Analytical Wavelet Transform
awt = AWT(x,nvoice,Name,sigma2,par2);
signal, could be complex
number of voices default = 12
Type of Window function, so far only "Gaussian" window available
first parameter, for Gaussian window, it could be variance, default = 1
another parameter, for Gaussian, it's xi(shifting frequency) default = 5
Analytical wavelet transform of x
Coarsest scale is '2', finest scale is (log2(n)-5); awt is a n by nscale matrix;
Mallat, "A Wavelet Tour of Signal Processing";
4.4.3 Analytical Wavelet Transform