摘要
提高雷达对微弱目标探测能力的主要方法是增加积累时间.根据传统PD雷达的设计原则,在相参积累时间内,目标的距离走动不能超过半个距离单元,也就是说相参积累时间受限于目标运动.对于高距离分辨雷达或观测高速目标的雷达系统,这种限制是很难满足的.本文提出一种基于keystone变换的运动补偿方案,可以在没有目标运动速度信息条件下校正距离走动,从而使积累时间不再受目标运动的限制.
The improvement of the capability to detect moving target with very small radar signature is usually realized by long term accumulation.According to the design principle of conventional PD （Pulse Doppler） radar,target＇ s range migration can＇ t exceed half of the range resolution cell in coherent integration time, which means that the accumulation time is restrained by target＇ s motion. For high range resolution radar or the radar system focusing on the detection of fast moving targets,such a restriction is difficult to satisfy.In this paper, a novel motion compensation method based on keystone transform is presented, which can correct range migration without the exact value of target velocity,and as a result,make the accumulation time free of the restriction due to target motion.
出处
《电子学报》
EI
CAS
CSCD
北大核心
2005年第9期1675-1678,共4页
Acta Electronica Sinica
