摘要
毫米波雷达信号在降雨环境下传播时,会产生雨杂波,对雷达目标测距精度产生较大影响。本文研究了毫米波雷达信号在降雨环境下的衰减计算方法,给出了单次散射情况下毫米波雷达的体反射率,明确了降雨环境下的雷达方程。并根据雨滴尺寸分布特性建立降雨环境下的雨滴谱三维分布模型与雷达探测范围模型,仿真分析了降雨环境下的雷达测距结果。提出了一种基于四阶累积量与正交联合近似对角化的盲源信号分离算法,对降雨环境下雷达混合接收信号进行分离,实验结果证明了该方法的有效性。
When millimeter wave radar signals propagate in rainy environments,they generate rain clutter,which has a significant impact on the radar target measuring distance accuracy.This article studies the attenuation calculation method of millimeter wave radar signals in rainfall environments,provides the volume reflectance of millimeter wave radar under single scattering,and clarifies the radar equation in rainfall environments.And based on the size distribution characteristics of raindrops,a three-dimensional distribution model of raindrop spectrum and a radar detection range model are established in the rainfall environment.The results of measuring distance by radar in the rainfall environment are simulated and analyzed.A blind source separation algorithm based on fourth-order Cumulant and orthogonal joint approximate diagonalization is proposed to separate radar mixed received signals in rain environment.Experimental results show the effectiveness of this method.
作者
詹承进
张淑宁
朱凌智
陈思
ZHAN Cheng-jin;ZHANG Shu-ning;ZHU Ling-zhi;CHEN Si(College of Electronic Engineering and Optoelectronics Technology,Nanjing University of Science and Technology,Nanjing 210094,China)
出处
《微波学报》
CSCD
北大核心
2023年第S01期272-276,共5页
Journal of Microwaves
基金
国家自然科学基金面上项目(62271261、61971226)
江苏省自然科学青年基金(BK20220941)
江苏省自然科学优秀青年基金(BK20200075)
江苏省卓越博士后计划(2022ZB257)
关键词
毫米波雷达
雨杂波
盲源信号分离
millimeter wave radar
rain clutter
blind signal separation