DRM广播外辐射源雷达模拟信号源设计  

Simulated Transmit Signal Source for HF Passive Radar Based on DRM Signal

作　　者：张德磊[1] 白雪杨[1] 唐雄[1] 万显荣[2] 

机构地区：[1]中国电子科技集团公司第二十八研究所,江苏南京210007 [2]武汉大学电子信息学院,湖北武汉430079

出　　处：《无线电通信技术》2013年第4期56-59,共4页Radio Communications Technology

摘　　要：DRM数字调幅广播在全球获得蓬勃发展,但目前可收听时段较为有限。为开展DRM新体制外辐射源雷达预研的需要,给出了一种DRM外辐射源雷达模拟信号源的软硬件实现方法。基于DRM信号结构分析了基带信号的产生和接收信号的数学模型;介绍了硬件平台结构、实现方法和工作流程,并通过双通道合成输出,成功模拟了直达波与目标回波信号;通过后续信号处理准确地提取了目标信号的时延多普勒信息。试验结果表明,模拟信号源能够满足外辐射源雷达的预研需求,为基于实测数据的目标提取等算法奠定了基础。Digital AM broadcasting is developing rapidly in the world.However,the radio illuminating time is limited in China.In order to pre-research the HF passive radar based on this type of signal,the paper gives the realization of software and hardware for DRM RF signal generator.Firstly,the paper analyses the generation of the baseband signal and the simulation of multipath signal based on the structure of DRM.Secondly,the paper introduces the structure of hardware platform,implementation method and the workflow of system which can emulate direct path and simulated target signal through dual-channel synthetic output.Finally,target Doppler and delay are extracted exactly through the latter signal processing.The result shows that this signal generator can meet the demand of the pre-research,and lay a foundation for the signal processing algorithm based on experimental data.

关 键 词：外辐射源雷达 DRM数字调幅广播 高频雷达 合成信号源 

分 类 号：TN958.97[电子电信—信号与信息处理]