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化学学报
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化学学报 ›› 1998, Vol. 56 ›› Issue (10): 990-993. 上一篇    下一篇

研究论文

一种有效提取微弱信号的新方法

方晖;徐静娟;陈洪渊   

  1. 南京大学化学化工学院
  • 发布日期:1998-10-15

A new method of extracting weak signal

Fang Hui;Xu Jingjuan;Chen Hongyuan   

  • Published:1998-10-15

PDF

515

被引次数

16

根据小波变换能进行时频局部化分析的特性,本文提出一种用小波分段分析处理信号的方法。对任意长度的信号数据,在不增减信号点的情况下,提高分析信号的信噪比,有效地从信号中提取有用信息。将它应用于微弱信号检测,效果满意。

关键词: 小波变换, 分段分析, 信号检测, 信号分析, 分段法, 信噪比

According to the characteristics of wavelet transform being able to analyse signal in local time domain and local frequency domain, this paper presents a method of wavelet segmental analysis of signal to increase the S/N of analysing signal and extract information from signal more efficiently. The method was satisfactorily applied in extracting weak signal.

Key words: SIGNAL DETECTION, SIGNAL ANALYSIS, SUBLEVEL METHOD, SIGNAL NOISE RATIO

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