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基于总体最小二乘的外辐射源雷达直达波相消算法
Passive radar SDR Based on Total Least Square
投稿时间:2019-04-27  修订日期:2019-07-06
中文关键词:外辐射源雷达,无源雷达,直达波相消算法,扩展相消算法
英文关键词:Passive radar , Direct signal Cancellation Algorithm,
基金项目:
作者单位E-mail
杨志峰 空装项目管理中心 1195216929@qq.com 
王海环 中国电子科技集团公司第38研究所  
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中文摘要:
      扩展相消算法(Extended Cancellation Algorithm, ECA)是外辐射源雷达中常用的一种直达波抑制方法,但ECA算法在相关处理时间较短或直达波幅度时变的情况下,不能实现对直达波幅度的准确估计,其性能下降明显。针对上述问题,本文提出一种基于总体最小二乘(Total Least Square, TLS)的直达波相消算法,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ECA相比,该算法所构建的直达波子空间阶数低,精度高,因而在相关处理时间较短时,仍具有良好的直达波抑制性能。仿真结果证实了本文所提算法的有效性。
英文摘要:
      In this paper, 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.
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