摘要
针对地球同步轨道合成孔径雷达(GEO SAR)"停走"假设失效,回波信号距离和方位二维空变性严重问题,本文引入考虑"停走"假设误差的回波信号模型,提出了一种适用于GEO SAR的改进ωk算法,该算法分别在距离维和方位维采用新的频率轴映射和非均匀快速傅里叶变换(NUFFT)去除了距离向和方位向信号的耦合,实现了适应距离和方位二维空变的方位向压缩.仿真实验验证了所提算法的有效性.
Considering the characteristic of the GEO SAR （geosynchronous synmeuc aperture radar） , a new slant range model without the＂stop-go＂ assumption was established. Meanwhile, an advanced ωk algorithm overcoming the 2-D space-variant was proposed for GEO SAR, this algorithm adopted a new frequency axis mapping and NUFFT in both range and azimuth direction to decrease the 2-D coupling. Finally, effectiveness of the algorithm was validated by the simulations.
作者
张欣
黄普明
王伟伟
ZHANG Xin HUANG Pu-ming WANG Wei-wei(China Academy of Space Technology, Xi＇an, Shanxi 710000, China)
出处
《北京理工大学学报》
EI
CAS
CSCD
北大核心
2017年第7期765-770,共6页
Transactions of Beijing Institute of Technology
基金
国家自然科学基金资助项目(61461007)
