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分数阶自相关和FrFT的LFM信号参数估计 被引量：9

Parameter Estimation of LFM Signal Using Fractional Autocorrelation and FrFT
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摘要 基于分数阶自相关和分数阶傅里叶变换的特点,提出了一种LFM信号检测与参数估计方法。相对分数阶傅里叶二维扫描法和匹配傅里叶变换,所提方法将检测与参数估计的二维搜索变为一维搜索,快速实现信号检测和参数估计,在多分量LFM信号情况下借助“Clean”的方法来抑制强分量对弱分量的干扰。计算机仿真表明了该算法在低信噪比多分量LFM信号检测与参数估计中的有效性。 In this paper, a fast method for parameters estimation of the multi-component linear frequency modulated （multi-LFM） signal is proposed. The proposed algorithm reduces two-dimensional searches, widely used in the time-frequency based method, FrFT and Chirp Fourier transform, into two one-dimensional searches. With utilizing the discrete FrFT along with Fast Fourier Transform （FFT）algorithm, the proposed method is a computationally fast alternative for LFM signal detection and parameters estimation. Analysis of the multi-LFM signal is performed using the Clean technique. Finally, computer simulations are provided to illustrate performances of the proposed algorithm.
作者 王璞 杨建宇 杜雨洺
机构地区 电子科技大学电子工程学院
出处 《电子科技大学学报》 EI CAS CSCD 北大核心 2006年第2期179-182,共4页 Journal of University of Electronic Science and Technology of China
关键词 线性调频信号 分数阶自相关 分数阶傅里叶变换 参数估计 multi-LFM signal fractional autocorrelation FrFT parameter estimation
分类号 TN957.51 [电子电信—信号与信息处理]
  • 相关文献

参考文献5

  • 1齐林,陶然,周思永,王越.基于分数阶Fourier变换的多分量LFM信号的检测和参数估计[J].中国科学（E辑）,2003,33(8):749-759. 被引量：175
  • 2XIA X G.Discrete Chirp-Fourier transform and its application to chirp rateestimation[J].IEEE Transaction on Signal processing,2000,48(11):3 122-3 133.
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  • 5OKAY A,BOUDREAUX G F.Fractional convolution and correlation via operator methods andapplication to detection of linear FM signals[J].IEEE Transaction on SignalProcessing,2001,49(5):979-993.

二级参考文献21

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共引文献174

同被引文献52

引证文献9

二级引证文献21

电子科技大学学报
2006年 第2期

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