方位维逆合成孔径雷达(ISAR)运动补偿成象中的预加处理

PREPROCESSING FOR ISAR MOTION COMPENSATION AND IMAGING IN THE CORSS RANGE

在方位维逆合成孔径雷达（ＩＳＡＲ）运动补偿成象中，为了获得方位维的高分辨力，需要处理的数据量很大。预加处理首先对原始数据进行频移和滤波，然后由滤波后的数据进行抽取，从而大大压缩了所需处理的数据，减小了运动补偿和成象的计算量，提高了成象处理速度。

In order to obtain a high cross range resolution, a great number of data need to be processed for inverse synthetic aperture radar (ISAR) motion compensation and imaging in the crossrange. The preprocessing compresses the data by frequency shifting, filtering and decimation. As a result, the computational load of motion compensation and imaging is reduced, which is favorable to real time image formation. The processing results of the electromagnetic simulated data and the live data of the narrowband coherent radar are given, which show that the preprocessing is correct and effective.