view m-toolbox/classes/@specwin/win_sft3f.m @ 43:bc767aaa99a8
CVS Update
author
Daniele Nicolodi <nicolodi@science.unitn.it>
date
Tue, 06 Dec 2011 11:09:25 +0100 (2011-12-06)
parents
f0afece42f48
children
line source
+ − % WIN_SFT3F returns SFT3F window, with N points.
+ − % If mode == 'define', the window values will be empty and all the features
+ − % If mode == 'build', the window values will be calculated
+ − %
+ − % M Hewitson 18-05-07
+ − %
+ − % $Id: win_sft3f.m,v 1.5 2011/05/25 07:30:09 mauro Exp $
+ − %
+ −
+ − function varargout = win_sft3f(w, mode, N)
+ −
+ − switch lower(mode)
+ −
+ − case 'build'
+ − n_args = nargin;
+ − if n_args < 3
+ − N = w.len;
+ − end
+ − % Calculate the values of the window
+ − z = [0:N-1]./N * 2 * pi;
+ − varargout{1} = 0.26526 - 0.5 * cos (z) + 0.23474 * cos (2 * z);
+ −
+ − case 'define'
+ − % Make window struct
+ − w.type = 'SFT3F';
+ − w.alpha = 0;
+ − w.psll = 31.7;
+ − w.rov = 66.7;
+ − w.nenbw = 3.1681;
+ − w.w3db = 3.1502;
+ − w.flatness = 0.0082;
+ − w.len = N;
+ − w.skip = 0;
+ −
+ − varargout{1} = w;
+ − end
+ −
+ − % END