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复杂地形环境下基于GAMP-STAP的低空风切变风速估计方法

李海 谢瑞杰 谢伶莉 孟凡旺

李海, 谢瑞杰, 谢伶莉, 孟凡旺. 复杂地形环境下基于GAMP-STAP的低空风切变风速估计方法[J]. 电子与信息学报, 2023, 45(2): 576-584. doi: 10.11999/JEIT211500
引用本文: 李海, 谢瑞杰, 谢伶莉, 孟凡旺. 复杂地形环境下基于GAMP-STAP的低空风切变风速估计方法[J]. 电子与信息学报, 2023, 45(2): 576-584. doi: 10.11999/JEIT211500
LI Hai, XIE Ruijie, XIE Lingli, MENG Fanwang. Low-altitude Wind Shear Wind Speed Estimation Method Based on GAMP-STAP in Complex Terrain Environment[J]. Journal of Electronics & Information Technology, 2023, 45(2): 576-584. doi: 10.11999/JEIT211500
Citation: LI Hai, XIE Ruijie, XIE Lingli, MENG Fanwang. Low-altitude Wind Shear Wind Speed Estimation Method Based on GAMP-STAP in Complex Terrain Environment[J]. Journal of Electronics & Information Technology, 2023, 45(2): 576-584. doi: 10.11999/JEIT211500

复杂地形环境下基于GAMP-STAP的低空风切变风速估计方法

doi: 10.11999/JEIT211500
基金项目: 民机项目(MJ-2018-S-28),天津市自然基金重点项目(20JCZDJC00490),航空基金项目(20182067008),中央高校基本科研业务费项目(3122015B002)
详细信息
    作者简介:

    李海:男,教授,硕士生导师,主要研究方向为机载气象雷达信号处理、分布式目标检测、参数估计、动目标检测等

    谢瑞杰:男,硕士生,研究方向为机载气象雷达信号处理

    谢伶莉:女,硕士生,研究方向为机载气象雷达信号处理

    孟凡旺:男,高级工程师,硕士,研究方向为机载气象雷达系统设计、信号处理

    通讯作者:

    李海 haili@cauc.edu.cn

  • 中图分类号: TN959.4

Low-altitude Wind Shear Wind Speed Estimation Method Based on GAMP-STAP in Complex Terrain Environment

Funds: The Civil Aircraft Project (MJ-2018-S-28), The Key Projects of Tianjin Natural Fund(20JCZDJC00490), The Aviation Foundation of China (20182067008), The Basic Scientific Research Project of Universities of The CPC Central Committee (3122015B002)
  • 摘要: 针对机载气象雷达在复杂的地形环境下探测低空风切变时,地杂波呈现非均匀特征和难以获取足够的独立同分布(IID)样本,导致空时自适应处理(STAP)杂波抑制性能变差,使得风切变风速估计不准的问题。该文基于杂波信号稀疏特性,提出一种广义近似消息传递(GAMP)STAP方法,GAMP-STAP仅利用少量的样本在复杂地形环境下实现了风速较准确的估计。该方法首先利用杂波脊的先验信息构造稀疏字典,然后在贝叶斯框架下利用GAMP算法估计杂波幅度,恢复杂波功率谱,进而计算杂波协方差矩阵,最后构造STAP滤波器实现杂波抑制以及风切变风速估计。后续实验仿真结果证明了该方法的有效性。
  • 图  1  机载气象雷达视探测低空风切变几何模型

    图  2  GAMP-STAP的低空风切变风速估计原理框图

    图  3  GAMP算法估计待重建信号因子图

    图  4  基于GAMP-STAP的风切变风速估计方法流程图

    图  5  地杂波距离多普勒图

    图  6  机载气象雷达回波空时2维谱

    图  7  GAMP算法恢复的杂波功率谱

    图  8  不同方法风速估计结果对比

    表  1  雷达系统仿真参数

    参数参数
    载机高度(m)600阵元数8
    载机速度(m/s)87.5采样脉冲数64
    雷达波长(m)0.032主瓣方向(°)(90, 0)
    脉冲重复频率(Hz)7000杂噪比(dB)40
    距离分辨率(m)150信噪比(dB)5
    下载: 导出CSV

    表  2  算法运行时间对比

    方法运行环境计算机CPU计算复杂度运行时间(s)
    传统SBL-STAPMATLAB R2018b3.4 GHz Intel(R) Core(TM) i7-6700,内存12 GB$ O\left( {{W^3}} \right) $511
    GAMP-STAP$ O\left( {WG} \right) $73
    下载: 导出CSV
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出版历程
  • 收稿日期:  2021-12-13
  • 修回日期:  2022-06-23
  • 录用日期:  2022-07-14
  • 网络出版日期:  2022-07-19
  • 刊出日期:  2023-02-07

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