摘要
频率步进合成高分辨雷达体制受目标径向运动速度的影响极大,为了获取目标准确的高分辨距离像,需要做运动补偿。目标运动速度的估计精度直接决定速度补偿效果。首先分析了顺序跳频和随机跳频两种高分辨信号的特点,然后概述了相参合成处理实现高分辨的方法,最后研究了目标运动对这两种信号合成一维距离像的影响,并在此基础上提出了一种新波形的设计方法,从而大大提高了目标速度的估计精度。
Target velocity has a big negative effect on synthetic high resolution range profiles of step frequency radar. In order to obtain precise profiles, velocity compensation is indispensable. The compensation result is determined by the precision of velocity estimation. In this paper, the characteristics of the two step frequency signals, ordered stepped and random stepped, are analyzed. Coherent synthetic signal processing methods for acquiring high range resolution profiles are introduced. Finally, the effects of target velocity on one - dimensional high range resolution profiles synthesized by fie two signals are discussed. On this basis, a novel waveform design is proposed, thus greatly improving the precision of velocity estimation.
出处
《电讯技术》
2008年第4期49-52,共4页
Telecommunication Engineering
关键词
高分辨雷达
频率步进
变波形
运动补偿
速度估计
high range resolution radar
stepped frequency
waveform switch
velocity compensation
velocity estimation
