view m-toolbox/classes/@specwin/win_welch.m @ 19:69e3d49b4b0c
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Update ltpda_uo.fromRepository
author
Daniele Nicolodi <nicolodi@science.unitn.it>
date
Mon, 05 Dec 2011 16:20:06 +0100 (2011-12-05)
parents
f0afece42f48
children
line source
+ − % WIN_WELCH returns Welch 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_welch.m,v 1.5 2011/05/25 07:30:09 mauro Exp $
+ − %
+ −
+ − function varargout = win_welch(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;
+ − varargout{1} = 1 - (2 * z - 1).^2;
+ −
+ − case 'define'
+ − % Make window struct
+ − w.type = 'Welch';
+ − w.alpha = 0;
+ − w.psll = 21.3;
+ − w.rov = 29.3;
+ − w.nenbw = 1.2;
+ − w.w3db = 1.1535;
+ − w.flatness = -2.2248;
+ − w.len = N;
+ − w.skip = 0;
+ −
+ − varargout{1} = w;
+ − end
+ −
+ − % END
+ −