电子学报Issue(10)：1975-1982,8.DOI:10.3969/j.issn.0372-2112.2013.10.017
一种平行航线双基聚束式FMCWSAR的两步处理方法
A Two-Step Processing Approach for Parallel Bistatic Spotlight FMCW SAR Focusing
摘要
Abstract
This paper establishes the received signal model of parallel bistatic spotlight SAR adopting frequency modulated continuous wave (FMCW ) ,and analyzes the affect of doppler frequency shift introduced by platform′s continuous motion while radar transmitting and receiving signals .Then using the concept of instantaneous frequency and through introducing the parameters , i .e .the sum and difference of the closest slant range ,and the half quasi bistatic angle ,the received signal expression in two dimen-sional wave-number domain is deduced .Based on this ,a two-step processing approach for parallel bistatic spotlight FMCW SAR fo-cusing is presented ,which uses azimuth pre-filtering step to overcome azimuth spectral folding phenomenon first .Following this op-eration ,a second residual focusing step is applied to carry out doppler frequency shift compensation and the bistatic frequency scaling processing .Meanwhile ,the time frequency relations changing from each stage of azimuth pre-filtering are analyzed in detail .Simula-tion data processing verifies the analysis and the proposed algorithm .关键词
调频连续波/平行航线双基聚束式SAR/多普勒频移/瞬时频率/方位预滤波/残余聚焦Key words
frequency modulated continuous wave(FMCW)/parallel bistatic spotlight SAR/Doppler frequency shift/instan-taneous frequency/azimuth pre-filter/residual focusing分类
信息技术与安全科学引用本文复制引用
梁毅,李燕平,邢孟道,保铮..一种平行航线双基聚束式FMCWSAR的两步处理方法[J].电子学报,2013,(10):1975-1982,8.基金项目
国家自然科学基金 （）
