星载宽测绘带合成孔径雷达成象处理  

SPACEBORNE WIDE SWATH SYNTHETIC APERTURE RADAR SCANSAR SIGNAL PROCESSING

作　　者：林榕[1] 周荫清[1] 

机构地区：[1]北京航空航天大学电子工程系

出　　处：《北京航空航天大学学报》1994年第1期13-20,共8页Journal of Beijing University of Aeronautics and Astronautics

摘　　要：波束扫描合成孔径雷达（ＳＣＡＮＳＡＲ）是为了满足星载合成孔径雷达宽测绘带的要求而提出的，本文主要研究ＳＣＡＮＳＡＲ成象处理．ＳＣＡＮＳＡＲ的工作原理、信号格式、信号结构和信号参数限制的深入分析是成象处理研究的基础．成象处理算法包括块数据成象算法和块图象拼接算法两部分．频谱分析法和时域频域混合相关法被用于块数据成象，块图象的拼接是利用时间关系剪裁块图象再顺次拼接．完整的。卞算机仿真验证了本文提出的ＳＣＡＮＳＡＲ信号格式和成象算法的可行性，它包括ＳＥＡＳＡＴ－Ａ原始数据重格式化及ＳＣＡＮＳＡＲ成象处理两部分仿真工作．Scan-beam synthetic aperture radal (SCANSAR) is proposed to solve the problem thatSAR is constrained to a narrow sWath by ambiguity limitation. This paper mainly engaged inSCANSAR imaging. SCANSAR operation principle, signal structure, signal parameters anddata format are studied carefully before imaging processing is taken into considersation. Sig nal processing includes the block data imaging algorithm and the subimages mosaicing algo rithm. In block data imaging. two kinds of azimuth algorithm. spectrum analysis algorithmand time domain and frequency domain hybrid algorithm. are discussed. In subimages mosaicing. time relation is utilized to clip the subimages and combine them sequentially. Computersimulation. which includes reformatting SEASAT raw data to SCANSAR data. processingblock data and combining the subimages to a whole image. verifies the proposed signal formatand imaging algorithm.

关 键 词：测绘雷达 合成孔径雷达 图象处理 

分 类 号：TN959.3[电子电信—信号与信息处理]