基于非合作捷变频雷达的微弱目标检测算法

摘要

The frequency agility technology is widely employed in radar system design to increase the anti-jamming ability and the detection probability,however,the signal coherence is damaged.The improvement of the ability to detect weak target is usually realized by long time accumulation,but it can lead to the target’s range migration.As a result,the coherent integration method is not applicable.In this paper,a novel weak target detection method is presented,which can be applied in the non-cooperative frequency agile radar.This method can deal with the phase jitter of echo efficiently and the coherent integration is realized in this situa-tion.Numerous experiments verify that this method is effective in weak target detection.%目前，频率捷变技术广泛应用在雷达系统设计上，用来提高抗干扰能力和检测概率，这使得回波信号的相参性难以保证。同时，增加积累时间的方法通常用于提高雷达对微弱目标的检测能力，但是长时间积累容易引起距离走动。以上因素导致了回波信号的能量无法得到有效积累。提出的一种基于非合作捷变频雷达的微弱目标检测算法，能够有效解决捷变频回波信号长时间积累时出现的相位抖动问题，从而实现相参积累。仿真实验证明了该方法对于微弱目标检测的有效性。