一种提取含噪声信号中重叠峰位置的新方法(英文)

A Novel Method for Determining the Peak Position from Noisy Overlapped Signals

以二阶B -样条小波为分析小波 ,提出了一种提取分析化学中含噪声重叠峰位置的新方法———连续样条小波变换法 .在合适的尺度下 ,处理后的信号类似于信号的四阶导数 .结果表明 ,采用连续样条小波变换法能使峰变窄 ,并能提高信号的信噪比 ,同时还能从含噪声重叠信号中直接得到重叠峰的数目及其相应的峰位置 .

A new method called continuous spline wavelet transform(CSWT)for determining the peak position of noisy overlapped signals in analytical chemistry was proposed by selecting the secondorder B-splinewavelet as analyzing wavelet.Under suitable dilation,the processed signal is signal obtained by the 4th order differential.The results show that the resolution and the signal-to-noise ration of signal processed by CSWT are enhanced comparing with those of overlapped signal.By CSWT,one can obtain the number of overlapped peaks and the corresponding peak posititions form noisy overlapped signals.