Mercurial > hg > aimmat
diff aim-mat/tools/@signal/generateamnoise.m @ 0:74dedb26614d
Initial checkin of AIM-MAT version 1.5 (6.4.2011).
| author | tomwalters |
|---|---|
| date | Fri, 20 May 2011 12:32:31 +0100 |
| parents | |
| children | 20ada0af3d7d |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/aim-mat/tools/@signal/generateamnoise.m Fri May 20 12:32:31 2011 +0100 @@ -0,0 +1,32 @@ +% 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 (tcw24@cam.ac.uk), written by Stefan Bleeck (stefan@bleeck.de) +% 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