摘要
DRM数字调幅广播作为取代传统中短波模拟调幅广播的新标准在全球获得迅猛发展,针对DRM广播新体制高频外辐射源雷达,首先参照DRM信号结构从理论上仿真研究了DRM信号的模糊函数特性,重点分析了模糊函数中副峰产生的机理并提出了副峰抑制的方法;然后结合我国首次获得的DRM外辐射源雷达实测数据处理对理论分析结果和副峰抑制方法进行了验证。结果表明:经过副峰处理后的DRM信号具有良好的图钉状模糊函数,是一种理想的高频外辐射探测机会照射源,为后续目标探测研究奠定了基础。
As a new standard to replace the traditional analog AM broadcasting, digital radio mondiale （DRM） is in global rapid development. For a HF passive bistatic radar which uses the DRM signal as the illuminator of opportunity, the paper discusses the ambiguity function of DRM signal according to its signal structure. Then, a vice-peak suppression method is proposed after studying the mechanism of these ambiguity peaks. And the correctness of simulation result is verified by the analysis of real data. The experimental results show that DRM signal is an ideal opportunity illuminator and the methodology can effectively mitigate the vice-peaks and get a good thumbtack-like ambiguity function, which lays a theoretical foundation for the target detection in the future.
出处
《雷达科学与技术》
2013年第4期395-400,共6页
Radar Science and Technology
关键词
DRM信号
高频外辐射源雷达
模糊函数
副峰抑制
DRM signal
HF passive bistatic radar
ambiguity function
vice-peak suppression
