旋转式合成孔径雷达干涉成像方法  

Research on interferometric imaging for rotor synthetic aperture radar

作　　者：杨科[1] 廖桂生[1] 徐青[1] 

机构地区：[1]西安电子科技大学雷达信号处理国家重点实验室,陕西西安710071

出　　处：《西安电子科技大学学报》2014年第4期1-5,30,共6页Journal of Xidian University

基　　金：国家973计划资助项目(2011CB707001);国家自然科学基金青年科学基金资助项目(61101242);中央高校基本科研业务费专项资金资助项目(K50511020009)

摘　　要：为满足复杂低空环境三维成像需求,构建了旋转式合成孔径雷达干涉成像模型.针对不同高度的系统平台存在旋转轴中心偏移问题,采用旋转轴和场景整体平移的方法,将轴偏移等效为场景位置移动,进而分析场景位置变化对方位带宽和干涉相位的影响,获取斜距差和偏移量的关系式,最终通过构建补偿函数来实现附加相位补偿.仿真结果表明,该方法能够有效地消除轴偏移的影响,并能实现场景高程精确测量.To achieve the perception of 3D imaging in the complex environment in low-altitude space,an interferometric imaging model of rotor synthetic aperture radar （ROSAR） is established.The rotary axes of the platforms in different altitudes are shifted.By moving the rotary shaft and the observed scene holistically,the effects of the rotary shaft offset are equivalent to the changes of the scene position.Meanwhile,by analyzing the effects of the scene movement on the azimuth bandwidth and interferometric phase,we obtain the relation between slant range difference and offset amount.And then construct a compensation function to correct the additional phase.Simulation results demonstrate that this method can not only remove the effects of rotary shift offset effectively but also measure the height of the scene accurately.

关 键 词：旋转式合成孔径雷达 干涉成像 旋转轴偏移 补偿函数 

分 类 号：TN957.52[电子电信—信号与信息处理]