Mercurial > hg > ltpda

comparison m-toolbox/classes/@specwin/win_nuttall3b.m @ 0:f0afece42f48

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
Import.
author Daniele Nicolodi <nicolodi@science.unitn.it>
date Wed, 23 Nov 2011 19:22:13 +0100
parents
children
comparison
equal deleted inserted replaced
-1:000000000000 0:f0afece42f48
1 % WIN_NUTTALL3B returns Nuttall3b window, with N points.
2 % If mode == 'define', the window values will be empty and all the features
3 % If mode == 'build', the window values will be calculated
4 %
5 % M Hewitson 18-05-07
6
7 %
8 % $Id: win_nuttall3b.m,v 1.5 2011/05/25 07:30:09 mauro Exp $
9 %
10
11 function varargout = win_nuttall3b(w, mode, N)
12
13 switch lower(mode)
14
15 case 'build'
16 n_args = nargin;
17 if n_args < 3
18 N = w.len;
19 end
20 % Calculate the values of the window
21 z = [0:N-1]./N * 2 * pi;
22 varargout{1} = 0.4243801 - 0.4973406 * cos (z) + 0.0782793 * cos (2 * z);
23
24 case 'define'
25 % Make window struct
26 w.type = 'Nuttall3b';
27 w.alpha = 0;
28 w.psll = 71.5;
29 w.rov = 59.8;
30 w.nenbw = 1.7037;
31 w.w3db = 1.6162;
32 w.flatness = -1.1352;
33 w.len = N;
34 w.skip = 0;
35
36 varargout{1} = w;
37 end
38
39 % END
40