一种双极化气象雷达自适应谱极化滤波方法

安孟昀; 殷加鹏; 黄建开; 庞晨; 李永祯; 王雪松

doi:10.12000/JR21199

一种双极化气象雷达自适应谱极化滤波方法

doi: 10.12000/JR21199

国防科技大学电子信息系统复杂电磁环境效应国家重点实验室长沙 410073

基金项目: 国家自然科学基金(61971429, 62171447)，博士后国际交流计划引进项目(48132)，湖南省科技创新人才计划优秀博士后创新人才项目(2020RC2042)，国防科技大学科研计划项目(ZK21-25)

详细信息

作者简介:
安孟昀(1997–)，女，河北人，在读博士研究生，主要研究方向为极化雷达信号处理

殷加鹏(1990–)，男，浙江人，国防科技大学副研究员，主要研究方向为极化雷达信号处理

黄建开(1994–)，男，福建人，在读博士研究生，主要研究方向为极化雷达信号处理

庞　晨(1986–)，男，湖北人，国防科技大学副研究员，主要研究方向为极化信息处理、雷达目标分辨与识别技术

李永祯(1977–)，男，内蒙古人，国防科技大学研究员、博士生导师，主要研究方向为雷达极化信息处理、空间电子对抗、目标检测与识别

王雪松(1972–)，男，内蒙古人，国防科技大学教授、博士生导师，主要研究方向为新体制雷达技术、极化成像与识别、智能电子防御与电子对抗

通讯作者:
殷加鹏 yinjiapeng@nudt.edu.cn

责任主编：李海 Corresponding Editor: LI Hai
中图分类号: TN95
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出版历程
- 收稿日期: 2021-12-06
- 修回日期: 2022-01-21
- 网络出版日期: 2022-03-08
- 刊出日期: 2022-06-28

Adaptive Spectral Polarization Filter Design for Dual-polarization Weather Radar

State Key Laboratory of Complex Electromagnetic Environment Effects on Electronics and Information System, National University of Defense Technology, Changsha 410073, China

Funds: The National Natural Science Foundation of China (61971429, 62171447), Postdoctoral International Exchange Program (48132), Science and Technology Innovation Program of Hunan Province (2020RC2042), The Scientific Research Program of the National University of Defense Technology (ZK21-25)

More Information

Corresponding author: YIN Jiapeng, yinjiapeng@nudt.edu.cn

摘要

摘要: 针对双极化气象雷达中非气象回波的滤除问题，该文提出一种基于詹森-香农散度原理的自适应移动谱去极化比(AMsDR)滤波方法。该方法根据不同方位向回波的谱去极化比分布情况，利用气象回波和杂波在距离-多普勒图上的特征差异实现气象回波的保留和杂波的滤除。与现有固定阈值的移动谱去极化比滤波器相比，AMsDR滤波方法可根据不同方位向降雨和杂波的回波差异自适应地选择滤波阈值，提高杂波抑制与降雨保留性能。
- 双极化 /
- 气象雷达 /
- 詹森-香农散度 /
- 杂波抑制 /
- 自适应谱极化滤波
Abstract: This paper proposes an adaptive filtering method called the Adaptive Moving spectral Depolarization Ratio (AMsDR) filter to mitigate the clutter for dual-polarization weather radar based on Jensen-Shannon divergence principle. Specifically, the spectral depolarization ratio in the range-Doppler domain is the main variable distinguishing precipitation from clutter. The AMsDR filter can remove the clutter and noise and retain precipitation based on the difference of the spectral polarization feature and the spectral continuity of precipitation and clutter. The AMsDR filter can adaptively select the filter threshold depending on the echo difference between precipitation and clutter in different azimuths. Thus, the performance of the proposed filter is better than that of the current methods.
- Dual-polarization /
- Weather radar /
- Jensen-Shannon divergence /
- Clutter mitigation /
- Adaptive spectral polarimetric filter

HTML全文

图 1 AMsDR滤波器流程图

Figure 1. Flow chart of the AMsDR filter

下载: 全尺寸图片幻灯片

图 2 阈值选取算法流程图

Figure 2. Flow chart of the algorithm for threshold selection

下载: 全尺寸图片幻灯片

图 3 原始反射率

Figure 3. Raw reflectivity

下载: 全尺寸图片幻灯片

图 4 IDRA雷达在方位角为316.9°时的谱极化参数

Figure 4. The spectral polarimetric variables of IDRA radar at an azimuth angle of 316.9°

下载: 全尺寸图片幻灯片

图 5 JS散度与阈值T的关系

Figure 5. Relationship between the JS divergence and the threshold T

下载: 全尺寸图片幻灯片

图 6 滤波之后的谱功率

Figure 6. Spectral power after filtering

下载: 全尺寸图片幻灯片

图 7 滤波处理后的反射率

Figure 7. Reflectivity after filtering

下载: 全尺寸图片幻灯片

图 8 2016年3月4日00:00 (UTC时间)的雷达数据不同处理后的反射率因子

Figure 8. Reflectivity after different processing of the radar data at 00:00, 4 March 2016 (UTC time)

下载: 全尺寸图片幻灯片

图 9 2017年4月26日12:00 (UTC时间)的雷达数据不同处理后的反射率因子

Figure 9. Reflectivity after different processing of the radar data at 12:00, 26 April 2017 (UTC time)

下载: 全尺寸图片幻灯片

表 1 IDRA雷达参数

Table 1. IDRA radar specifications

参数	数值或属性
类型	线性FMCW
发射机类型	固态
极化类型	ATSR模式
中心频率	9.475 GHz
发射功率	20 W
扫描时间	409.6 μs
带宽	5 MHz
天线宽度	1.8°
扫描角	俯仰角0.5° 方位角0°～360°
扫描周期	1圈/min

下载: 导出CSV

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