双基地噪声雷达中直达波干扰抑制技术研究  

Research on Direct Signal Suppression Technique for Bistatic Noise Radar

作　　者：鲁振兴[1] 尹伟 洪永彬 LU Zhenxing;YIN Wei;HONG Yongbin(The 54th Research Institute of CETC,Shijiazhuang 050081,China)

机构地区：[1]中国电子科技集团公司第五十四研究所

出　　处：《无线电工程》2020年第3期232-237,共6页Radio Engineering

摘　　要：针对双基地噪声雷达直达波和近距离强杂波严重影响远距离微弱目标检测的问题,对直达波和杂波干扰抑制技术进行了研究。分析了LMS自适应时域干扰抑制算法在双基地噪声雷达中的直达波干扰抑制性能。针对雷达参考信号时域强相关情况下算法收敛速度过慢的问题,提出了基于格型预测的联合过程估计对消算法,通过对参考信号进行去相关处理,降低LMS类型算法输入相关矩阵的特征值散布,提高了收敛速度。通过仿真对干扰抑制算法进行了收敛过程分析和性能验证。To reduce the effect of direct signal and strong clutter at close range on the detection of weak target echo in bistatic noise radar,the suppression of direct signal and strong clutter is studied.Firstly,the performance of LMS adaptive interference suppression method is analyzed for the suppression of direct signal in bistatic noise radar.Then,a joint process estimation cancellation method based on lattice filtering is proposed to solve the slow convergence problem in the situation of strong correlation input.The lattice filtering can decorrelate the reference signal to reduce the eigenvalue spread of input correlation matrix,increasing the convergence rate.Finally,the convergence and suppression performance of the proposed method is validated by simulation.

关 键 词：双基地噪声雷达 直达波干扰抑制 LMS算法 联合过程估计 

分 类 号：TN957.54[电子电信—信号与信息处理]