基于矩阵差分的远场和近场混合源定位方法

刘振 苏晓龙 刘天鹏 彭勃 陈鑫 刘永祥

刘振, 苏晓龙, 刘天鹏, 等. 基于矩阵差分的远场和近场混合源定位方法[J]. 雷达学报, 2021, 10(3): 432–442. doi: 10.12000/JR20145
引用本文: 刘振, 苏晓龙, 刘天鹏, 等. 基于矩阵差分的远场和近场混合源定位方法[J]. 雷达学报, 2021, 10(3): 432–442. doi: 10.12000/JR20145
LIU Zhen, SU Xiaolong, LIU Tianpeng, et al. Matrix differencing method for mixed far-field and near-field source localization[J]. Journal of Radars, 2021, 10(3): 432–442. doi: 10.12000/JR20145
Citation: LIU Zhen, SU Xiaolong, LIU Tianpeng, et al. Matrix differencing method for mixed far-field and near-field source localization[J]. Journal of Radars, 2021, 10(3): 432–442. doi: 10.12000/JR20145

基于矩阵差分的远场和近场混合源定位方法

doi: 10.12000/JR20145
基金项目: 国家自然科学基金(62022091, 61921001, 61801488, 61701510)
详细信息
    作者简介:

    刘 振(1983–), 男,博士,国防科技大学电子科学学院教授,主要研究方向为雷达目标识别与对抗、阵列信号处理、机器学习

    苏晓龙(1994–),男,国防科技大学电子科学学院在读博士,主要研究方向为阵列信号处理和深度学习

    刘天鹏(1985–),男,博士,国防科技大学电子科学学院副研究员,主要研究方向为雷达信号处理、电子对抗和交叉眼干扰

    彭 勃(1986–), 男,博士,国防科技大学电子科学学院副研究员,主要研究方向为信号处理、微动谱特性分析和模式识别

    陈 鑫(1992–),男,国防科技大学电子科学学院在读博士,主要研究方向为阵列信号处理和无源定位

    刘永祥(1976–), 男,博士,国防科技大学电子科学学院教授,主要研究方向为雷达目标识别、雷达微动特性、阵列信号处理

    通讯作者:

    刘振 zhen_liu@nudt.edu.cn

    苏晓龙 suxiaolong_nudt@163.com

  • 责任主编:王鼎 Corresponding Editor: WANG Ding
  • 中图分类号: TN911.7

Matrix Differencing Method for Mixed Far-field andNear-field Source Localization

Funds: The National Natural Science Foundation of China (62022091, 61921001, 61801488, 61701510)
More Information
  • 摘要: 混合源定位在无源雷达中发挥着重要作用。针对均匀圆阵下基于相位差方法的定位精度较低的问题,该文提出基于矩阵差分的远场和近场混合源定位方法。首先,利用二维多重信号(2-D MUSIC)分类方法估计出远场源的方位角和俯仰角;随后,利用协方差矩阵差分方法提取出近场源差分矩阵,通过改进的类旋转不变估计信号参数(ESPRIT-like)方法计算出近场源的方位角和俯仰角;进一步地,利用一维多重信号分类方法估计出近场源的距离;最后通过仿真实验对该文所提算法进行验证。该文所提算法在远场源和近场源角度相同的情况下能够有效地识别混合源,并且提高混合源参数估计精度。实验结果表明该算法在信噪比(SNR)为20 dB时,近场源的二维DOA估计误差接近0.01°,而近场源的距离误差接近0.1 m。

     

  • 图  1  混合源模型

    Figure  1.  The geometric model of mixed sources

    图  2  基于协方差矩阵差分的混合源定位方法流程图

    Figure  2.  Flow chart of the mixed source localization based on the covariance differencing method

    图  3  混合源空间谱

    Figure  3.  Spatial spectrum of mixed sources

    图  4  不同信噪比下混合源RMSE

    Figure  4.  RMSE of mixed sources versus SNR

    图  5  不同快拍数下的混合源RMSE

    Figure  5.  RMSE of mixed sources versus snapshots

    图  6  近场源空间谱

    Figure  6.  Spatial spectrum of near-field source

    图  7  远场源空间谱

    Figure  7.  Spatial spectrum of far-field source

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出版历程
  • 收稿日期:  2020-11-30
  • 修回日期:  2021-01-16
  • 网络出版日期:  2021-02-08
  • 刊出日期:  2021-06-28

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