外辐射源雷达参考通道多径干扰抑制方法

doi:10.3969/j.issn.1001-2400.2018.03.004

摘要/Abstract

摘要：

针对外辐射源雷达系统参考通道中含有多径干扰的问题，提出一种基于改进恒模算法的参考通道多径干扰抑制方法．参考通道中的多径干扰会影响后续的杂波相消和匹配滤波处理，形成虚假目标，影响雷达系统的探测性能．由于多径干扰与直达波信号具有很强的相干性，传统方法很难消除参考通道中的多径干扰成分．新方法根据机会照射源信号的恒模特点，运用改进恒模算法对参考通道进行盲均衡处理，在不需要任何训练序列的情况下，抑制参考信号中的多径干扰．与传统的盲均衡方法相比，新方法具有更好的收敛性，多径干扰抑制效果更好．

关键词: 外辐射源雷达, 盲均衡, 改进恒模算法, 多径干扰抑制

Abstract:

Aiming at the fact that the reference channel includes the multipath interference in the passive bistatic radar, this paper proposes a method to restrain the multipath interference in the reference channel based on the modified constant modulus algorithm. The multipath interference in the reference channel will impact the following interference removing and matched filtering. Because of the strong relativity of the multipath interference with the direct-path signal, the traditional method cannot remove the multipath interference effectively. According to the constant modulus feature of the opportunity illuminator signal, this method utilizes the modified constant modulus algorithm to blind equalize the reference signal and restrain the multipath interference without any training sequence. Compared with the traditional blind equalization method, the method proposed in this paper owns the steadier convergence and the better performance of multipath interference restraint. Simulation prove the availability of the method proposed in this paper.

Key words: passive bistatic radar, blind equalization, modified constant modulus algorithm, multipath interference restraint

郭帅;王俊;陈刚;王珏. 外辐射源雷达参考通道多径干扰抑制方法[J]. 西安电子科技大学学报, 2018, 45(3): 18-23.

GUO Shuai;WANG Jun;CHEN Gang;WANG Jue. Method for multipath interference restraint of the reference channel in passive bistatic radar[J]. Journal of Xidian University, 2018, 45(3): 18-23.

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