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From: greszcz@utcsri.UUCP (John Greszczuk)
Newsgroups: net.dcom
Subject: Re: Codex 2660 series modems
Message-ID: <1121@utcsri.UUCP>
Date: Thu, 16-May-85 13:31:27 EDT
Article-I.D.: utcsri.1121
Posted: Thu May 16 13:31:27 1985
Date-Received: Thu, 16-May-85 13:55:25 EDT
References: <400@wdl1.UUCP> <166@kontron.UUCP>
Organization: CSRI, University of Toronto
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> Does anyone know:
>   2.  Any other good papers (hopefully readable without too much
>       mathemagic) on trellis coding and other techniques used in
>       these incredible-by-212-standards modems?  I'm starting with
>       Gottfried Ungerboeck's "Channel Coding with Multilevel/Phase
>       Signals" in IEEE Trans. Info. Theory, IT-28 #1, January 1982.
>       This is rough going for me, so pointers to more directly
>       relevant, diluted, tutorial type articles would be much
>       appreciated.
______________________________________________________________________

     A good comprehensive tutorial article is :

" Efficient Modulation for Bandlimited Channels "
in the IEEE Journal on Selected Areas in Communications , September 1984.

It is written by Forney, Quershi, Lang and some others who are 
associated with Motorola Information Systems ( CODEX , ESE ).

There are other more specific articles that might be of interest in
that special issue on voiceband data communications.

John Greszczuk
Dept. of Elec. Eng.
University of Toronto