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基于EMD的高频地波雷达抑制射频干扰研究 被引量:5

Study on radio-frequency interferences suppression in high frequency ground wave radar based on EMD
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摘要 提出了一种新的抑制射频干扰(RFI)方法,通过短时傅里叶变换找到干扰的时间位置,应用经验模态分解(EMD)方法,去除满足一定频域条件的射频干扰,达到在抑制射频干扰的同时,最大程度上保留有用信号的目的.实测数据分析表明:该方法在不损失有用信号的基础上有效抑制了射频干扰,且处理速度快,满足高频地波雷达(HFGW)实时工作要求. A new method of radio‐frequency interference suppression was proposed .The method de‐termined the interference position through the short time Fourier transform (STFT) and removed ra‐dio frequency interference to meet certain conditions in frequency domain by the application of empiri‐cal mode decomposition (EMD) algorithm .Suppression of interference was achieved and the useful signal to the biggest extent was retained .Analysis of measured data shows that this method is effec‐tive to suppress the radio‐frequency interference (RFI) suppression without losing of useful signal , which is able to meet the real‐time processing of the high frequency ground wave (HFGW) radar sys‐tem .
出处 《华中科技大学学报(自然科学版)》 EI CAS CSCD 北大核心 2015年第9期55-58,共4页 Journal of Huazhong University of Science and Technology(Natural Science Edition)
基金 国家自然科学基金资助项目(41376182) 海洋公益性行业科研专项基金资助项目(201205032) 湖北省科技支撑计划资助项目(2014BEC057) 国家海洋局数字海洋科学技术重点实验室2014年度开放基金资助项目(KLD0201401) 中央高校基本科研业务费专项资金资助项目(2042014kf0028)
关键词 高频地波雷达 射频干扰 短时傅里叶变换 经验模态分解算法 有用信号 实测数据 high frequency ground wave radar radio-frequency interferences short time Fourier transform empirical mode decomposition useful signal measured data
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参考文献14

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二级参考文献34

  • 1邓巍,文必洋,周浩.基于特征分解的高频地波雷达抗射频干扰研究[J].电波科学学报,2004,19(5):565-568. 被引量:14
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