view m-toolbox/classes/@specwin/win_hft169d.m @ 37:a4b7ceae0403
database-connection-manager
Show backtrace on unit test errors
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_HFT169D returns HFT169D 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_hft169d.m,v 1.5 2011/05/25 07:30:08 mauro Exp $
%
function varargout = win_hft169d(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} = (1 - 1.97441843 * cos (z) ...
+ 1.65409889 * cos (2 * z) - 0.95788187 * cos (3 * z) + ...
0.33673420 * cos (4 * z) - 0.06364622 * cos (5 * z) + ...
0.00521942 * cos (6 * z) - 0.00010599 * cos (7 * z));
case 'define'
% Make window struct
w.type = 'HFT169D';
w.alpha = 0;
w.psll = 169.5;
w.rov = 81.2;
w.nenbw = 4.8347;
w.w3db = 4.7588;
w.flatness = 0.0017;
w.len = N;
w.skip = 0;
varargout{1} = w;
end
% END