Date: Wed, 18 Jun 2003 15:43:03 -0700
From: Phil Karn <karn@ka9q.net>
To: Bob Bruninga <bruninga@usna.edu>
Subject: Re: RINO GPS
 
Bob Bruninga wrote:
> But could you just look at the WAVEFORM we captured on
>
>   http://www.ew.usna.edu/~bruninga/APRSrino.html
>
> and tell us what it looks like?
 
My first guess is MSK at 600 or 1200 bits/sec. MSK is very widely used
at these speeds for the little ID data bursts you hear at the beginning
of police and fire radio transmissions, and there are chips available to
do the encoding and decoding.
 
Here's a good link on MSK I found on Google.
 
http://www.columbia.edu/~rdg74/ee6713/MSK.PDF