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annotate m-toolbox/classes/@specwin/win_hft248d.m @ 0:f0afece42f48

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Import.
author Daniele Nicolodi <nicolodi@science.unitn.it>
date Wed, 23 Nov 2011 19:22:13 +0100
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f0afece42f48 Import.
Daniele Nicolodi <nicolodi@science.unitn.it>
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1 % WIN_HFT248D returns HFT248D window, with N points.
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Daniele Nicolodi <nicolodi@science.unitn.it>
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2 % If mode == 'define', the window values will be empty and all the features
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Daniele Nicolodi <nicolodi@science.unitn.it>
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3 % If mode == 'build', the window values will be calculated
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Daniele Nicolodi <nicolodi@science.unitn.it>
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4 %
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Daniele Nicolodi <nicolodi@science.unitn.it>
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5 % M Hewitson 18-05-07
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Daniele Nicolodi <nicolodi@science.unitn.it>
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6 %
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Daniele Nicolodi <nicolodi@science.unitn.it>
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7 % $Id: win_hft248d.m,v 1.5 2011/05/25 07:30:08 mauro Exp $
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Daniele Nicolodi <nicolodi@science.unitn.it>
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8 %
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Daniele Nicolodi <nicolodi@science.unitn.it>
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9
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Daniele Nicolodi <nicolodi@science.unitn.it>
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10 function varargout = win_hft248d(w, mode, N)
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Daniele Nicolodi <nicolodi@science.unitn.it>
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11
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Daniele Nicolodi <nicolodi@science.unitn.it>
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12 switch lower(mode)
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Daniele Nicolodi <nicolodi@science.unitn.it>
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13
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Daniele Nicolodi <nicolodi@science.unitn.it>
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14 case 'build'
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Daniele Nicolodi <nicolodi@science.unitn.it>
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15 n_args = nargin;
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Daniele Nicolodi <nicolodi@science.unitn.it>
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16 if n_args < 3
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Daniele Nicolodi <nicolodi@science.unitn.it>
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17 N = w.len;
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Daniele Nicolodi <nicolodi@science.unitn.it>
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18 end
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Daniele Nicolodi <nicolodi@science.unitn.it>
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19 % Calculate the values of the window
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Daniele Nicolodi <nicolodi@science.unitn.it>
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20 z = [0:N-1]./N * 2 * pi;
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Daniele Nicolodi <nicolodi@science.unitn.it>
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21 varargout{1} = (1 - 1.985844164102 * cos(z) + ...
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Daniele Nicolodi <nicolodi@science.unitn.it>
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22 1.791176438506 * cos (2 * z) - 1.282075284005 * cos (3 * z) + ...
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Daniele Nicolodi <nicolodi@science.unitn.it>
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23 0.667777530266 * cos (4 * z) - 0.240160796576 * cos (5 * z) + ...
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Daniele Nicolodi <nicolodi@science.unitn.it>
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24 0.056656381764 * cos (6 * z) - 0.008134974479 * cos (7 * z) + ...
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Daniele Nicolodi <nicolodi@science.unitn.it>
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25 0.000624544650 * cos (8 * z) - 0.000019808998 * cos (9 * z) + ...
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Daniele Nicolodi <nicolodi@science.unitn.it>
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26 0.000000132974 * cos (10 * z));
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Daniele Nicolodi <nicolodi@science.unitn.it>
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27
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Daniele Nicolodi <nicolodi@science.unitn.it>
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28 case 'define'
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Daniele Nicolodi <nicolodi@science.unitn.it>
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29 % Make window struct
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Daniele Nicolodi <nicolodi@science.unitn.it>
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30 w.type = 'HFT248D';
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Daniele Nicolodi <nicolodi@science.unitn.it>
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31 w.alpha = 0;
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Daniele Nicolodi <nicolodi@science.unitn.it>
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32 w.psll = 248.4;
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Daniele Nicolodi <nicolodi@science.unitn.it>
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33 w.rov = 84.1;
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Daniele Nicolodi <nicolodi@science.unitn.it>
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34 w.nenbw = 5.6512;
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Daniele Nicolodi <nicolodi@science.unitn.it>
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35 w.w3db = 5.5567;
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Daniele Nicolodi <nicolodi@science.unitn.it>
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36 w.flatness = 0.0009;
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Daniele Nicolodi <nicolodi@science.unitn.it>
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37 w.len = N;
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Daniele Nicolodi <nicolodi@science.unitn.it>
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38 w.skip = 0;
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Daniele Nicolodi <nicolodi@science.unitn.it>
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39
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Daniele Nicolodi <nicolodi@science.unitn.it>
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40 varargout{1} = w;
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Daniele Nicolodi <nicolodi@science.unitn.it>
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41 end
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Daniele Nicolodi <nicolodi@science.unitn.it>
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42
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Daniele Nicolodi <nicolodi@science.unitn.it>
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43 % END