Robust Adaptive Ground Moving Target Indication Technique Applied to Distributed Spaceborne SAR System
Through formation flying, distributed SAR satellites system can increase the number of spatial degree-of-freedoms (DOFs) and provide flexible multi-baselines for SARGMTI(ground moving target indication), while improving the system performance. This letter proposes a robust optimum adaptive clutter suppression technique for SAR-GMTI applied to the distributed spaceborne synthetic aperture radar (SAR) systems. Some realistic problems related to the implementation of the processor are investigated, which include decorrelations from multiplicative speckle noise and moving target steering vector mismatch. Diagonal Loading (DL) techniques is resorted to improve the estimation of clutter statistics in the presence of multiplicative speckle noise. A prior information, like road network information, is integrated into the optimum adaptive processor to reduce moving target steering vector mismatch. Simulation experiments and performance analysis demonstrate the effectiveness and robustness of the proposed processor.
distributed spaceborne SAR GMTI robust optimum adaptive processor (OAP) multiplicative speckle noise diagonal loading a prior information)
Wei Pan Bin Cai
Computer Science and Technology School China West Normal Nanchong City, China Institute of Telecommunication Engineering AFEU Xian, China
国际会议
太原
英文
289-293
2010-10-22（万方平台首次上网日期，不代表论文的发表时间）