弹道中段进动目标非理想散射中心微动特性研究  

Micro-Motion Characteristics of Non-Ideal Scattering Centers of Midcourse Targets with Precession

作　　者：姚辉伟[1] 魏玺章[1] 徐少坤[1] 毛钧杰[1] 

机构地区：[1]国防科技大学电子科学与工程学院空间电子信息技术研究所,湖南长沙410073

出　　处：《电子学报》2012年第9期1844-1851,共8页Acta Electronica Sinica

基　　金：国家自然科学基金委杰出青年基金(No.61025006)

摘　　要：传统中段进动目标微动特性研究通常将目标散射中心视为理想散射中心,且用目标自身进动来等效散射中心的运动,据此所得结论具有一定局限性.本文揭示了中段目标自身进动与散射中心运动的异同,综合考虑了实际散射中心的非理想散射现象和遮挡效应,建立了基于非理想散射中心的中段进动目标回波模型,并利用仿真实验分析了不同进动参数对时频特性的影响,通过暗室进动实验证明了本文结果的正确性.Conventional studies on characteristics of micro-motion targets with precession in ballistic midcourse usually regard the scattering centers of targets as ideal scattering centers,while the motions of practical scattering centers are equivalent to the precession of targets,based on which the educed conclusions usually are of certain limitations.This paper reveals the differences between motions of the target and its equivalent scattering centers.By considering the non-ideal scattering phenomena of practical scattering centers as well as their shielding effects,a new radar echo model of midcourse targets with precession is established based on non-ideal scattering centers.The influence of precession parameuers upon the time-frequency characteristics is analyzed via a set of simulations,while the correctness of the results is validated by experiments in anechoic chamber.

关 键 词：弹道中段 非理想散射中心 微动 

分 类 号：TN95[电子电信—信号与信息处理]