LFMCW体制下基于TDPC-JDL的低空风切变风速估计方法  

Wind speed estimation of low-altitude wind-shear based on TDPC-JDL under LFMCW system

作　　者：李海[1] 宋迪 呼延泽 冯青[1] 庄子波 LI Hai;SONG Di;HUYAN Ze;FENG Qing;ZHUANG Zibo(Tianjin Key Lab for Advanced Signal Processing, Civil Aviation University of China, Tianjin 300300, China;Flight Technology College, Civil Aviation University of China, Tianjin 300300, China)

机构地区：[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

出　　处：《系统工程与电子技术》2020年第7期1504-1509,共6页Systems Engineering and Electronics

基　　金：民机项目(MJ-2018-S-28);航空基金(20182067008);国家自然科学基金(U1433202,U1733116);中央高校基本科研业务费(3122018D008);中国民航大学蓝天教学名师培养经费资助课题。

摘　　要：机载气象雷达下视探测低空风切变时目标信号会淹没在强杂波背景中,针对风场速度估计不准的问题,提出了一种线性调频连续波(linear frequency modulated continuous wave,LFMCW)体制下基于两维两脉冲对消局域联合处理(two dimensional pulse-to-pulse canceller-joint domain localised,TDPC-JDL)的低空风切变风速估计方法。该方法首先利用载机速度和雷达工作参数设计TDPC预滤波器对回波数据进行预滤波,降低杂波功率;然后,利用局域联合处理对预滤波后的数据进行空时二维滤波;进而实现风场速度的准确估计。The target signal will be submerged in the strong clutter background when the airborne weather radar downlooking detects low-altitude wind-shear.Aiming at the problem that the estimation of the wind velocity is not accurate,a low-altitude wind-shear velocity estimation method is proposed based on two dimensional pulse-to-pulse canceller-joint domain localised(TDPC-JDL)in the linear frequency modulated continuous wave(LFMCW)system.Firstly,the TDPC pre-filter is designed to pre-filter the echo data by using the airborne velocity and radar operating parameters to reduce clutter power.Then,the pre-filtered data is subjected to the space-time two-dimensional filtering by local joint processing,and the accurate estimation of wind speed is realized.

关 键 词：机载气象雷达 线性调频连续波 两维两脉冲对消局域联合处理 低空风切变 风速估计 

分 类 号：TN959.4[电子电信—信号与信息处理]