MIT Department of Electrical Engineering & Computer Science
Approaching the Channel Capacity of Bandlimited Channels
G. David Forney, Jr.
Vice President, Motorola, and Bernard M. Gordon Adjunct Professor, MIT
Monday, November 4, 1996
4:00 PM (3:45 refreshments)
Edgerton Hall, Room 34-101
EECS Colloquium
Abstract
In 1948, Shannon developed fundamental limits on communications
efficiency over band-limited Gaussian noise channels. Practical
modulation techniques until recently made only modest progress toward
the Shannon limit.
In the past few years, however, with the introduction of coded
modulation methods, rapid advances have been made, to the point where
practical systems now approach the theoretical Shannon limit. The new
V.34 international standard for data transmission at up to 33.6 kb/s
over the public switched telephone network embodies many of these
advances, as do other current wireline and wireless data transmission
standards. We will survey these developments.
Most recently, several modem companies have announced "faster than
Shannon" 56 kb/s modems. We will explain briefly how this trick is
done.
URL of this page:
http://www-eecs.mit.edu/AY96-97/events/6.html
Created: Sep 18, 1996
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Modified: Jun 24, 1997
This announcement is from the MIT EECS 1996-97 archive.
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