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天波超视距雷达窄带干扰抑制技术研究 被引量:7

Study on Narrowband Interference Suppression in Sky Wave OTHR
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摘要 天波超视距雷达工作在高频段,其最佳工作频率、带宽常常受到电离层状态的限制。在高频段,密集的外干扰如广播电台、短波通信等污染了雷达的接收数据,导致其性能显著下降。为抑制具有明显空域特性和频域特性的短波干扰,文中提出了空时二维阻塞法进行处理,即通过谱分析获取外干扰的方位和频率后,先阻塞主瓣干扰,然后使用波束形成技术抑制副瓣干扰。在此基础上,进一步分析了空时二维阻塞的本质,提出了同时阻塞多个干扰的方法。仿真结果表明,该方法具有很好的抑制效果。 Sky wave over the -horizon radar(OTHR) works in the high frequency band. Its optimal frequency and band are generally limited by the state of ionosphere. The external dense interferences in the HF band, such as broadcast, shortwave communication and so on, contaminate the radar received data, which can significantly degrade the radar performance. To suppress the shortwave interference of significant characteristics in frequency domain and spatial domain, this paper proposes a new method for spatial-time blocking processing. Firstly, it utilizes the spatial spectrum estimation technique to attain the direction and frequency of the interference, then blocks the mainlobe interference, and finally employs the DBF technique to suppress the sidelobe interference. In addition, this paper analyses the principle of the spatial-time blocking processing, proposes a method to suppress more jamming sources. The performance of the proposed technique is illustrated by the simulation results.
出处 《雷达科学与技术》 2009年第3期163-168,共6页 Radar Science and Technology
基金 总装资助项目
关键词 天波超视距雷达 空时二维阻塞 窄带干扰抑制 数字波束形成 sky wave OTHR space-time 2-D blocking narrowband interference suppression digital beamforming(DBF)
作者简介 薛峰 男,1987年出生,辽宁省葫芦岛市人,现就读于武汉科技大学中南分校电子信息工程专业,对雷达通信和计算机网络有着浓厚的兴趣,主要研究领域为信号与信息处理。 谢谠 男,1979年10月出生,安徽省枞阳县人,2003年毕业于杭州电子工业学院信息与计算科学专业,现为空军雷达学院信号与信息处理专业研究生,主要研究方向为阵列信号处理。 陈辉 男,1974年出生,江苏启东人,空军雷达学院兵器运用工程重点实验室副教授,主要研究领域为空间谱估计、阵列信号处理等,在国内外学术刊物发表论文40余篇。
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共引文献17

同被引文献57

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