Volume 6 Issue 4
Sep.  2017
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Article Navigation >  Journal of Radars  > 2017  >  6(4): 325-331
SONG Jiaqi and TAO Haihong. A fast parameter estimation algorithm for near-field non-circular signals[J]. Journal of Radars, 2020, 9(4): 632–639. doi: 10.12000/JR20053
Citation: Feng Dejun, Wang Junjie, Wang Junqing. Signature Analysis and Discrimination Method of Preceded Frequency-shift False Target[J]. Journal of Radars, 2017, 6(4): 325-331. doi: 10.12000/JR17026
shu

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

DOI: 10.12000/JR17026
  • ①.

    State Key Laboratory of Complex Electromagnetic Environmental Effects on Electronics & Information System, National University of Defense Technology, Changsha 410073, China

  • ②.

    Beijing Institute of Electronic Enginnering, Beijing 100076, China

Funds:  The National Natural Science Foundation of China (61372170)
  • Received Date: 2017-03-14
  • Rev Recd Date: 2017-06-12
  • Publish Date: 2017-08-28
    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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    • References(8)
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