一种基于协方差矩阵重构和EMP的宽带波束形成算法

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英文篇名：Broadband beamforming algorithm based on covariance matrix reconstruction and EMP 作者：毛睿达 ; 李骥阳 ; 罗明 英文作者：Mao Ruida;Li Jiyang;Luo Ming;Key Laboratory of Electronic Information Countermeasure & Simulation Technology for Ministry of Education,Xidian University; 关键词：宽带波束形成 ; 主瓣干扰 ; 特征投影预处理 ; 协方差矩阵重构 英文关键词：broadband beamforming;;mainlobe interference;;EMP;;covariance matrix reconstruction 中文刊名：JSYJ 英文刊名：Application Research of Computers 机构：西安电子科技大学电子信息攻防对抗与仿真技术教育部重点实验室; 出版日期：2019-04-15 出版单位：计算机应用研究 年：2019 期：v.36;No.330 基金：西安电子科技大学基本科研业务费资助项目(JB160221) 语种：中文; 页：JSYJ201904054 页数：3 CN：04 ISSN：51-1196/TP 分类号：243-245

摘要

在宽带波束形成中,若干扰信号从主瓣方向进入,会引起主瓣畸变、旁瓣电平抬高,从而使波束性能严重恶化。为了解决波束形成中的这些问题,研究了一种基于协方差矩阵重构和特征投影预处理(EMP)的宽带波束形成算法。该算法首先通过EMP算法求取阻塞矩阵,对接收信号进行干扰相消预处理阻塞掉主瓣干扰;然后通过相干信号子空间(CSM)方法、协方差矩阵重构求取合理的协方差矩阵;最后进行波束形成。在主瓣干扰、旁瓣干扰同时存在的情况下,该算法能够自适应地阻塞主瓣干扰、抑制旁瓣干扰,解决了存在主瓣干扰情况下宽带波束形成的波形畸变问题。计算机仿真验证了该算法的有效性。
        Mainlobe interference can cause the distortion of the mainlobe and the increase of the sidelobe level in broadband beamforming. This paper developed a broadband beamforming algorithm based on EMP( eigen-projection processing) algorithm and covariance matrix reconstruction. This algorithm constructed a blocking matrix,preprocessed the echo signal. Then it obtained an appropriate covariance matrix,finally formed beam. This algorithm could block the mainlobe interference and suppressed the sidelobe interference and solved the problem of waveform distortion in the presence of mainlobe interference and sidelobe interference. Simulation verifies the effectiveness of the algorithm.

引文

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