强地杂波背景下线性调频信号雷达微多普勒提取新方法  

A New Method for Information Extraction of Micro-Doppler in Strong Ground Clutter with Chirp Signal

作　　者：李开明[1] 李宏静[2] 张群[1,3] 罗迎[1] 

机构地区：[1]空军工程大学电讯工程学院,西安710077 [2]西南大学地理科学学院,重庆400715 [3]复旦大学波散射与遥感信息国家教育部重点实验室,上海200433

出　　处：《电光与控制》2010年第2期82-87,共6页Electronics Optics & Control

基　　金：国家自然科学基金项目(60672032);陕西省自然科学基础研究计划项目(2007F28)

摘　　要：在线性调频信号体制下,针对强地杂波背景下含旋转部件目标ISAR成像问题,提出一种微多普勒信息提取新方法。首先在信号域使用相消技术剔除地杂波,拉伸处理后将相消原理应用于谱图域,从而有效实现了微多普勒信息的分离与提取,并得到了目标较为清晰的ISAR像,通过对3种地物杂波的仿真,验证了其可行性。Under chirp radar, in order to solve the imaging problem of a target with rotating parts in strong ground clutter, a new method for extracting micro-Doppler information was proposed. We applied cancellation technique in time domain to eliminate ground clutter, and transplanted the cancellation principle into spectrogram, which could effectively achieve the extraction and separation of micro-Doppler. Thus a clearer ISAR image of the target was obtained. The feasibility of the method was proved by the simulation to three kinds of ground clutter.

关 键 词：目标识别 雷达信号处理 地杂波 相消技术 谱图域 微多普勒 

分 类 号：V271.4[航空宇航科学与技术—飞行器设计] TN958[电子电信—信号与信息处理]