COMPENSATION OF SCATTERERS MIGRATION IN ISAR IMAGING
逆合成孔径雷达成像中散射点走动的校正

Range-Doppler method is the most common method in ISAR imaging. To obtain radar image of a target, certain angle of the target with respect to Radar Light Of Sight (RLOS) during the coherent integration interval is required. In some case, there will exist scatterers' migration. Actually, scatterers' Migration Through Resolution Cell (MTRC) occurs inevitably in higher resolution radar image, which will result in the point-spread function broadening and image resolution decreasing. The scatterers' migration is discussed in the paper and a simple and efficient method is proposed to compensate MTRC. Compensation results of the simulated data and the real data collected in a microwave anechoic chamber show that the resolution of the final radar image is improved.