首页期刊简介编委会投稿启事审稿流程读者订阅广告服务联系我们English
引用本文
  •    [点击复制]
  •    [点击复制]
【打印本页】 【下载PDF全文】 查看/发表评论下载PDF阅读器关闭

←前一篇|后一篇→

过刊浏览    高级检索

本文已被:浏览 244次   下载 0 本文二维码信息
码上扫一扫!
基于协方差矩阵重构的阵元失效MIMO雷达DOA估计
陈金立,卓齐刚,李家强,陈宣
0
(南京信息工程大学 a.气象灾害预报预警与评估协同创新中心;b.电子与信息工程学院,南京210044;南京信息工程大学 物理与光电工程学院,南京210044)
摘要:
在实际应用中由于恶劣环境或人为干扰等因素而导致多输入多输出(Multiple-Input Multiple-Output,MIMO)雷达部分阵元失效,使得其接收数据缺失及其协方差矩阵秩亏,从而导致子空间类算法的波达方向(Direction of Arrival,DOA)估计性能恶化甚至完全失效。针对上述问题,提出了一种接收阵元失效下基于协方差矩阵重构的MIMO雷达DOA估计方法。该方法根据MIMO雷达协方差矩阵中以接收阵元数划分的子方块矩阵具有Toeplitz特性,利用正常工作接收阵元的协方差矩阵元素来恢复相应的缺失元素,从而重构出完整的数据协方差矩阵,提高阵元失效MIMO雷达的DOA估计性能。仿真结果验证了所提方法的有效性。
关键词:  MIMO雷达  DOA估计  阵元失效  协方差矩阵重构
DOI:
基金项目:国家自然科学基金资助项目(61302188,61372066,11304394);江苏省自然科学基金项目(BK20131005)
DOA estimation in MIMO radar with broken elements based on covariance matrix reconstruction
CHEN Jinli,ZHUO Qigang,LI Jiaqiang,CHEN Xuan
(a.Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters;b.School of Electronic and Information Engineering,Nanjing University of Information Science and Technology,Nanjing 210044,China;School of Physics and Optoelectronic Engineering,Nanjing University of Information Science and Technology,Nanjing 210044,China)
Abstract:
Some elements of the multiple-input multiple-output(MIMO) radar are damaged due to harsh environment or human interference in practical application.Therefore,the received data of MIMO radar is lost and the rank of covariance matrix is degenerated,which causes the performance of the subspace algorithm to be deteriorated or even completely failed.A direction-of-arrival(DOA) estimation method for MIMO radar based on covariance matrix reconstruction under receiver element defect is proposed.Firstly,some square sub-matrices are divided from the covariance matrix of MIMO radar according to the number of receiving arrays,which have the property of Toeplitz.The data elements corresponding to the missing elements in the covariance are constructed from the intact elements.Then a complete covariance matrix is obtained to improve the DOA estimation performance of MIMO radar with missing elements.Simulation results demonstrate the effectiveness of the proposed algorithm.
Key words:  MIMO radar  DOA estimation  broken elements  covariance matrix reconstruction
安全联盟站长平台