利用北斗反射信号探测目标的初步实验  

A Preliminary Experiment of Target Detection Based on Beidou Satellite Reflected Signal

作　　者：裴博宇 严颂华[1] 王泉德[1] 陈能成[2] 

机构地区：[1]武汉大学电子信息学院,湖北武汉430072 [2]武汉大学测绘遥感信息工程国家重点实验室,湖北武汉430079

出　　处：《雷达科学与技术》2015年第6期615-621,626,共8页Radar Science and Technology

基　　金：国家重点基础研究发展计划课题(No.2011CB707101);中央高校基本科研业务费专项资金(No.2042015gf0018);"十二五"国家863课题(No.2012AA091701)

摘　　要：随着北斗系统的逐步完善,利用北斗导航卫星信号的反射信号来探测目标将可实现全球范围的监测,这种方法具有被动接收、成本低等特点。但是北斗导航信号本身是为传输导航电文和定位而设计,所以用于目标的探测还有需要研究的地方。利用北斗系统的地球静止轨道GEO卫星信号,设计了一套利用软件接收机来实现目标探测的方案,采用开环接收反射信号,解决了接收机对反射的微弱信号进行常规捕获和跟踪不适用的问题。阐述了利用北斗信号探测目标的基本原理,给出了采用中频采样器和软件接收机的软硬件系统架构,并进行了楼宇反射实验和长江大桥反射实验。实验结果证明了提出的目标探测和开环软件接收机方案的正确性。With the Beidou navigation system getting perfect,using the reflected signal of Beidou navigation satellite signal to detect target will be able to achieve global monitoring.This method has the characteristics of passive receiving,low cost,etc.But the Beidou navigation signal is designed to transmit the navigation message and position,so it is necessary to study for target detection.Based on the Beidou system GEO satellite signal,a scheme for target detection using software receiver is designed.Using the open-loop to receive the reflection signals solves the problem of receiver not suitable for conventional weak signal capturing and tracking.The basic principle of detecting target by Beidou signal is described and the software and hardware system architecture with intermediate frequency sampler and software receiver is presented.The building reflection experiment and the Yangtze river bridge reflection experiment are conducted.The experimental results prove the validity of the proposed target detection and the openloop software receiver scheme.

关 键 词：北斗导航系统 反射信号 目标探测 开环软件接收机 

分 类 号：TN91[电子电信—通信与信息系统] TN967.1[电子电信—信息与通信工程]