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      Signature Analysis and Discrimination Method of Preceded Frequency-shift False Target

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          Abstract

          Due to the effect of range-Doppler coupling between the time delay and shifted frequency of an LFM waveform, LFM radar is particularly susceptible to shift frequency jamming. A new deceptive jamming method, the Preceded Frequency-shift False Target (PFFT), has a similar signature to real radar targets, which indicates that conventional ECCM, such as leading-edge tracking, could be invalid when countering it. In this paper, the basic principle of PFFT is introduced and its signatures analyzed. Then, a new method for discrimination between a preceded false target generated by Digital Radio Frequency Memory (DRFM) and a radar target is proposed. By comparing the echo arrival time at the radar receiver front end with that estimated after a matched filter, the new method can extract the frequency modulation jamming signature and make a correct judgment. Simulation results are presented to verify the validity of the proposed method.

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          Author and article information

          Journal
          Journal of Radars
          Chinese Academy of Sciences
          01 August 2017
          : 6
          : 4
          : 325-331
          Affiliations
          [1 ] ①(State Key Laboratory of Complex Electromagnetic Environmental Effects on Electronics &Information System, National University of Defense Technology, Changsha 410073, China)
          [2 ] ②(Beijing Institute of Electronic Enginnering, Beijing 100076, China)
          Article
          a0892f6e01db451c8c20ef37b5c926ab
          10.12000/JR17026

          This work is licensed under a Creative Commons Attribution 4.0 Unported License. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/

          Categories
          Technology (General)
          T1-995

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