Multi-resolution Approach to Periodicity Detection Based on Wavelet Transform
Zhanyang Xu, Shunyi Zhang · 2010
In this paper,we present a novel approach of periodicity detection using wavelet technology. Adaptive wavelet denoising is applied to the PV data.The redundant dyadic discrete wavelet transform is used to decompose the PV oscillation and detect the extreme wavelet coefficients which used to reconstruct the PV signal to avoid signal distortion at different resolution scales.Calculating the indexes based on the post-processing of extreme coefficients,periodicity at the scales selected is worked out,and the PV oscillation periodicity can be obtained.