Improvedforward—lookingimagingmethodforairbornearrayFMCWSAR  

作　　者：侯海平[1,2] 曲长文[2] 杨俭[2] 苏峰[2] 

机构地区：[1]91039部队,北京102401 [2]海军航空工程学院电子信息工程系,山东烟台264001

出　　处：《电波科学学报》2011年第5期944-950,共7页Chinese Journal of Radio Science

基　　金：“泰山学者”建设工程专项基金资助

摘　　要：机载阵列前视合成孔径雷达（SAR）信号模型中忽略载机速度会影响成像。针对该问题，在调频连续波（FMCW）SAR信号模型中考虑了载机速度，分析了栽机速度的影响和裁机连续运动引入的多普勒频率偏移的特点，结合FrequencyScaling算法，研究了机载阵列FMCWSAR前视成像。成像仿真和性能参数分析表明：改进方法可精确实现载机运动条件下的FMCWSAR前视成像。Imaging may be affected if aircraft velocity is ignored in signal model of airborne array forward-looking synthetic aperture radar（SAR）. To solve this problem, aircraft velocity is considered in signal model of frequency modulated continuous wave（FMCW）SAR. Effect of aircraft velocity and characteristic of Doppler frequency shift resulting from aircraft continuous motion are analyzed. Combining with frequency scaling algorithm, forward-looking imaging method for airborne array FMCW SAR is studied. Imaging simulation and parameter performance analysis show that the proposed method can realize forward-looking imaging accurately for FMCW SAR when aircraft is moving.

关 键 词：SCALING算法 成像仿真 合成孔径雷达 信号模型 连续运动 调频连续波 频率偏移 性能参数 

分 类 号：TN957.5[电子电信—信号与信息处理]