?? detailmeyerwindow.m
字號:
function [index, window] = DetailMeyerWindow(dyadic_points,deg);
% DetailMeyerWindow: Evaluates a bandpass Meyer window
% Usage:
% [index, window] = DetailMeyerWindow(L,deg);
% Inputs:
% dyadic-points Pair of the form 2^j, 2^(j+1)
% deg Degree of the polynomial
% Outputs:
% index location of the window on the time axis; contains [2^j 2^(j+1)]
% window bandpass Meyer window
pio2 = pi/2;
eps = floor(dyadic_points(1)/3);
epsp = dyadic_points(1) - eps - 1;
lftind = [ dyadic_points(1)-eps+1 : dyadic_points(1) ];
lmidind = [ dyadic_points(1)+1 : dyadic_points(1)+eps+1 ];
rmidind = [ dyadic_points(2)-epsp+1 : dyadic_points(2) ];
rghtind = [ dyadic_points(2)+1 : dyadic_points(2)+epsp+1 ];
lft = sin(pio2*WindowMeyer(3*((lftind-1)/dyadic_points(2))-1,deg));
lmid = sin(pio2*WindowMeyer(3*((lmidind-1)/dyadic_points(2))-1,deg));
rmid = cos(pio2*WindowMeyer((3/2)*((rmidind-1)/dyadic_points(2))-1,deg));
rght = cos(pio2*WindowMeyer((3/2)*((rghtind-1)/dyadic_points(2))-1,deg));
index = [lftind lmidind rmidind rghtind] -1;
window = [lft lmid rmid rght];
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