Optimal polarimetric interferometry coherence analysis in detection and location of moving target with SAR

This paper mainly deals with the problem of the optimal polarimetric interferometry coherence in detection and location of moving target with SAR. The coherence is closely related with the estimated accuracy of the interferometric phase between the residual images which are obtained from clutter cancellation. A novel method for improving the estimated accuracy of the interferometric phase is presented. Using the echo model of moving target, the procedure of clutter cancellation in frequency domain is derived. The optimal polarimetric interferometry processing for residual images is proposed with detailed analysis. Finally, the interferometric coherences of the residual images with different polarization are analyzed by simulation to validate the theory.