基于HHT的雷达杂波抑制  

Suppression of Radar Clutter Based on HHT

作　　者：朱丽平[1] 刘爱军[1] 王好贤[1] 毛兴鹏[1] 

机构地区：[1]哈尔滨工业大学(威海),山东威海264209

出　　处：《现代防御技术》2011年第6期185-190,共6页Modern Defence Technology

摘　　要：传统时频分析方法不适于分析非平稳信号,Hilbert-Huang变换(HHT)是近年兴起的一种自适应、高效处理非线性、非平稳信号的时频分析方法。针对传统时频分析对雷达杂波抑制的局限性,采用HHT方法抑制雷达杂波。HHT方法对雷达回波信号的时频特性具有较高的分辨能力,能够清晰地突出目标弹性成分。仿真结果表明使用EMD结合阈值去噪、尺度滤波方法对抑制雷达回波中的杂波有一定效果。Traditional methods of signal analysis and processing are not suitable for analyzing non- stationary signals. Hilbert-Huang transform （HHT） rising in recent years is an adaptive and efficient means for non-linear and non-stationary signal processing. It is used for the suppression of radar clutter o- ver the limitation of the traditional time-frequency analysis. HHT is able to resolve time-frequency char- acteristics of signals and highlight the flexible components of targets. Simulation results show that EMD combined with threshold denoising and scale filtering methods here is effective to remove clutters from the radar echo.

关 键 词：希尔伯特-黄变换 时频分析 杂波抑制 

分 类 号：TN957.51[电子电信—信号与信息处理] TP391.9[电子电信—信息与通信工程]