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分析Burst工作模式星载SAR系统中,采用全孔径成像算法会产生周期性明暗条纹噪声的原因,提出一种简单高效的一维频域滤除算法,并给出包含该操作的改进距离多普勒成像算法流程。对于因雷达系统本身原因而产生的一些非周期不规则条纹噪声进行讨论,针对此类噪声提出一种二维频域区域滤波的算法。通过对实际星载SAR数据的处理,验证算法的有效性。
Analysis of Burst working mode in space-borne SAR system, the use of full aperture imaging algorithm will produce periodic dark and dark noise reasons, a simple and efficient one-dimensional frequency domain filtering algorithm is proposed, and includes the operation of the improved distance Doppler Le imaging algorithm process. Some non-periodic irregular fringe noise caused by the radar system itself is discussed. An algorithm of two-dimensional frequency domain filtering is proposed for such noise. By processing the actual spaceborne SAR data, the validity of the algorithm is verified.