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多径条件下米波频分MIMO雷达波束性能及优化方法

李星星 王党卫 马晓岩

李星星, 王党卫, 马晓岩. 多径条件下米波频分MIMO雷达波束性能及优化方法[J]. 电子与信息学报, 2018, 40(8): 1787-1794. doi: 10.11999/JEIT171030
引用本文: 李星星, 王党卫, 马晓岩. 多径条件下米波频分MIMO雷达波束性能及优化方法[J]. 电子与信息学报, 2018, 40(8): 1787-1794. doi: 10.11999/JEIT171030
Xingxing LI, Dangwei WANG, Xiaoyan MA. Beam Performance and Optimization Method for Meter-wave Frequency Diverse MIMO Radar in Multipath Scenario[J]. Journal of Electronics & Information Technology, 2018, 40(8): 1787-1794. doi: 10.11999/JEIT171030
Citation: Xingxing LI, Dangwei WANG, Xiaoyan MA. Beam Performance and Optimization Method for Meter-wave Frequency Diverse MIMO Radar in Multipath Scenario[J]. Journal of Electronics & Information Technology, 2018, 40(8): 1787-1794. doi: 10.11999/JEIT171030

多径条件下米波频分MIMO雷达波束性能及优化方法

doi: 10.11999/JEIT171030
基金项目: 国家自然科学基金(61179015)
详细信息
    作者简介:

    李星星:男 1988年生,博士生,研究方向为MIMO雷达信号处理、自适应波束形成与目标定位

    王党卫:男 1977年生,副教授,研究方向为MIMO雷达信号处理、目标成像与识别

    马晓岩:男 1962年生,教授,博士生导师,研究方向为雷达系统、雷达信号处理与检测理论、现代信号处理及其应用

    通讯作者:

    李星星   li_x_xing@163.com

  • 中图分类号: TN957

Beam Performance and Optimization Method for Meter-wave Frequency Diverse MIMO Radar in Multipath Scenario

Funds: The National Natural Science Foundation of China (61179015)
  • 摘要: 针对传统米波雷达低仰角下波瓣分裂和盲区问题,该文提出一种频率分集子孔径MIMO雷达,构建了该体制下多径特性定量分析的理论框架,推导了镜面反射和扰动多径模型及其联合发射-接收方向图增益闭合表达式;提出了多径抑制区概念及其边界条件,定义了描述低空波束覆盖性能的低可观测率定量评价指标;根据边界条件的解集优化了波束覆盖性能。理论分析和仿真结果表明由于充分利用了频率分集产生的距离依赖波束,该体制雷达相对传统MIMO相控阵雷达具有更优的低空波束覆盖性能,减小了米波雷达波瓣分裂和探测盲区。
  • 图  1  米波频率分集MIMO雷达多径几何模型

    图  2  FDS-MIMO雷达方向图增益曲面

    图  3  MIMO相控阵雷达方向图增益曲面

    图  4  100 km切面多径抑制区

    图  5  LOR随频偏变化曲线

    图  6  不同飞行路径下接收回波强度随时间变化曲线

    图  7  不同扰动条件下LOR随仰角变化曲线

    图  8  不同扰动条件下LOR随距离变化曲线

    表  1  低可观测时间(s)

    飞行路径 1 2 3 4
    MIMO相控阵体制 34.15 34.15 22.39 18.87
    MIMO频率分集体制(优化 $\Delta f$) 8.70 0 0.75 1.00
    下载: 导出CSV

    表  2  扰动散射系数分布

    编号 A B C D E
    幅度 1 (0.9, 10) (0.7, 1) (0.6, 1) (0.4, 1)
    相位 $(^\circ )$ –180 (–190, –170) (–200, –160) (–200, –150) (–220, –140)
    下载: 导出CSV
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出版历程
  • 收稿日期:  2017-11-01
  • 修回日期:  2018-04-26
  • 网络出版日期:  2018-06-07
  • 刊出日期:  2018-08-01

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