国防科技大学学报2017，Vol.39Issue(5)：96-101,6.DOI:10.11887/j.cn.201705016
结合直达波补偿的星地双站SAR滑动聚束模式频域成像算法
Processing the sliding spotlight bistatic SAR combine with direct-path signal compensation in frequency domain
摘要
Abstract
In fixed-receiver bistatic SAR (synthetic aperture radar),the spacebome SAR was used as the illuminator.The direct-path signal and the backscattering echo were sampled,synchronized and focused by the receiver.The geometry of fixed receiver bistatic SAR was introduced.After the direct-path signal was used as reference signal for range match filtering,the spatial variation of chirp rate,range cell migration and twodimensional spectrum were analyzed.Based on azimuth preprocessing,direct-path signal compensation and nonlinear Chirp Scaling imaging algorithm,a new focusing algorithm was presented.Simulation results of point targets were presented to validate the feasibility and efficiency of the proposed method.This algorithm was also validated by the measured data of the HITCHHIKER system.关键词
双站合成孔径雷达/滑动聚束/接收站固定/直达波补偿Key words
bistatic synthetic aperture radar/sliding spotlight/fixed-receiver/direct-path signal compensation分类
信息技术与安全科学引用本文复制引用
闫飞飞,常文革,黎向阳,张启雷..结合直达波补偿的星地双站SAR滑动聚束模式频域成像算法[J].国防科技大学学报,2017,39(5):96-101,6.基金项目
国家自然科学基金资助项目(61501477,61201329) （61501477,61201329）
