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annotate m-toolbox/classes/@ao/mltfe.m @ 49:0bcdf74587d1 database-connection-manager

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Cleanup
author Daniele Nicolodi <nicolodi@science.unitn.it>
date Wed, 07 Dec 2011 17:24:36 +0100
parents f0afece42f48
children
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Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
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1 % MLTFE compute log-frequency space TF
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Daniele Nicolodi <nicolodi@science.unitn.it>
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2 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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Daniele Nicolodi <nicolodi@science.unitn.it>
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3 %
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Daniele Nicolodi <nicolodi@science.unitn.it>
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4 % DESCRIPTION: MLTFE compute log-frequency space TF
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Daniele Nicolodi <nicolodi@science.unitn.it>
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5 %
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Daniele Nicolodi <nicolodi@science.unitn.it>
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6 % CALL: Txy = mltfe(X,f,r,m,L,fs,win,order,olap,Lmin,method,variance)
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Daniele Nicolodi <nicolodi@science.unitn.it>
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7 %
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Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
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8 % VERSION: $Id: mltfe.m,v 1.25 2009/11/27 15:18:45 miquel Exp $
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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 % HISTORY: 19-05-2007 M Hewitson
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Daniele Nicolodi <nicolodi@science.unitn.it>
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11 % Creation
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Daniele Nicolodi <nicolodi@science.unitn.it>
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12 %
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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
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Daniele Nicolodi <nicolodi@science.unitn.it>
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15 function varargout = mltfe(varargin)
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Daniele Nicolodi <nicolodi@science.unitn.it>
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16
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Daniele Nicolodi <nicolodi@science.unitn.it>
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17 import utils.const.*
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Daniele Nicolodi <nicolodi@science.unitn.it>
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18
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Daniele Nicolodi <nicolodi@science.unitn.it>
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19 % Get inputs
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Daniele Nicolodi <nicolodi@science.unitn.it>
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20 X = varargin{1};
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Daniele Nicolodi <nicolodi@science.unitn.it>
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21 f = varargin{2};
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Daniele Nicolodi <nicolodi@science.unitn.it>
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22 r = varargin{3};
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Daniele Nicolodi <nicolodi@science.unitn.it>
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23 m = varargin{4};
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Daniele Nicolodi <nicolodi@science.unitn.it>
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24 L = varargin{5};
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Daniele Nicolodi <nicolodi@science.unitn.it>
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25 K = varargin{6};
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Daniele Nicolodi <nicolodi@science.unitn.it>
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26 fs = varargin{7};
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Daniele Nicolodi <nicolodi@science.unitn.it>
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27 win = varargin{8};
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Daniele Nicolodi <nicolodi@science.unitn.it>
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28 order = varargin{9};
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Daniele Nicolodi <nicolodi@science.unitn.it>
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29 olap = varargin{10};
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Daniele Nicolodi <nicolodi@science.unitn.it>
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30 Lmin = varargin{11};
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Daniele Nicolodi <nicolodi@science.unitn.it>
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31 method = varargin{12};
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Daniele Nicolodi <nicolodi@science.unitn.it>
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32
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Daniele Nicolodi <nicolodi@science.unitn.it>
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33 % --- Prepare some variables
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Daniele Nicolodi <nicolodi@science.unitn.it>
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34 si = size(X);
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Daniele Nicolodi <nicolodi@science.unitn.it>
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35 nc = si(1);
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Daniele Nicolodi <nicolodi@science.unitn.it>
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36 nf = length(f);
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Daniele Nicolodi <nicolodi@science.unitn.it>
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37 Txy = zeros(nf,1);
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Daniele Nicolodi <nicolodi@science.unitn.it>
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38 dev = zeros(nf,1);
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Daniele Nicolodi <nicolodi@science.unitn.it>
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39 disp_each = round(nf/100)*10;
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Daniele Nicolodi <nicolodi@science.unitn.it>
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40
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Daniele Nicolodi <nicolodi@science.unitn.it>
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41 winType = win.type;
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Daniele Nicolodi <nicolodi@science.unitn.it>
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42 winPsll = win.psll;
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Daniele Nicolodi <nicolodi@science.unitn.it>
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43
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Daniele Nicolodi <nicolodi@science.unitn.it>
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44 % ----- Loop over Frequency
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Daniele Nicolodi <nicolodi@science.unitn.it>
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45 for fi=1:nf
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Daniele Nicolodi <nicolodi@science.unitn.it>
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46 [Txy(fi) dev(fi)]= computeTF(fs, L(fi), K(fi), m, winType, winPsll, X, olap, order, nc, f(fi), fi, nf, disp_each, method);
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Daniele Nicolodi <nicolodi@science.unitn.it>
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47 end
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Daniele Nicolodi <nicolodi@science.unitn.it>
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48
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Daniele Nicolodi <nicolodi@science.unitn.it>
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49 % Set output
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Daniele Nicolodi <nicolodi@science.unitn.it>
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50 varargout{1} = Txy;
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Daniele Nicolodi <nicolodi@science.unitn.it>
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51 varargout{2} = dev;
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Daniele Nicolodi <nicolodi@science.unitn.it>
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52 end
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Daniele Nicolodi <nicolodi@science.unitn.it>
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53
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Daniele Nicolodi <nicolodi@science.unitn.it>
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54 %--------------------------------------------------------------------------
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Daniele Nicolodi <nicolodi@science.unitn.it>
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55 % Function to run over channels
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Daniele Nicolodi <nicolodi@science.unitn.it>
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56 function [Txy,dev]= computeTF(fs, l, K, m, winType, winPsll, X, olap, order, nc, ffi, fi, nf, disp_each, method)
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Daniele Nicolodi <nicolodi@science.unitn.it>
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57
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Daniele Nicolodi <nicolodi@science.unitn.it>
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58 switch lower(winType)
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Daniele Nicolodi <nicolodi@science.unitn.it>
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59 case 'kaiser'
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Daniele Nicolodi <nicolodi@science.unitn.it>
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60 lwin = specwin(winType, l, winPsll);
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Daniele Nicolodi <nicolodi@science.unitn.it>
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61 otherwise
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Daniele Nicolodi <nicolodi@science.unitn.it>
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62 lwin = specwin(winType, l);
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Daniele Nicolodi <nicolodi@science.unitn.it>
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63 end
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Daniele Nicolodi <nicolodi@science.unitn.it>
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64
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Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
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65 % Compute DFT coefficients
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Daniele Nicolodi <nicolodi@science.unitn.it>
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66 twopi = 2.0*pi;
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Daniele Nicolodi <nicolodi@science.unitn.it>
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67 p = 1i * twopi * m(fi)/l.*[0:l-1];
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Daniele Nicolodi <nicolodi@science.unitn.it>
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68 C = lwin.win .* exp(p);
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Daniele Nicolodi <nicolodi@science.unitn.it>
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69
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Daniele Nicolodi <nicolodi@science.unitn.it>
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70 if mod(fi,disp_each) == 0 || fi == 1 || fi == nf
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Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
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71 utils.helper.msg(utils.const.msg.PROC1, 'computing frequency %04d of %04d: %f Hz', fi, nf, ffi);
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Daniele Nicolodi <nicolodi@science.unitn.it>
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72 end
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Daniele Nicolodi <nicolodi@science.unitn.it>
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73 % Loop over input channels
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Daniele Nicolodi <nicolodi@science.unitn.it>
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74 [Txy,dev] = in2out(l, X, K, olap, order, nc, method, C, lwin, fs);
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Daniele Nicolodi <nicolodi@science.unitn.it>
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75
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Daniele Nicolodi <nicolodi@science.unitn.it>
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76 end
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Daniele Nicolodi <nicolodi@science.unitn.it>
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77
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Daniele Nicolodi <nicolodi@science.unitn.it>
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78 %--------------------------------------------------------------------------
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Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
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79 % Compute 1 input to multiple outputs
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Daniele Nicolodi <nicolodi@science.unitn.it>
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80 function [Txy,dev]= in2out(l, X, K, olap, order, nc, method, C, lwin, fs)
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Daniele Nicolodi <nicolodi@science.unitn.it>
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81
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Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
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82 % if no errors are required the function returns zero but errors are not
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Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
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83 % stored in the final ao
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Daniele Nicolodi <nicolodi@science.unitn.it>
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84 dev = 0;
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Daniele Nicolodi <nicolodi@science.unitn.it>
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85
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Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
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86 switch lower(method)
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Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
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87 case 'tfe'
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Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
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88 % Core cross-DFT part in C-mex file
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Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
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89 % We need cross-spectrum and Power spectrum
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Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
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90 [XY, XX, YY, M2, nsegs] = ltpda_dft(X(1,:), X(2,:), l, C, olap, order);
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Daniele Nicolodi <nicolodi@science.unitn.it>
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91 Txy = conj(XY)/(XX);
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Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
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92 if nsegs == 1
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Daniele Nicolodi <nicolodi@science.unitn.it>
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93 dev = Inf;
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Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
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94 else
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Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
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95 dev = sqrt((nsegs/(nsegs-1)^2)*(YY./XX).*(1 - (abs(XY).^2)./(XX.*YY)));
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Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
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96 % dP = sqrt((k/(k-1)^2)*(Pyy./Pxx).*(1 - (abs(Pxy).^2)./(Pxx.*Pyy)));
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Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
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97 end
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Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
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98
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Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
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99 case 'cpsd'
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Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
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100 % Core cross-DFT part in C-mex file
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Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
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101 [XY, XX, YY, M2, nsegs] = ltpda_dft(X(1,:), X(2,:), l, C, olap, order);
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Daniele Nicolodi <nicolodi@science.unitn.it>
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102 S1 = lwin.ws;
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Daniele Nicolodi <nicolodi@science.unitn.it>
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103 S2 = lwin.ws2;
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Daniele Nicolodi <nicolodi@science.unitn.it>
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104 Txy = 2.0*XY/fs/S2;
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Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
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105 Var = 4.0*M2/fs^2/S2^2/nsegs;
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Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
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106 if nsegs == 1
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Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
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107 dev = Inf;
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Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
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108 else
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Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
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109 dev = sqrt(Var);
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Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
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110 end
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Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
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111
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Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
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112 case 'mscohere'
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Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
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113 % Core cross-DFT part in C-mex file
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Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
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114 % We need cross-spectrum and Power spectrum
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Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
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115 [XY, XX, YY, M2, nsegs] = ltpda_dft(X(1,:), X(2,:), l, C, olap, order);
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Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
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116 Txy = (abs(XY).^2)./(XX.*YY); % Magnitude-squared coherence
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Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
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117 if nsegs == 1
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Daniele Nicolodi <nicolodi@science.unitn.it>
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118 dev = Inf;
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Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
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119 else
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Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
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120 dev = sqrt((2*Txy/nsegs).*(1-Txy).^2);
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Daniele Nicolodi <nicolodi@science.unitn.it>
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121 end
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Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
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122
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Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
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123 case 'cohere'
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Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
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124 % Core cross-DFT part in C-mex file
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Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
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125 % We need cross-spectrum and Power spectrum
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Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
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126 [XY, XX, YY, M2, nsegs] = ltpda_dft(X(1,:), X(2,:), l, C, olap, order);
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Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
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127 Txy = XY./sqrt(XX.*YY); % Complex coherence
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Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
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128 if nsegs == 1
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Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
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129 dev = Inf;
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Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
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130 else
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Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
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131 dev = sqrt((2*abs(Txy)/nsegs).*(1-abs(Txy)).^2);
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Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
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132 end
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Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
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133 end
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Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
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134
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Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
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135 end