一种适于机载前斜视SAR成象处理的Chirp　Scaling算法  

An Extended Chirp Scaling Algorithm for Airborne Squint SAR Processing

作　　者：黄永红[1] 毛士艺[1] 

机构地区：[1]北京航空航天大学电子工程系

出　　处：《电子学报》1996年第3期37-41,共5页Acta Electronica Sinica

摘　　要：ＣｈｉｒｐＳｃａｌｉｎｇ算法是一种高效、高精度的ＳＡＲ成象处理算法，算法解决了在宽天线波束或者天级高斜视角情况下获得高分辨力图象的问题。本文在ＣｈｉｒｐＳｃａｌｉｎｇ算法的基础上，提出采用新的结构和新的相位函数来接纳机载ＳＡＲ成象处理所需的运动补偿相位，使得ＣｈｉｒｐＳｃａｌｉｎｇ算法成为机载前斜视ＳＡＲ的一种实用的、高效算法．本文给出了一幅采用该算法处理的德国宇航院（ＤＬＲ）的Ｅ－ＳＡＲ图象，证实了该算法的可行性。The Chirp Scaling(CS) algorithm is an dfficient and high resolution imaging algorithm used in airborne SAR with wide antenna beamwidth or with very high squint angle. Based on the CS algorithm,this paper proposes a new extended chirp scaling(ECS) algorithm,which modifies the phase functions and processing structure comparing CS algorithm in order to accommodate the motion compensation phase needed in the airborne SAR to obtain the high resolution image even for the aircraft antenna with very high squint. The E-SAR raw data obtained by Gerospace Establishment(DLR) is processed to confirm the validity of the ECS algorthm.

关 键 词：机载前斜视 SAR 成象处理 雷达 

分 类 号：TN959.73[电子电信—信号与信息处理]