系统工程与电子技术 ›› 2020, Vol. 42 ›› Issue (11): 2481-2487.doi: 10.3969/j.issn.1001-506X.2020.11.09

• 传感器与信号处理 • 上一篇    下一篇

海杂波背景下基于MBMC的低空风切变风速估计方法

李海1(), 刘志鑫1(), 程伟杰1(), 庄子波2(), 范懿1()   

  1. 1. 中国民航大学天津市智能信号与图像处理重点实验室, 天津 300300
    2. 中国民航大学飞行技术学院, 天津 300300
  • 收稿日期:2020-03-03 出版日期:2020-11-01 发布日期:2020-11-05
  • 作者简介:李海(1976-),男,教授,博士,主要研究方向为机载气象雷达信号处理、分布式目标检测与估计、自适应信号处理、动目标检测与参数估计。E-mail:elisha1976@163.com|刘志鑫(1993),男,硕士研究生,主要研究方向为机载气象雷达信号处理。E-mail:liuzhixin_cauc@163.com|程伟杰(1993-),男,硕士研究生,主要研究方向为机载气象雷达信号处理。E-mail:2018022081@cauc.edu.cn|庄子波(1980-),男,副教授,硕士,主要研究方向为航空气象。E-mail:zbzhuang@cauc.edu.cn|范懿(1976-),女,讲师,博士,主要研究方向为机载雷达信号处理。E-mail:yifan@cauc.edu.cn
  • 基金资助:
    民机项目(MJ-2018-S-28);航空基金项目(20182067008);国家自然科学基金(U1433202);国家自然科学基金(U1733116);中央高校基本科研业务费项目(3122018D008);中国民航大学蓝天教学名师培养经费资助课题

Low-altitude wind shear wind speed estimation method based on MBMC under sea clutter

Hai LI1(), Zhixin LIU1(), Weijie CHENG1(), Zibo ZHUANG2(), Yi FAN1()   

  1. 1. Tianjin Key Lab for Advanced Signal Processing, Civil Aviation University of China, Tianjin 300300, China
    2. College of Flight Technology, Civil Aviation University of China, Tianjin 300300, China
  • Received:2020-03-03 Online:2020-11-01 Published:2020-11-05

摘要:

当机载气象雷达在海杂波背景下探测低空风切变时,海杂波信号会覆盖低空风切变信号,造成风速无法准确估计。针对上述问题,提出了一种在海杂波背景下基于多波束多级联(multi-beam multi-cascade, MBMC)的低空风切变风速估计方法。该方法首先利用空时插值算法矫正机载前视阵海杂波的距离依赖性,然后对空间多波束联合时域三次滑窗后的输出再级联多普勒滤波器,构造得到降维变换矩阵,执行空、时域联合自适应处理,最后通过构造代价函数估计得到风场速度。仿真结果表明,在海杂波背景下本文方法可以实现风场速度的准确估计,且具有较好的稳健性。

关键词: 机载气象雷达, 低空风切变, 风速估计, 海杂波

Abstract:

When the airborne weather radar detects low-altitude wind shear under the background of sea clutter, the sea clutter signal will cover the low-altitude wind shear signal, making it impossible to accurately estimate the wind speed. In view of the above problems, a low-altitude wind shear wind speed estimation method is proposed based on multi-beam multi-cascade (MBMC) under the background of sea clutter. Firstly, This method uses the space-time interpolation algorithm to correct the distance dependence of the airborne forward-looking sea clutter, and then cascades the Doppler filter to the output of the adjacent multi-beam in the spatial domain joint sliding three times in the time domain, constructing a dimensionality reduction matrix, performing joint adaptive processing in space and time domains, and finally constructing a cost function to estimate the wind field velocity. The simulation results show that the proposed method can accurately estimate the wind speed under the background of sea clutter, and has good robustness.

Key words: airborne weather radar, low-altitude wind shear, wind speed estimation, sea clutter

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