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基于双迭代MVDR波束形成的MIMO-OTHR多模扩展多普勒杂波抑制算法

于文启 陈建文 李雪

于文启, 陈建文, 李雪. 基于双迭代MVDR波束形成的MIMO-OTHR多模扩展多普勒杂波抑制算法[J]. 电子与信息学报, 2018, 40(11): 2667-2675. doi: 10.11999/JEIT180101
引用本文: 于文启, 陈建文, 李雪. 基于双迭代MVDR波束形成的MIMO-OTHR多模扩展多普勒杂波抑制算法[J]. 电子与信息学报, 2018, 40(11): 2667-2675. doi: 10.11999/JEIT180101
Wenqi YU, Jianwen CHEN, Xue LI. Multi-mode Spread Doppler Clutter Suppression Algorithm of MIMO-OTHR Based on Bi-iterative MVDR Beamformer[J]. Journal of Electronics & Information Technology, 2018, 40(11): 2667-2675. doi: 10.11999/JEIT180101
Citation: Wenqi YU, Jianwen CHEN, Xue LI. Multi-mode Spread Doppler Clutter Suppression Algorithm of MIMO-OTHR Based on Bi-iterative MVDR Beamformer[J]. Journal of Electronics & Information Technology, 2018, 40(11): 2667-2675. doi: 10.11999/JEIT180101

基于双迭代MVDR波束形成的MIMO-OTHR多模扩展多普勒杂波抑制算法

doi: 10.11999/JEIT180101
基金项目: 国家自然科学基金(61471391)
详细信息
    作者简介:

    于文启:男,1990年生,博士生,研究方向为目标检测与识别、天波超视距雷达信号处理

    陈建文:男,1964年生,教授,博士生导师,从事天波超视距雷达信号处理、阵列信号处理等的研究

    李雪:男,1981年生,高级工程师,研究方向为天波返回散射电离图模拟和判读以及电离层回波信号处理、雷达信号处理等

    通讯作者:

    陈建文  cjwll8217@163.com

  • 中图分类号: TN958

Multi-mode Spread Doppler Clutter Suppression Algorithm of MIMO-OTHR Based on Bi-iterative MVDR Beamformer

Funds: The National Natural Science Fundation of China (61471391)
  • 摘要: 针对多模传播引起的扩展多普勒杂波影响天波超视距雷达对低可探测慢速舰船目标检测性能的问题,该文在新一代多输入多输出天波超视距雷达系统下,利用双迭代最小方差无失真响应(MVDR)波束形成器抑制多模扩展多普勒杂波。考虑到时间叉排线性调频连续波MIMO天波雷达和慢时间相位编码MIMO天波雷达在有限相干积累时间内的训练样本数有限,且训练样本中包含主选模式期望信号,该文利用阻塞矩阵进行数据预处理,减小训练样本中的主选模式期望信号影响,并将LN×1维“发射-接收”2维权矢量优化分解为L×1维发射权矢量和N×1维接收权矢量,通过双迭代计算恢复出的2维MVDR权矢量来抑制多模扩展多普勒杂波,减小了计算量和样本需求。理论分析和仿真验证了算法的有效性。
  • 图  1  高频电波经多层电离层返回散射传播示意图

    图  2  算法总流程图

    图  3  MVDR波束形成收发联合方向图和多模SDC抑制后的多普勒谱图

    图  4  算法收敛随迭代次数的变化曲线

    图  5  迭代MVDR波束形成收发联合方向图

    图  6  迭代MVDR波束形成多模SDC抑制后的多普勒谱图

    表  1  各传播模式的DOD, DOA(°)

    传播模式 模式1 模式2 模式3 模式4
    DOD 60 47 40 55
    DOA 60 57 40 45
    下载: 导出CSV

    表  2  各传播模式的归一化增益值(dB)

    传播模式 模式1 模式2 模式3 模式4
    迭代1次 –8.5 –55.1 –56.2 –52.8
    迭代5次 –0.1 –81.7 –68.2 –63.1
    下载: 导出CSV
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出版历程
  • 收稿日期:  2018-01-24
  • 修回日期:  2018-06-20
  • 网络出版日期:  2018-07-16
  • 刊出日期:  2018-11-01

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