基于多普勒扩展补偿的FDA-MIMO雷达运动目标检测

张顺生 刘美慧 王文钦

张顺生, 刘美慧, 王文钦. 基于多普勒扩展补偿的FDA-MIMO雷达运动目标检测[J]. 雷达学报, 2022, 11(4): 666–675. doi: 10.12000/JR22042
引用本文: 张顺生, 刘美慧, 王文钦. 基于多普勒扩展补偿的FDA-MIMO雷达运动目标检测[J]. 雷达学报, 2022, 11(4): 666–675. doi: 10.12000/JR22042
ZHANG Shunsheng, LIU Meihui, and WANG Wenqin. FDA-MIMO radar moving target detection based on Doppler spread compensation[J]. Journal of Radars, 2022, 11(4): 666–675. doi: 10.12000/JR22042
Citation: ZHANG Shunsheng, LIU Meihui, and WANG Wenqin. FDA-MIMO radar moving target detection based on Doppler spread compensation[J]. Journal of Radars, 2022, 11(4): 666–675. doi: 10.12000/JR22042

基于多普勒扩展补偿的FDA-MIMO雷达运动目标检测

doi: 10.12000/JR22042
基金项目: 国家自然科学基金(62171092)
详细信息
    作者简介:

    张顺生(1980-),男,研究员,博士生导师,主要研究方向为雷达信号处理

    刘美慧(1997-),女,电子科技大学在读硕士研究生,主要研究方向为频控阵雷达运动目标检测

    王文钦(1979-),男,教授,博士生导师,主要研究方向为阵列处理及其在雷达、通信和电子对抗中的应用研究

    通讯作者:

    张顺生 zhangss@uestc.edu.cn

  • 责任主编:朱圣棋 Corresponding Editor: ZHU Shengqi
  • 中图分类号: TN958

FDA-MIMO Radar Moving Target Detection Based on Doppler Spread Compensation

Funds: The National Natural Science Foundation of China (62171092)
More Information
  • 摘要: 频控阵-多输入多输出(FDA-MIMO)雷达在检测运动目标时,由于发射阵元间的频率偏移与目标的速度耦合,因此在慢时间维出现严重的多普勒扩展,进一步造成各接收通道的信号能量无法相干累积,极大降低了系统的检测性能。针对此问题,该文提出一种基于多普勒扩展补偿的FDA-MIMO雷达运动目标检测算法。首先建立了FDA-MIMO雷达运动目标的回波模型,分析了频偏带来的多普勒扩展问题;然后在给出最大似然接收机模型的基础上,提出一种基于插值滤波的重采样算法来补偿FDA-MIMO雷达在检测运动目标时引起的多普勒扩展。仿真结果表明:该文所提算法在抑制多普勒扩展的同时,能够补偿子目标回波在距离维的跨单元走动,实现信号能量的相参累积。

     

  • 图  1  FDA-MIMO雷达发射接收阵列模型

    Figure  1.  FDA-MIMO radar transmit and receive array model

    图  2  频控阵-多输入多输出雷达最大似然接收机模型

    Figure  2.  Maximum likelihood receiver model for FDA-MIMO radar

    图  3  距离走动与多普勒扩展示意图

    Figure  3.  Schematic diagram of range migration and Doppler spread

    图  4  FDA-MIMO雷达运动目标检测流程图

    Figure  4.  The flowchart of moving target detection for FDA-MIMO radar

    图  5  接收阵元1的每个通道的多普勒频率中心

    Figure  5.  The Doppler frequency center of each channel of the first receiving array element

    图  6  接收阵元1的各通道信号在使用所提算法前后的距离-多普勒二维图

    Figure  6.  The range Doppler two-dimensional graph of each channel signal of the first receiving array element before and after using the algorithm

    图  7  未补偿多普勒扩展下的相干累积结果

    Figure  7.  Coherent accumulation results with uncompensated Doppler spread

    图  8  补偿多普勒扩展的相干累积结果

    Figure  8.  Coherent accumulation results with compensated Doppler spread

    图  9  频偏$ \Delta f = 10$ MHz 时,相干处理增益随相干处理间隔的变化曲线

    Figure  9.  When the frequency offset $ \Delta f = 10 $ MHz, the gain of coherent accumulation varies with the coherent processing interval

    图  10  相干处理间隔为96 ms时,处理增益随频偏的变化曲线

    Figure  10.  When the coherent processing time is 96 ms, the gain of coherent accumulation varies with frequency offset

    图  11  检测概率曲线图(${P_{{\rm{fa}}}} = 0.001$)

    Figure  11.  Detection probability graph (${P_{{\rm{fa}}}} = 0.001$)

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出版历程
  • 收稿日期:  2022-03-09
  • 修回日期:  2022-05-25
  • 网络出版日期:  2022-06-21
  • 刊出日期:  2022-08-28

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