大斜视角SAR的方位多级重叠子孔径算法  

Azimuth Multiple Tiered Subaperture Algorithm for High Squint SAR

作　　者：陈旭[1] 张大炜[1] 

机构地区：[1]中国电子信息产业集团公司,北京100846

出　　处：《无线电通信技术》2013年第4期60-63,共4页Radio Communications Technology

摘　　要：方位重叠子孔径算法(AOSA算法)能够补偿SAR"斜视最小化"带来的空变相位误差。基于AOSA算法,提出了一种方位多级重叠子孔径算法(AMTSA算法),通过将方位数据分为多级重叠子孔径从而补偿这些相位误差。分析了该算法的基本原理、应用范围和有效性约束条件。分析结果表明,AMTSA算法在一级子孔径的情况下,将蜕变成AOSA算法,最后仿真结果验证了AMTSA算法对高分辨率、大斜视角SAR成像的有效性。The azimuth overlapped subaperture algorithm（AOSA） can be used to compensate for the space variant phases introduced by the＂squint minimization＂.An azimuth multiple tiered subaperture algorithm（AMTSA） is proposed to compensate for these phases in Doppler frequency domain by dividing the azimuth data into multiple tired subapertures.Analysis shows that the AMTSA can be degraded to the AOSA when only one tiered subaperture is applied.Numerical results confirm the effectiveness of the algorithm in high-resolution,highly squinted SAR.

关 键 词：大斜视角合成孔径雷达 方位多级重叠子孔径算法(AMTSA) 空变相位误差 

分 类 号：TN957[电子电信—信号与信息处理]