基于DBF技术的高分辨率宽测绘带星载SAR系统研究  

Analysis on High Resolution Wide Swath Space-borne SAR System Based on DBF Technique

作　　者：刘亚东[1] 陈倩[2] 

机构地区：[1]北京空间飞行器总体设计部,北京100094 [2]中国科学院电子学研究所,北京100190

出　　处：《航天器工程》2013年第4期23-29,共7页Spacecraft Engineering

基　　金：国家863计划(2011SQ701000)

摘　　要：针对星载合成孔径雷达(SAR)系统高分辨率与宽测绘带两个核心成像指标之间的矛盾,分类研究了若干适用于不同应用需求的基于数字波束形成(DBF)技术的典型高分辨率宽测绘带(HRWS)星载SAR系统,包括超高分辨率、中等分辨率和超宽测绘带。总结出智能化多孔径天线技术、方位向多通道预处理技术、距离向实时DBF技术和多通道SAR数据压缩技术等,作为未来HRWS星载SAR发展的关键技术。In order to deal with inherent contradiction between the geometric resolution and width in conventional space-borne SAR （synthetic aperture radar）, this paper investigates several HRWS （high resolution wide swath） space-borne SAR systems based on DBF （digital beam- forming） technique, including ultra-high resolution, medium resolution, and ultra-wide swath. In addition, this paper proposes some key techniques for the development of DBF HRWS SAR, including SMART （smart multi-aperture radar technique）, multi-channel preprocessing technique in azimuth, real-time digital beam-forming in elevation, and multi-channel SAR data compression technique.

关 键 词：星载SAR 高分辨率宽测绘带 数字波束形成 

分 类 号：TN957.52[电子电信—信号与信息处理]