从多散射中心目标的回波模型入手，分析了无载波超宽带雷达目标运动引起的多普勒效应，得出了无载波超宽带雷达多普勒效应的时域表现形式-多普勒时移，对一种基于多普勒时移的时域多普勒处理器进行了Matlab仿真。结果表明：利用多普勒时移可有效检测出目标速度，并且不存在盲速。

Based on the radar return model of the target with a collection of scattering centers,target motion induced Doppler effect of UWB (ultra wideband) radars is analyzed.Doppler time shift,a time domain expression of Doppler effect in carrier free UWB radars is proposed.A simulation is carried out for a kind of time domain target motion Doppler processor based on the Doppler shift,with the result that target velocities can be detected by estimating the Doppler time shifts.As an advantage, there is no blind velocity phenomenon which exists in conventional carrier radars.

TN957.51