comparison aim-mat/tools/@signal/generateamnoise.m @ 0:74dedb26614d

Initial checkin of AIM-MAT version 1.5 (6.4.2011).

+% method of class @signal
+% function sig=genbandpassnoise(sig,varargin)
+%   INPUT VALUES:
+%       sig: @signal with length and samplerate 
+%   RETURN VALUE:
+%       sig:  @signal 
+%
+% (c) 2003-2008, University of Cambridge, Medical Research Council 
+% Maintained by Tom Walters ([e-mail]), written by Stefan Bleeck ([e-mail])
+% http://www.pdn.cam.ac.uk/cnbh/aim2006
+% $Date: 2008-06-10 18:00:16 +0100 (Tue, 10 Jun 2008) $
+% $Revision: 585 $
+
+function sig=generateAMnoise(sig,fre,modgrad)
+
+len=getlength(sig);
+sr=getsr(sig);
+
+% generate white noise:
+vals=getvalues(sig);
+vals=rand(size(vals)).*2-1;
+sig=setvalues(sig,vals);
+
+envelope=generatesinus(sig,fre,1,0);
+envelope=(envelope+1)/2;
+
+sig=sig*envelope;
+
+
+sig=setname(sig,sprintf('AM noise Frequency %4.1f Hz',fre));
+
+return