Moving target detection for spaceborne MIMO-SAR based on interferogram

Influenced by radial velocity of moving target,a periodically modulated signal will be introduced into echo model of equivalent channel for spaceborne MIMOSAR.And there will appear the “spurious peaks” effect in azimuth image,which can make false alarm rate hi gher.Based on ATI interferogram,a moving target detection scheme for spaceborne MIMOSAR is proposed which needs not compensate error signal.Firstly,we can
adjust system parameters to lower the “spurious peaks” magnitude of moving target,and then use clutter to weaken “spurious peaks” interferometric phase via interferometry processing.Finally,jointed processing for amplitude and phase of ATI interferogram is used to realize moving target detection accurately.The numerical experiments are also provided to demonstrate the effectiveness of the proposed method.