Wavelet analysis of a signal produced by moving CDW

Abstract
We present a survey of our recent results on peculiarities of CDW dynamics in o-TaS, along with the new ones related to time variations of CDW velocity. The signal produced by moving CDW including both the narrow-band (NB) signal and the broad-band (BB) "noise" has been captured and digitised in real time. This signal was analysed using diverse wavelet transform based methods. Several specific features found to be characteristic for CDW motion will be discussed: the lack of correlation between so called "harmonics" and the main frequency of NB signal; the fine structure ofNB line; the singularities in a BB signal; the fast temporal variations of CDW velocity.