| 分数阶傅里叶变换时滞模型及其应用 |
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| 引用本文： | 陈平,耿亮. 分数阶傅里叶变换时滞模型及其应用[J]. 通信技术, 2011, 44(8): 139-141 |
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| 作者姓名： | 陈平 耿亮 |
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| 作者单位： | 1. 92785部队,河北秦皇岛,066200
2. 中国电子科技集团公司第三十研究所,四川成都,610041 |
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| 摘 要： | 实际采集到的信号中常常含有与信号频谱相同的延时噪声分量,难以用常规的滤波方法剔除。针对延时噪声干扰的特点,依据分数阶傅里叶变换（FRFT）的时移特性和乘积变换延时特性,提出了一个信号与同频噪声分离的时滞模型,通过对含噪信号进行相应的分数阶傅里叶变换,在变换域上可不断加大信号与同频噪声的距离,距离的增加与迭代次数成正比,从而能较好地分离同频干扰。实验中,对分数阶傅里叶变换的分离效果进行了仿真演示。
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| 关 键 词： | 分数阶傅里叶变换 频谱 时滞性 |
Time Time-Delay Model and Its Application of Fractional Fourier Transform |
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| CHEN Ping,GENG Liang. Time Time-Delay Model and Its Application of Fractional Fourier Transform[J]. Communications Technology, 2011, 44(8): 139-141 |
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| Authors: | CHEN Ping GENG Liang |
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| Affiliation: | (①PLA Unit 92785,Qinhuangdao Hebei 066200,China;②NO.30 Institue,CETC,Chengdu Sichuan 610041,China) |
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| Abstract: | It's difficult for traditional filtering to eliminate the noise portion in the actual signal,which hasfor this actual signal comntains a time-delay and same spectrum with the original signal with conventional filtering methodsnoise componenet same with signal spectrum.Based on the time delay and the product transformation delay characteristics of the fractional Fourier transform(FRFT),and in considering the characteristics of time-delay signal,we put forward a FRFT time-delay model is proposed,which can cou... |
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| Keywords: | Fractional fractional Fourier transform Spectrumspectrum Time time delay |
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