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annotate m-toolbox/classes/@specwin/win_sft3m.m @ 35:4be5f7a5316f database-connection-manager

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author Daniele Nicolodi <nicolodi@science.unitn.it>
date Mon, 05 Dec 2011 16:20:06 +0100
parents f0afece42f48
children
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Daniele Nicolodi <nicolodi@science.unitn.it>
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1 % WIN_SFT3M returns SFT3M 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 calculate%
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Daniele Nicolodi <nicolodi@science.unitn.it>
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4 % M Hewitson 18-05-07
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5 %
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6 % $Id: win_sft3m.m,v 1.5 2011/05/25 07:30:09 mauro Exp $
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7 %
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8
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9 function varargout = win_sft3m(w, mode, N)
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10
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Daniele Nicolodi <nicolodi@science.unitn.it>
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11 switch lower(mode)
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12
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13 case 'build'
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14 n_args = nargin;
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15 if n_args < 3
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Daniele Nicolodi <nicolodi@science.unitn.it>
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16 N = w.len;
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17 end
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Daniele Nicolodi <nicolodi@science.unitn.it>
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18 % Calculate the values of the window
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Daniele Nicolodi <nicolodi@science.unitn.it>
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19 z = [0:N-1]./N * 2 * pi;
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20 varargout{1} = 0.28235 - 0.52105 * cos (z) + 0.19659 * cos (2 * z);
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21
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22 case 'define'
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23 % Make window struct
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24 w.type = 'SFT3M';
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Daniele Nicolodi <nicolodi@science.unitn.it>
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25 w.alpha = 0;
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26 w.psll = 44.2;
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27 w.rov = 65.5;
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28 w.nenbw = 2.9452;
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29 w.w3db = 2.9183;
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30 w.flatness = -0.0115;
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31 w.len = N;
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32 w.skip = 0;
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33
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34 varargout{1} = w;
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35 end
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36
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37 % END