基于总体最小二乘的外辐射源雷达相消算法

提出一种基于总体最小二乘(TLS)的外辐射源雷达直达波相消算法，该算法首先利用TLS获取直达波的数目和时延，再基于既得的直达波信息构建直达波子空间，最后将回波向该空间投影实现直达波相消。与传统扩展相消算法相比，该算法所构建的直达波子空间阶数低，精确度高，在相关处理时间较短或直达波幅度时变的情况下，仍具有良好的直达波抑制性能。仿真结果证实了算法的有效性。

A direct signal cancellation method based on TLS in passive radar

A direct signals cancellation algorithm for passive radar based on Total Least Square(TLS) is proposed. First, the number and delay of direct signals are obtained by TLS, then the subspace of direct signals is constructed based on the available information of direct signals. Finally, the echo is projected into the sub-space to realize direct signals cancellation. Compared with the traditional extended cancellation algorithm, the direct signal sub-space constructed by this algorithm has low order and high precision, and it still has good clutter suppression performance in the case of short processing time or time-varying amplitude of direct signals. The simulation results verify the effectiveness of the proposed algorithm.