基于长时间积累的低可观测目标检测方法

摘要

The effective long time integration of radar signal is a common method for the detection of low observable tar-gets,which could greatly improve the SNR without changing the system hardware,thus to increase the power of the radar. How-ever,during the long integration time,the rapid mobility objectives may bring about the problems of range migration,Doppler spread or some other issues,and the detection performance would be seriously affected. To solve these problems,a method of doing coherent integration in segment then doing noncoherent integration between segments,it could effectively correct range migration while avoiding Doppler spread,which has good performance.%雷达信号的有效长时间积累是检测低可观测目标的一种常用方法，可以在不改变系统硬件的同时大大提高信噪比，以增加雷达威力。但是，在较长的积累时间下，快速机动目标有可能会带来距离走动、多普勒扩散等问题，严重影响检测性能。为解决上述问题，提出了一种段内相干积累段间非相干积累的方法，避免出现多普勒扩散，有效地矫正了距离走动，具有良好的性能。