摘要
逆合成孔径雷达(Inverse Synthetic Aperture Radar,ISAR)利用宽带信号获取高的距离向分辨率,利用多普勒原理获取高的方位向分辨率,从而具备对运动目标的高分辨成像能力。与光学成像设备相比具有受天气影响小、全天候、全天时的特点,适合在恶劣环境下对目标成像及目标特征提取与识别。针对车辆监控系统对成像雷达的实际需求,本文设计并实现了Ka波段FMCW逆合成孔径雷达系统,介绍了雷达的基本构成,成像算法,最后对轻轨列车和北四环行车进行成像,验证了系统的有效性。此系统可与光学设备复合使用,从而提高在不同环境下的运动目标监测与识别能力。
Inverse Synthetic Aperture Radar(ISAR)uses wide band signals to obtain the resolution of range and Doppler principle to obtain the azimuthal resolution of moving targets.Compared with optical imaging equipment,it is less affected by the weather and can be used all weather and all day.It is suitable for the target imaging,extraction and recognition under harsh environments.In view of the actual need of vehicle monitoring system for imaging radar,this paper introduces Ka band FMCW inverse synthetic aperture radar system,the basic structure and imaging algorithm,and finally gives the imaging results of the light rail train and the running vehicles on North Fourth Ring Road of Beijing.The comparison results between optical instrument and radar prove that the system is effective.The system can be used in combination with optical equipment to improve the ability to monitor and recognize moving targets in different environments.
作者
任佳伟
张祥坤
邵泽龙
李迎松
REN Jia-wei;ZHANG Xiang-kun;SHAO Ze-long;LI Ying-song(National Microwave Remote Sensing Laboratory,Beijing 100190,China;University of ChineseAcademy of Sciences,Beijing 100190,China;Harbin Engineering University,Harbin 150001,China)
出处
《电子设计工程》
2019年第8期179-183,共5页
Electronic Design Engineering
关键词
调频连续波
逆合成孔径
车辆监测成像
系统设计
frequency modulation continuous wave
inverse synthetic aperture
vehicle monitoring imaging
system design
