?? finemeyerwindow.m
字號:
function [index, window] = FineMeyerWindow(dyadic_points,deg);
% FineMeyerWindow: Evaluates a highpass Meyer window
% Usage:
% [index, window] = FineMeyerWindow(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 highpass Meyer window
pio2 = pi/2;
eps = floor(dyadic_points(1)/3);
epsp = dyadic_points(1) - eps - 1;
farlftind = [ 1 : dyadic_points(1)-eps];
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) ];
farlft = zeros(1,length(farlftind));
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 = ones(1,length(rmidind));
index = [farlftind lftind lmidind rmidind];
window = [farlft lft lmid rmid];
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