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From: wei@princeton.UUCP (P Wei)
Newsgroups: net.micro.pc,net.math,net.lang.pascal
Subject: Using Fourier Transform to find T for a function ??
Message-ID: <1185@princeton.UUCP>
Date: Fri, 13-Dec-85 18:14:05 EST
Article-I.D.: princeto.1185
Posted: Fri Dec 13 18:14:05 1985
Date-Received: Sat, 14-Dec-85 08:09:39 EST
Distribution: net
Organization: Princeton University EECS Dept
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Xref: watmath net.micro.pc:6196 net.math:2621 net.lang.pascal:402

I am using Pascal to write a data acquisition program for our lab.
I have a problem concerning the possibility of using Fourier Transform to 
find the period of a function (say sin(2*pi*f*t) ) superimposed by exp(-t)
type of function. (i.e. overall of the function looks like 
exp(-t) * sin (wt) .
My job is to find w using programing instead of visually counting the dip
position of the data coming out of the experiment.
I am new to Fourier Transform. Can anyone tell me if this is feasible ?
Will the spectrum have a large peak at w so that I can easily pick it up ?
I am too lazy lately to go through the math on the paper. 
Please send me any info through mail . thanks .
HP   (wei@princeton)