一种用于微弱目标检测的帧间移位累加方法

New Inter-Frame Accumulation Method in Range-Doppler Domain for Dim Target Detection

提出一种用于微弱目标检测的距离-多普勒域帧间移位累加方法,即针对相对于雷达作径向匀速直线运动的目标,利用雷达回波数据的多普勒信息,预测目标的速度及其位置变化,并通过多帧信号的移位累加来提高信噪比,从而有效地检测弱小目标。该方法充分利用了目标信号帧间相关而噪声点帧间不相关的特点,能有效地降低虚警概率及漏警概率,提高对弱小目标的检测性能。

A new inter-frame accumulation method in range-Doppler domain for dim target detection is proposed. For the radial even speed linear motion target realitive to radar, this method uses Doppler information to predict the target speed and position, and improves SNR by inter-frame accumulations to detect the dim target effectively, and this method make full use of the correlation of target and uncorrelation of noise between frames. It can effectively reduce the false-alarm probability and false-dismissal probability, and can improve the detection performance for dim target.