基于曼彻斯特编码特性的二次雷达混扰信号分选

摘要

针对二次监视雷达(SSR)应答信号混扰导致解码错误的问题,提出基于模式S应答信号曼彻斯特编码特性的SSR混扰信号分选算法.该算法首先根据曼彻斯特编码特性构建混扰信号的分选模型,将分选问题转化为非对称非正交的联合对角化问题,然后通过一种较为简洁的求解方法,快速求解出分离矩阵,以实现对混扰信号的有效分选,并可准确地估计出应答信号的到达方向.仿真验证表明,该算法在低信噪比情况下保持较好的分选性能,且其性能受应答信号的到达方向和相对延时影响较小.%In order to solve the decoding errors of secondary surveillance radar (SSR) due to the phenomenon of garble,an algorithm based on the manchester encoding property of mode S was proposed for separating the garbled replies.Firstly,a separation model was established on the basis of the manchester encoding property,so separation problem was transformed into a non-symmetrical non-orthogonal joint diagonalization problem.Then,a succinct method was proposed to solve for the separation matrix fast,and the direction of arrival (DOA) was estimated accurately.Numerical simulations show ed that the proposed algorithm maintained good separation performance in the low SNR case,and its performance was less affected by the DOA and relative delay.