基于互质阵列的运动单站信号直接定位方法

吴癸周 张源 张文俊 裴禹豪 张敏 郭福成

吴癸周, 张源, 张文俊, 等. 基于互质阵列的运动单站信号直接定位方法[J]. 雷达学报, 2022, 11(4): 692–704. doi: 10.12000/JR22056
引用本文: 吴癸周, 张源, 张文俊, 等. 基于互质阵列的运动单站信号直接定位方法[J]. 雷达学报, 2022, 11(4): 692–704. doi: 10.12000/JR22056
WU Guizhou, ZHANG Yuan, ZHANG Wenjun, et al. Coprime array based direct position determination of signals with single moving observation[J]. Journal of Radars, 2022, 11(4): 692–704. doi: 10.12000/JR22056
Citation: WU Guizhou, ZHANG Yuan, ZHANG Wenjun, et al. Coprime array based direct position determination of signals with single moving observation[J]. Journal of Radars, 2022, 11(4): 692–704. doi: 10.12000/JR22056

基于互质阵列的运动单站信号直接定位方法

doi: 10.12000/JR22056
基金项目: 国家青年自然科学基金(62101563),国防科技大学科研计划项目(ZK20-26)
详细信息
    作者简介:

    吴癸周(1990-),男,博士,讲师,主要研究方向为无源定位和目标跟踪、雷达信号处理

    张 源(1997-),女,博士研究生,主要研究方向为无源定位、信号处理

    张文俊(1992-),男,博士研究生,主要研究方向为无源定位和目标跟踪

    裴禹豪(1992-),男,博士研究生,主要研究方向为无源定位、信号处理

    张 敏(1984-),男,博士,副教授,主要研究方向为雷达信号处理、无源定位和目标跟踪

    郭福成(1975-),男,博士,教授,主要研究方向为无源定位和目标跟踪、雷达信号处理

    通讯作者:

    张源 zhangyuan@nudt.edu.cn

  • 责任主编:易伟 Corresponding Editor: YI Wei
  • 中图分类号: TN97

Coprime Array Based Direct Position Determination of Signals with Single Moving Observation

Funds: The National Natural Science Foundation of China (62101563), The Scientific Research Project of National University of Defense Technology (ZK20-26)
More Information
  • 摘要: 信号直接定位方法是一种新型无源定位体制,具有适应低信噪比、无需参数关联等优势。为适应复杂电磁环境,该文提出了一种基于互质阵列的运动单站信号直接定位方法。以典型窄带信号为例,该文首先构建了互质阵列截获信号模型,然后推导了其差分共性阵对应的等效信号数学模型,最后使用空间谱技术构建了直接定位代价函数,实现了定位。经仿真分析验证,采用相同互质阵列时,该方法在分辨率和精度稍有损失的情况下可大幅提升传统直接定位方法的自由度,且与基于均匀线阵的直接定位方法相比,该方法在自由度、分辨率和定位精度等方面都具有优势。

     

  • 图  1  互质阵列示意图

    Figure  1.  Coprime array diagram

    图  2  直接定位场景示意图

    Figure  2.  Scenario diagram of direct position determination

    图  3  等效的差分共性阵

    Figure  3.  The equivalent difference co-array

    图  4  运动单观测站对6个辐射源进行定位场景示意图

    Figure  4.  The scene of 6 radiation sources localized by single moving observation

    图  5  CA-DPD代价函数

    Figure  5.  CA-DPD cost function

    图  6  CA-DPD多目标代价函数谱

    Figure  6.  Multiple target cost function spectrum of CA-DPD

    图  7  临近目标代价函数谱

    Figure  7.  Cost function spectrum of adjacent targets

    图  8  定位均方根误差与e关系图

    Figure  8.  The effect of e on localization RMSE

    图  9  单个目标代价函数谱

    Figure  9.  Cost function spectrum of single target

    图  10  定位均方根误差与SNR关系图

    Figure  10.  The effect of SNR on localization RMSE

    图  11  定位均方根误差与快拍数关系图

    Figure  11.  Relation between the number of sampling points in each observation interval and localization RMSE

    图  12  定位均方根误差与观测批次数关系图

    Figure  12.  Relation between the number of observation interval and localization RMSE

    表  1  算法耗时

    Table  1.   Elapsed time of algorithms

    算法耗时(ms)
    ULA-DPD1192.0
    CA-DPD1337.1
    CAori-DPD1197.3
    CA-2Step276.9
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出版历程
  • 收稿日期:  2022-03-30
  • 修回日期:  2022-05-23
  • 网络出版日期:  2022-06-15
  • 刊出日期:  2022-08-28

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