if2phase.m

用于信号处理里面的时频分析

function phi=if2phase(iflaw)
%IF2PHASE Generate the phase from the instantaneous frequency

%	O. Lemoine - February 1996.
% experimental
	 
N=length(iflaw);
phi=zeros(N,1);

%phi=2*pi*cumsum(iflaw);
for k=1:N,
 t=1:k;
 phi(k)=2*pi*integ(iflaw(t),t);
end%  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