Abstract: As one of the classical algorithms for clutter suppression in radar field,Displaced Phase Center Antenna(DPCA) Processing can be implemented easily and simply.In this paper,two kinds of raw data range DPCA algorithms-time range DPCA and Doppler range DPCA to use in bi-channel SAR/GMTI system are studied.The model of point target return is derived;principles of two methods are introduced;the applications of Doppler range DPCA technique is studied and the corresponding results of simulated based on the simulated data are put forward.