资源简介
matlab时频分析工具箱tftb-0.2
代码片段和文件信息
% 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
echo off
%PARAMFUN Figures representing different TFD of the Cohen‘s class.
% On the left the ambiguity plane and the weighting functions ;
% On the right the time-frequency distributions.
% O. Lemoine - February July 1996.
if ~exist(‘paramfun.mat‘)
echo on
%
% PARAMFUN does not exist.
%
% You haven‘t created “paramfun.mat“. Please run ??? to proceed.
% The next part of the demo is skipped.
%
else
load paramfun
Ncont=5;
subplot(321);
contour(dlr([(N+rem(N2))/2+1:N 1:(N+rem(N2))/2]:)8);
xlabel(‘Delay‘); ylabel(‘Doppler‘);
title(‘Wigner-Ville weighting function‘)
set(gca‘yTickLabel‘[])
set(gca‘xTickLabel‘[])
hold on
[ah]=contour(WF1[1/2]‘g‘);
set(h‘linewidth‘2);
hold off
subplot(322);
Max=max(max(tfr1));
levels=linspace(Max/10MaxNcont);
contour(tfr1levels);
xlabel(‘Time‘); ylabel(‘Frequency‘);
title(‘Wigner-Ville distribution‘)
set(gca‘yTickLabel‘[])
set(gca‘xTickLabel‘[])
subplot(323);
contour(dlr([(N+rem(N2))/2+1:N 1:(N+rem(N2))/2]:)8);
xlabel(‘Delay‘); ylabel(‘Doppler‘);
title(‘Spectrogram weighting function‘);
set(gca‘yTickLabel‘[])
set(gca‘xTickLabel‘[])
hold on
[ah]=contour(WF2[1/2]‘g‘);
set(h‘linewidth‘2);
hold off
subplot(324);
Max=max(max(tfr2));
levels=linspace(Max/10MaxNcont);
contour(tfr2(1:N/2:)levels);
xlabel(‘Time‘); ylabel(‘Frequency‘);
title(‘Spectrogram‘)
set(gca‘yTickLabel‘[])
set(gca‘xTickLabel‘[])
subplot(325);
contour(dlr([(N+rem(N2))/2+1:N 1:(N+rem(N2))/2]:)8);
xlabel(‘Delay‘); ylabel(‘Doppler‘);
title(‘SP-WV weighting function‘);
set(gca‘yTickLabel‘[])
set(gca‘xTickLabel‘[])
hold on
[ah]=contour(WF3[1/2]‘g‘);
set(h‘linewidth‘2);
hold off
subplot(326);
Max=max(max(tfr3));
levels=linspace(Max/10MaxNcont);
contour(tfr3levels);
xlabel(‘Time‘); ylabel(‘Frequency‘);
title(‘Smoothed-pseudo-WVD‘);
set(gca‘yTickLabel‘[])
set(gca‘xTickLabel‘[])
figure(2);
subplot(221);
contour(dlr([(N+rem(N2))/2+1:N 1:(N+rem(N2))/2]:)8);
xlabel(‘Delay‘); ylabel(‘Doppler‘);
title(‘Born-Jordan weighting function‘);
set(gca‘yTickLabel‘[])
set(gca‘xTickLabel‘[])
hold on
[ah]=contour(WF4[1/2]‘g‘);
set(h‘linewidth‘2);
hold off
subplot(222);
Max=max(max(tfr4));
lev
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