机动目标一维距离像的展宽与补偿分析  

Expansion and Compensation Analysis of Range Profile for Maneuvering Targets

作　　者：李文臣[1] 王雪松[1] 王国玉[1] 

机构地区：[1]国防科技大学电子科学与工程学院,长沙410073

出　　处：《宇航学报》2008年第4期1364-1368,共5页Journal of Astronautics

基　　金：国家自然科学基金(60672033);装备预先研究项目(51309060305)

摘　　要：大加速度机动目标的宽带一维像会产生模糊,只有速度补偿很难很好地改善成像效果。针对机动目标一维距离像展宽和补偿进行研究,给出了机动目标宽带脉冲回波信号模型,提出了展宽系数来衡量频谱展宽,然后定量分析了目标运动速度和加速度对测距和展宽的影响,最后给出了速度和加速度补偿方法和机动目标测距表达式。实验结果表明速度和加速度补偿方法很好地解决了目标机动频谱展宽。The range profile of maneuvering targets with high acceleration is obscure, which is difficult to improve imaging effect via the velocity compensation. In this paper, the range profile expansion and compensation of maneuvering targets is studied, and the wideband pulse echo model of maneuvering targets is given. Spectral expansion coefficient（SEC） is proposed to measure spectral expansion, and then range measurement and spectral expansion effect by movement parameters are analyzed quantificationally. Finally, the compensation approach of the velocity and acceleration, and the range measurement expression are presented respectively. The simulation results show that the proposed compensation approach of the velocity and acceleration can resolve the spectral expansion of maneuvering targets.

关 键 词：一维距离像 频谱展宽系数 速度补偿 加速度补偿 机动目标 

分 类 号：TN957[电子电信—信号与信息处理]