J4 ›› 2010, Vol. 37 ›› Issue (6): 1059-1064.doi: 10.3969/j.issn.1001-2400.2010.06.014

• 研究论文 • 上一篇    下一篇

一种用于脉冲星信号去噪的新方法

孙景荣;许录平;王婷   

  1. (西安电子科技大学 电子工程学院,陕西 西安  710071)
  • 收稿日期:2009-11-06 出版日期:2010-12-20 发布日期:2011-01-22
  • 通讯作者: 孙景荣
  • 作者简介:孙景荣(1975-),女,讲师,西安电子科技大学博士研究生,E-mail: jrsun@xidian.edu.cn.
  • 基金资助:

    国家高技术研究发展计划资助项目(2007AA12Z323);国家自然科学基金资助项目(60772139);中国科学院精密导航定位与定时技术重点实验室开放基金资助项目(2009PNTT08);中央高校基本科研业务费资助项目(K50510020037)

New denoising method for pulsar signal

SUN Jing-rong;XU Lu-ping;WANG Ting   

  1. (School of Electronic Engineering, Xidian Univ., Xi'an  710071, China)
  • Received:2009-11-06 Online:2010-12-20 Published:2011-01-22
  • Contact: SUN Jing-rong

摘要:

为改善脉冲星辐射脉冲信号的信噪比,提出了一种基于双谱重构的脉冲星信号消噪方法.该方法将含噪脉冲星信号变换到双谱域,利用α-删减滤波器分别对其双谱相位和幅值进行滤波处理,再根据滤波后的双谱重构信号的功率谱和相位.实验结果表明,该方法可有效地滤除脉冲星信号中的噪声,显著改善了信噪比.

关键词: 脉冲星, α-删减滤波器, 双谱重构, 信号处理

Abstract:

In order to improve the signal-to-noise ratio(SNR) of the pulsar signal, this paper proposes a denoising algorithm based on bispectrum reconstruction for the pulsar signal. First, the noisy pulsar signal is transformed into the bispectral domain. The bispectrum phase and amplitude are filtered by the α-trimmed filter. Then, the power spectrum and phase of the pulsar signal can be recovered from the filtered bispectrum. Results indicate that this method can eliminate noise in the pulsar signals, and improve the SNR notably.

Key words: pulsar, α-trimmed filter, bispectrum reconstruction, signal processing