Pulsar TOA estimation algorithm based on SWT and FRFT

doi:10.3778/j.issn.1002-8331.2008.22.007

Computer Engineering and Applications ›› 2008, Vol. 44 ›› Issue (22): 24-26.DOI: 10.3778/j.issn.1002-8331.2008.22.007

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Pulsar TOA estimation algorithm based on SWT and FRFT

LIU Jin,MA Jie,TIAN Jin-wen

Institute for Pattern Recognition and Artificial Intelligence State Key Laboratory for Multi-spectral Information Processing Technologies，Huazhong University of Science and Technology，Wuhan 430074，China

Received:2008-03-24 Revised:2008-04-24 Online:2008-07-11 Published:2008-07-11
Contact: LIU Jin

基于SWT和FRFT的脉冲星TOA估计算法

刘劲,马杰,田金文

华中科技大学图像所多谱信息处理技术国家重点实验室，武汉 430074

通讯作者: 刘劲

Abstract

Abstract: The pulsar super-resolution TOA algorithm based on stationary wavelet transform and fractional Fourier transform is proposed.First，the pulsar signal in one period is decomposed by multi-SWT.Then，TOA each corresponding to the low frequency part of the FRFT with different resolution is estimated.Finally，multiple-estimation of the pulsar TOA is obtained.The simulation results show that this algorithm can achieve precise and steady TOA with low sampling rate in noisy backgrounds.

Key words: pulsar, TOA, stationary wavelet transformation, fractional Fourier transform

摘要： 提出了一种基于平稳小波和分数阶傅立叶变换的脉冲星超分辨率TOA估计算法。首先，对一个周期内的脉冲星信号进行多层平稳小波分解。然后，估计出与各层低频系数分数阶傅立叶变换相对应的TOA。最后，对脉冲星信号到达时间进行复合估计。实验结果表明，在低采样率，强噪声背景的情况下，该算法能获得稳定、准确的脉冲信号到达时间。

关键词: 脉冲星, TOA, 平稳小波变换, 分数阶傅立叶变换

LIU Jin,MA Jie,TIAN Jin-wen. Pulsar TOA estimation algorithm based on SWT and FRFT[J]. Computer Engineering and Applications, 2008, 44(22): 24-26.

刘劲,马杰,田金文. 基于SWT和FRFT的脉冲星TOA估计算法[J]. 计算机工程与应用, 2008, 44(22): 24-26.

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Pulsar TOA estimation algorithm based on SWT and FRFT

基于SWT和FRFT的脉冲星TOA估计算法

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