机载P波段UWB SAR高效成像方法研究  

High-efficiency and high-resolution imaging algorithm for airborne P band UWB SAR

作　　者：董臻[1] 梁甸农[1] 

机构地区：[1]国防科学技术大学电子科学与工程学院,湖南长沙410073

出　　处：《系统工程与电子技术》2008年第12期2376-2379,共4页Systems Engineering and Electronics

摘　　要：针对机载P波段超宽带合成孔径雷达高效成像问题,改进了距离-多普勒算法。不仅能补偿高阶相位,而且通过chirp-z变换完成距离迁移校正,避免了经典RD算法的插值运算,所以是一种高效的高分辨成像算法。分析了如何划分子测绘带以便分别处理,以抑制高阶相位误差的影响。实际机载数据的处理结果证明了算法的有效性。To study the problem of high-efficiency and high-resolution imaging algorithm for airborne P band UWB SAR, a modified range-Doppler algorithm is proposed. It can not only compensate the high order phase error, but also correct the range cell migration with a chirp-z transform. It is a high-resolution imaging al- gorithm with high-efficiency because it does not need interpolation. The principle of determining the width of sub-swath is discussed to suppress the high order phase error. The effectiveness of the method is also verified with the real data from an airborne P band UWB SAR.

关 键 词：超宽带合成孔径雷达 高阶相位补偿 距离迁移校正 CHIRP-Z变换 子测绘带 

分 类 号：TN958[电子电信—信号与信息处理]