radar receiver, but a train of false targets is also produced and forms deception jamming by applying the ISRJ technique. In this paper, an improved radar target echo cancellation method based on ISRJ is proposed that utilizes an extra frequency shifting modulation on the intercepted LFM radar signal. The jammer power is more efficiently utilized by the proposed method. Moreover, more flexible multi-false-target deception jamming can be obtained by adjusting the interrupted sampling frequency. The real target remains effectively protected by the false preceding target in the presence of amplitude mismatch of cancellation signal and target echo. Numerical simulations and measured data experiments are conducted to demonstrate the effectiveness of the proposed method. View Full-Text
Keywords: radar echo cancellation; frequency shifting modulation; interrupted sampling; radar jamming; deception jamming radar echo cancellation; frequency shifting modulation; interrupted sampling; radar jamming; deception jamming
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
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Wu, Q.; Zhao, F.; Wang, J.; Liu, X.; Xiao, S. Improved ISRJ-Based Radar Target Echo Cancellation Using Frequency Shifting Modulation. Electronics 2019, 8, 46.

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