宽带变多通道窄带信号检测高速目标算法

High speed targets detection algorithm based on multichannel narrow-band signal by wide-band signal decomposed

高速目标的宽带信号回波产生的目标距离走动会导致传统动目标检测相参积累信噪比损失较大.Keystone变换以及相关改进算法虽然能够校正目标距离走动,但该类算法需要预先估计目标较为精确的多普勒速度,难于应用到实际工程中.文中采用一种宽带线性调频信号变多通道窄带信号处理方法,在没有目标速度先验知识的情况下,能够对高速目标回波信号能量进行有效积累,从而提高目标检测性能.给出了算法框图,经仿真验证该方法有效.

The target range migration may decrease the performance of the detection（MTD） coherent integration, which means that the accumulation time tion. The Keystone transform can correct target range migration, but it need conventional moving target is restrained by target mo- to accurately estimate the target velocity, which is difficult to satisfy. In this paper, an algorithm of the wide-band linear frequency modulation signal decomposed into narrow-band multichannel signal to detect high speed targets is pres- ent, which does not require prior knowledge of the speed of high-speed moving target and can improves the wideband radar performance of detection of high speed target. The simulation results demonstrate the a- vailability of the proposed method.