Polarization discrimination between repeater false-target and radar target  

作　　者：SHI LongFei WANG XueSong XIAO ShunPing 

机构地区：[1]School of Electronics Science and Engineering, National University of Defense Technology, Changsha 410073, China

出　　处：《Science in China(Series F)》2009年第1期149-158,共10页中国科学（F辑英文版）

基　　金：Supported by the New Century Excellent Talents Fund (Grant No. NCET-04-0997);the National Natural Science Foundation of China (GrantNo. 60672033)

摘　　要：High fidelity repeater false-target badly affects a radar system＇s detecting, tracking, and data processing. It is an available approach of confronting false-target for radar that discriminates firstly and then eliminates. Whereas for the technique progress about the repeater false-target jam, it is more and more difficult to discriminate this jam in the time-domain, frequency-domain, or space-domain. The technique using polarization information to discriminate the target and false-target is discussed in this paper, With the difference that false-target signal vector＇s polarization ratio is fixed and target echo signal vector＇s polarization ratio is variational along with radar transmission signal＇s polarization, we transform the discrimination problem to beeline distinguish problem in the 2-dim complex space. The distributing characteristic expression of the false-target discrimination statistic is constructed, with which the discrimination ratio of false-target is analyzed. For the target case, the decomposed model of target scattering matrix and the concept of distinguish quantity are proposed. Then, the discrimination ratio of target can be forecasted according to target distinguish quantity. Thus, the performance of discrimination method has been analyzed integrally. The simulation results demonstrate the method in this paper is effective on the discrimination of target and false-target.High fidelity repeater false-target badly affects a radar system＇s detecting, tracking, and data processing. It is an available approach of confronting false-target for radar that discriminates firstly and then eliminates. Whereas for the technique progress about the repeater false-target jam, it is more and more difficult to discriminate this jam in the time-domain, frequency-domain, or space-domain. The technique using polarization information to discriminate the target and false-target is discussed in this paper, With the difference that false-target signal vector＇s polarization ratio is fixed and target echo signal vector＇s polarization ratio is variational along with radar transmission signal＇s polarization, we transform the discrimination problem to beeline distinguish problem in the 2-dim complex space. The distributing characteristic expression of the false-target discrimination statistic is constructed, with which the discrimination ratio of false-target is analyzed. For the target case, the decomposed model of target scattering matrix and the concept of distinguish quantity are proposed. Then, the discrimination ratio of target can be forecasted according to target distinguish quantity. Thus, the performance of discrimination method has been analyzed integrally. The simulation results demonstrate the method in this paper is effective on the discrimination of target and false-target.

关 键 词：repeater false-target POLARIZATION DISCRIMINATION 

分 类 号：TN95[电子电信—信号与信息处理]