一种改进的逆合成孔径雷达运动补偿法

运动补偿是逆合成孔径雷达成象处理的关键，它包括距离对准和相位补偿两个环节，现有的ＩＳＡＲ运动补偿方法都是将距离对准和相位补偿分开进行的，本文在ＩＳＡＲ距离对准频域法的基础上，提出了一种同时距离对准和相位补偿的ＩＳＡＲ运动补偿法，与其他方法相化，它能简化运动补偿环节，减少运动补偿计算量，文中证明所采用的相位补偿法与多普勒中心跟踪法是等效的，ＩＳＡＲ外场实测数据和微波暗室数据的运动补偿和成象结果验证了

An Improved Motion Compensation Approach of Inverse Synthetic Aperture Radar

Motion compensation is crucial to image formation of inverse synthetic aperture radar (ISAR). It consists of two steps,that is range realignment and phase compensation.However, all the methods of motion compensation of ISAR available always carry out range realignment and phase compensation separately.In this paper,a motion compensation approach of ISAR is developed based on the frequency domain method of range realignment which is able to perform rangs realignment and phase compensation simultaneously. Consequently,the proposed approach can reduce the complexity and computational load of motion compensation of ISAR. We verify that the scheme of phase compensation is virtually equivalent to the track-Doppler-centroid method. The proposed approach was used to process the live data of ISAR and the real data of microwave anechoic chamber. The results show that the proposed approach is correct and effective.