Using Advanced Time Domain Function And Interpolation In Frequency Domain Algorithm Based On The Shannon Wavelet Packet Transform To Measurement The Nonstationary Harmonics
Wavelet Packet Transform (WPT) is one of the most powerful tools in the analysis of the nonstationary signals. Shannon wavelet function is the only function that can divide the frequency domain strictly in the single wavelet family, but the time waveform of Shannon wavelet is not compactly supported, so the application of it is limited. In this paper, a kind of optimized Shannon Wavelet Transform (SWPT) algorithm is proposed. Firstly, the incompactly supported characters is improved in time domain by modification the functions time expression; secondly; the interpolation algorithm in SWPTS frequency filter is proposed to ameliorate the performance father more; then the fast computation of algorithm using chirp Z transform is implemented, at last the numeric simulation has been given out. The result shows the algorithm improves the performance of the SWPT effectively.
Shannon Wavelet Packet Transform (SWPT) advance of time function interpolation in frequency domain chirp Z transform nonstationary harmonics
Bian Hailong Chen Guangju
CAT Lab,School of Automation Engineering,University of Electronic Science and Technology,Chengdu 610054,China
国际会议
西安
英文
2007-08-16（万方平台首次上网日期，不代表论文的发表时间）