| 基于分数阶Fourier变换的多分量LFM信号检测与参数估计 |
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| 引用本文： | 章步云,刘爱芳,朱晓华,刘中.基于分数阶Fourier变换的多分量LFM信号检测与参数估计[J].数据采集与处理,2003,18(4):408-411. |
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| 作者姓名： | 章步云 刘爱芳 朱晓华 刘中 |
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| 作者单位： | 南京理工大学电子工程系,南京,210094 |
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| 摘 要： | 介绍了分数阶Fourier变换的基本原理和基本性质，提出了基于分数阶Fourier变换的多分量LFM信号检测和参数估计方法。为了解决多个LFM分量之间的相互影响问题．特别是强分量掩盖弱分量的问题．本文还提出了一种结合逐次消去思想和分数阶Fourier变换的多分量LFM信号检测和参数估计算法，它可以解决强度相差较大的多分量LFM信号中检测和估计弱LFM分量参数的问题。仿真实验结果证明了该算法的有效性。
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| 关 键 词： | 信号处理 参数估计 分数阶Fourier变换 多分量LFM信号 信号检测 |
| 文章编号： | 1004-9037(2003)04-0408-04 |
| 修稿时间： | 2002年9月24日 |
Multicomponent LFM Signal Detection and Parameter Estimation Based on Fractional Fourier Transform |
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| ZHANG Bu yun,LIU Ai fang,ZHU Xiao hua,LIU Zhong.Multicomponent LFM Signal Detection and Parameter Estimation Based on Fractional Fourier Transform[J].Journal of Data Acquisition & Processing,2003,18(4):408-411. |
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| Authors: | ZHANG Bu yun LIU Ai fang ZHU Xiao hua LIU Zhong |
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| Abstract: | The detection and parameter estimation of multicomponent LFM signals is extensively discussed. This paper firstly introduces the basic theory and the basic properties of the fractional Fourier transform (FrFT), then a new method for multicomponent LFM signal detection and parameter estimation based on fractional Fourier transform is proposed. To eliminate the mutual effects of multiple LFM components, especially the strong LFM signal to weak LFM signal, a novel scheme combining the idea of elimination one by one with the fractional Fourier transform is presented, which can effectively detect weak LFM signals and estimate their parameters among some strong LFM signals. Simulational results show its effectivity. |
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| Keywords: | fractional Fourier transform LFM signal parameter estimation |
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