利用一发多收的双基SAR构型解多普勒模糊成像  

Using STMR Configuration for Doppler Ambiguity Resolving Bistatic SAR Imaging

作　　者：张磊[1] 贺柏森[1] 邢孟道[1] 保铮[1] 

机构地区：[1]西安电子科技大学雷达信号处理重点实验室,西安710071

出　　处：《电子与信息学报》2009年第9期2044-2047,共4页Journal of Electronics & Information Technology

基　　金：新世纪优秀人才支持计划(NCET-06-0861)资助课题

摘　　要：该文以方位平移不变的双基SAR为研究对象,分析了双基回波多普勒的距离空变性,提出了一种考虑多普勒空变性的双基解多普勒模糊算法。解模糊过程中利用数值计算得到不同距离对应各个多普勒频点模糊分量的导向矢量,然后进行空域滤波实现全多普勒谱的重构。最后结合已有的双基成像算法实现大场景高分辨率成像。数值仿真验证了算法的有效性。This paper focuses on the translation-invariant bistatic SAR Doppler ambiguity resolving by using Single-Transmitter-Multiply-Receivers （STMR） mounted on different platforms. The range dependent Doppler in the bistatic configuration is analyzed, based on which a bistatic Doppler ambiguity suppression algorithm is proposed. The approach obtains the range dependent steering vectors of ambiguous signM components in the same Doppler bins by numerical calculation, and the spatial domain filtering is used to reconstruct the full bandwidth Doppler spectrum. Finally, the available bistatic imaging algorithms can be used to obtain the wide swath and high resolution SAR image. Simulation confirms the validity of the approach.

关 键 词：双基SAR 多普勒解模糊 单发多收 导向矢量 

分 类 号：TN958[电子电信—信号与信息处理]