资源简介
这是把数据进行伪Wigner-Ville分布分布。在前面你可以先用分解方法分解,在求伪Wigner-Ville分布分布,可运行。
代码片段和文件信息
function [tfrtf] = tfrpwv(xtNhtrace);
%TFRPWV Pseudo Wigner-Ville time-frequency distribution.
% [TFRTF]=TFRPWV(XTNHTRACE) computes the Pseudo Wigner-Ville
% distribution of a discrete-time signal X or the
% cross Pseudo Wigner-Ville representation between two signals.
%
% X : signal if auto-PWV or [X1X2] if cross-PWV.
% T : time instant(s) (default : 1:length(X)).
% N : number of frequency bins (default : length(X)).
% H : frequency smoothing window in the time-domain
% H(0) being forced to 1 (default : Hamming(N/4)).
% TRACE : if nonzero the progression of the algorithm is shown
% (default : 0).
% TFR : time-frequency representation. When called without
% output arguments TFRPWV runs TFRQVIEW.
% F : vector of normalized frequencies.
%
% Example:
% sig=fmlin(1280.10.4); tfrpwv(sig);
%
% See also all the time-frequency representations listed in
% the file CONTENTS (TFR*)
% F. Auger May-August 1994 July 1995.
% Copyright (c) 1996 by CNRS (France).
%
% This program is free software; you can redistribute it and/or modify
% it under the terms of the GNU General Public License as published by
% the Free Software Foundation; either version 2 of the License or
% (at your option) any later version.
%
% This program is distributed in the hope that it will be useful
% but WITHOUT ANY WARRANTY; without even the implied warranty of
% MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
% GNU General Public License for more details.
%
% You should have received a copy of the GNU General Public License
% along with this program; if not write to the Free Software
% Foundation Inc. 51 Franklin St Fifth Floor Boston MA 02110-1301 USA
[xrowxcol] = size(x);
if (nargin < 1)
error(‘At least 1 parameter is required‘);
elseif (nargin <= 2)
N=xrow;
end;
hlength=floor(N/4);
hlength=hlength+1-rem(hlength2);
if (nargin == 1)
t=1:xrow; h = tftb_window(hlength); trace=0;
elseif (nargin == 2)|(nargin == 3)
h = tftb_window(hlength); trace=0;
elseif (nargin == 4)
trace = 0;
end;
if (N<0)
error(‘N must be greater than zero‘);
end;
[trowtcol] = size(t);
if (xcol==0) | (xcol>2)
error(‘X must have one or two columns‘);
elseif (trow~=1)
error(‘T must only have one row‘);
elseif (2^nextpow2(N)~=N & nargin==5)
fprintf(‘For a faster computation N should be a power of two\n‘);
end;
[hrowhcol]=size(h); Lh=(hrow-1)/2; h=h/h(Lh+1);
if (hcol~=1)|(rem(hrow2)==0)
error(‘H must be a smoothing window with odd length‘);
end;
tfr= zeros (Ntcol) ;
if trace disp(‘Pseudo Wigner-Ville distribution‘); end;
for icol=1:tcol
ti= t(icol); taumax=min([ti-1xrow-tiround(N/2)-1Lh]);
tau=-taumax:taumax; indices= rem(N+tauN)+1;
tfr(indicesicol) = h(Lh+1+tau).*x(ti+tau1).*conj(x(ti-tauxcol));
tau=round(N/2);
if (ti<=xrow-tau)&(ti>=tau+1)&(tau<=Lh)
tfr(tau+1icol) = 0.5 * (h(Lh+1+tau) * x(ti+tau1) * conj(x(ti-tauxcol))
属性 大小 日期 时间 名称
----------- --------- ---------- ----- ----
文件 1118292 2018-11-12 20:45 伪Wigner-Ville分布\1224_2_2磨损击穿C-OUT.xlsx
文件 3285 2005-10-13 23:14 伪Wigner-Ville分布\tfrpwv.m
文件 5356 2005-10-13 23:14 伪Wigner-Ville分布\tftb_window.m
文件 709 2018-11-12 21:16 伪Wigner-Ville分布\Unti
目录 0 2018-11-12 21:16 伪Wigner-Ville分布
----------- --------- ---------- ----- ----
1127642 5
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