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annotate m-toolbox/classes/@specwin/win_kaiser.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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Daniele Nicolodi <nicolodi@science.unitn.it>
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1 % WIN_KAISER returns Kaiser window, with N points and psll peak sidelobe level.
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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 % A Grynagier 03/01/2010
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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_kaiser.m,v 1.2 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_kaiser(w, mode, N, psll)
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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
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Daniele Nicolodi <nicolodi@science.unitn.it>
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20 % Compute window samples
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Daniele Nicolodi <nicolodi@science.unitn.it>
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21 % - here we adjust to make the window asymmetric
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Daniele Nicolodi <nicolodi@science.unitn.it>
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22 v = kaiser(N+1, pi*w.alpha)';
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Daniele Nicolodi <nicolodi@science.unitn.it>
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23 varargout{1} = v(1:end-1);
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Daniele Nicolodi <nicolodi@science.unitn.it>
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24
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Daniele Nicolodi <nicolodi@science.unitn.it>
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25 case 'define'
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Daniele Nicolodi <nicolodi@science.unitn.it>
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26 % Make window struct
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Daniele Nicolodi <nicolodi@science.unitn.it>
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27 w.type = 'Kaiser';
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Daniele Nicolodi <nicolodi@science.unitn.it>
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28 w.alpha = specwin.kaiser_alpha(psll);
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Daniele Nicolodi <nicolodi@science.unitn.it>
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29 w.psll = psll;
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Daniele Nicolodi <nicolodi@science.unitn.it>
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30 w.rov = specwin.kaiser_rov(w.alpha);
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Daniele Nicolodi <nicolodi@science.unitn.it>
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31 w.nenbw = specwin.kaiser_nenbw(w.alpha);
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Daniele Nicolodi <nicolodi@science.unitn.it>
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32 w.w3db = specwin.kaiser_w3db(w.alpha);
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Daniele Nicolodi <nicolodi@science.unitn.it>
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33 w.flatness = specwin.kaiser_flatness(w.alpha);
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Daniele Nicolodi <nicolodi@science.unitn.it>
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34 w.len = N;
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Daniele Nicolodi <nicolodi@science.unitn.it>
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35 w.skip = 0;
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Daniele Nicolodi <nicolodi@science.unitn.it>
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36
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Daniele Nicolodi <nicolodi@science.unitn.it>
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37 varargout{1} = w;
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Daniele Nicolodi <nicolodi@science.unitn.it>
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38 end