【摘要】 对于逆合成孔径雷达(ISAR)成像,运动补偿是其关键,而包络对齐则是运动补偿的基础,现在广泛采用的方法是包络相关法,由于目标上散射点的闪烁等原因,相关法对齐时常会有较大的误差。本文分析了该方法存在的问题,提出了改进措施,同时还提出了用最小熵进行包络对齐的新方法,使对齐质量明显提高,大量实测数据验证了新方法的有效性。更多还原

【Abstract】 The envelope correlation algorithm is widely used in range alignment of ISAR motion compensation, however, this method often has error accumulation, and what is more, a jump error will occur when the reflection of target has strong scintillation. To reduce the error of range alignment, a minimum entropy criterion of range alignment in ISAR compensation is proposed. Using this method the range bin can be aligned correctly, which is verified by real radar data.更多还原