天基稀疏孔径实现地面运动目标指示（GMTI）具有很大吸引力，然而天基稀疏阵通常存在距离、多普勒和角度模糊。文中研究模糊对空时自适应处理和GMTI性能的影响，理论分析与仿真结果表明：距离模糊会影响最小可识别速度，引起输出SINR损失；多普勒模糊和角度模糊不但产生测速旨区和输出SINR损失，还导致虚似目标和同一目标被重复检测，增加虚警概率。

Using space based sparse array for ground moving target indication is attractive.Unfortunately,range,Doppler and angle ambiguities usually occur with space based sparse array.The effects of radar ambiguities on the performance of STAP and GMTI are the focus of this paper.Theoretical analysis and experimental results show that range ambiguity degrades the minimum identifiable velocity(MDV) and output SINR.Doppler and angle ambiguities not only have significant effect on the blind zone size and output SINR,but also bring in false targets and multiple detections of the same moving target,increasing the false alarm rate.

TN958

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