doppler.m

Matlab时频分析工具箱,希望能对大家有所帮助啊

function s=doppler()
%DOPPLER  Load the 'doppler' test signal.
%   Usage:  s=doppler;
%
%   DOPPLER() loads the 'doppler' signal. It is a recording
%   of a train passing close by.
%
%   The signal is 157058 samples long and sampled at 16 kHz.
%
%   The signal was obtained from
%      http://www.fourmilab.ch/cship/doppler.html
%
%   EXAMPLES:  EXAMP_DOPPLER

% 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 3 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, see <http://www.gnu.org/licenses/>.

if nargin>0
  error('This function does not take input arguments.')
end;

global TF_BASEPATH;

if isoctave
  s=loadaudio([TF_BASEPATH,'/signals/doppler'],'au');
else
  s=auread([TF_BASEPATH,'/signals/doppler.au']);
end;