Systems Engineering and Electronics ›› 2018, Vol. 40 ›› Issue (1): 45-49.doi: 10.3969/j.issn.1001-506X.2018.01.07

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Reference signal purifying method in passive bistatic radar

CHEN Gang, WANG Jun, WANG Jue, GUO Shuai, SONG Haiting, XING Yushuai   

  1. National Lab of Radar Signal Processing, Xidian University, Xi’an 710071, China
  • Online:2018-01-08 Published:2018-01-08

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Abstract:

In passive bistatic radar, the reference antenna which is used to receive the direct signal is inevitably contaminated by the strong multipath. The information of the target may be influenced by range-Doppler correlation between the target echo and the contaminated reference signal. Aiming at this problem, a reference signal purifying method in passive bistatic radar is proposed. Firstly, the echo signal is projected into the subspace of the reference signal to get the direct signal in the echo channel. Then, the obtained direct signal is used to cancel the interference in the reference channel. Finally, the purified reference signal is used to add the energy of the target echo by range-Doppler correlation. Simulation and theoretical analysis verify the reference signal purifying performance of the proposed method.

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