电讯技术Issue(9)：1031-1035,5.DOI:10.3969/j.issn.1001-893x.2015.09.015
高帧率步进频穿墙成像雷达扫频方法
A Sweep Frequency Method for High Frame Rate Stepped-frequency Through-Wall Imaging Radar
摘要
Abstract
Stepped-frequency is a common waveform used in through-wall imaging radar( TWIR) . Tradi-tional stepped-frequency TWIR,which uses phase-locked loop( PLL) frequency synthesis technology,has a long frequency hopping time and low frame rate. It’ s difficult to meet the real time imaging demand of TWIR. To solve this problem,a novel scanning scheme is proposed in this paper,which can realize the ad-justable control of scanning mode with Field Programmable Gate Array( FPGA) . This scheme can evidently enhance the frame rate of TWIR without affecting echo waveform and imaging results. With step size equal to 2 MHz and frequency range equal to 2. 5 GHz,the actual frame rate of imaging can reach 14 Hz. The re-quirements of real time imaging can be satisfied to some extent. The feasibility of proposed approach has been proved through experiment.关键词
穿墙成像雷达/实时成像/步进频/锁相合成/高帧率Key words
through-wall imaging radar/real time imaging/stepped-frequency/PLL frequency synthesis/high frame rate分类
信息技术与安全科学引用本文复制引用
张宝伟,朱国富,陆必应..高帧率步进频穿墙成像雷达扫频方法[J].电讯技术,2015,(9):1031-1035,5.基金项目
国家自然科学基金资助项目(61271441,61372161)Foundation Item:The National Natural Science Foundation of China(No.61271441,61372161) （61271441,61372161）
