[CPC-Info] CPC talk

Marisa Thorne mthorne@uci.edu
Sun Nov 24 15:04:03 2002


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TALK

CAL-(IT)2

Center for Pervasive Communications

Electrical and Computer Engineering Department

The Henry Samueli School of Engineering at UCI

Present

"Coding with Euclidean-space signals: past, present and outlook"


Presentation by

Distinguished Speaker

Dr. Gottfried Ungerboeck

Broadcom Corporation

Monday, December 9th, 2002

11:00 am -12:00 pm Engineering Tower room 331

Abstract

In the time period until about 1975, coding research concentrated on =
"error control codes" with Hamming distance as a criterion for code =
design. The significance of signal codes with large Euclidean distance =
became only clear in connection with voiceband modems employing =
higher-order modulations. This lead to the development of trellis coded =
modulation, multilevel coding, and dense lattices in higher dimensions, =
whose most significant aspects will be described. These Euclidean-space =
coding schemes reached a mature state at the end of the 1980's. The =
advent of "turbo coding" in 1993 marked the beginning of new wave of =
coding research in iterative soft-in soft-out decoding of various types =
of concatenated codes. The analysis of these capacity-approaching =
schemes has in the meanwhile reached an advanced state, however, with =
further results still emerging. The basics of iterative decoding and =
some analysis techniques will be presented. New work in iterative =
equalization and decoding will be mentioned. During the past few years, =
MIMO channels and space-time coding became a hot topic. Some of the =
fundamentals of this new area will be explained. Given so much progress =
in signal-space coding during many years, and the difficult economic =
environment, we will probably not jump to a next big topic soon. A phase =
of consolidations appears to be more likely, to establish which of the =
wealth of new ideas are most useful.


Biography

Gottfried Ungerboeck received a Dipl.Ing. degree from the Technical =
University in Vienna in 1964 and a Ph.D. degree from the Swiss Federal =
Institute of Technology in Zurich in 1970, both in Electrical =
Engineering.

In 1967, he joined the IBM Zurich Research Laboratory in Rueschlikon, =
Switzerland, as a research staff member. His initial work dealt with =
digital speech processing and switching systems. Later he turned to =
communication and information theory. He invented trellis-coded =
modulation. He originated digital signal-processor architectures and =
engaged in their applications. His applied work dealt with voiceband =
modems, satellite transmission, magnetic recording, LAN transceivers, =
cable modems, etc. He has managed signal-processing activities at the =
IBM Zurich Research Laboratory since 1978. In 1998, he joined Broadcom =
Corporation in Irvine, CA, as a technical director dealing with "last =
mile" technologies.

He has been an IBM Fellow since 1984, an IEEE Fellow since 1985, and a =
Foreign Associate of the National Academy of Engineering (USA) since =
1994. He has served as an Associate Editor of IEEE Transactions on =
Communications for 14 years. He received the 1984 IEEE Information =
Theory Group Prize Paper Award, an honorary doctoral degree from the =
Technical University of Vienna (1993), the 1994 IEEE Richard W. Hamming =
Medal, the 1994 Eduard Rhein Basic Science Award (jointly with A. J. =
Viterbi), the 1996 Marconi International Fellowship Award, the 1997 =
Australia Prize, a Golden Jubilee Award for Technological Innovation =
from the IEEE Information Theory Society in 1998, and most recently the =
IEEE Third Millennium Medal.


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<DIV><FONT face=3DArial size=3D2>
<DIV><FONT face=3DArial size=3D2><B><FONT size=3D5>
<P align=3Dcenter>TALK</P></FONT><FONT size=3D4>
<P align=3Dcenter>CAL-(IT)<SUP>2</P></SUP></FONT>
<P align=3Dcenter>Center for Pervasive Communications</P>
<P align=3Dcenter>Electrical and Computer Engineering Department</P>
<P align=3Dcenter>The Henry Samueli School of Engineering at =
UCI</P><FONT size=3D3>
<P align=3Dcenter><FONT size=3D2>Present</FONT></P></B></FONT><FONT=20
size=3D2></FONT><B><FONT size=3D4>
<P align=3Dcenter>"Coding with Euclidean-space signals: past, present =
and=20
outlook"</P></B>
<P align=3Dcenter><BR></FONT><B><FONT size=3D3>Presentation by</P>
<P align=3Dcenter>Distinguished Speaker</P>
<P align=3Dcenter>Dr. Gottfried Ungerboeck</P>
<P align=3Dcenter>Broadcom Corporation</P></B></FONT><FONT =
size=3D2></FONT><B><FONT=20
size=3D3>
<P align=3Dcenter>Monday, December 9<SUP>th</SUP>, 2002</P>
<P align=3Dcenter>11:00 am =9612:00 pm Engineering Tower room =
331</P></FONT>
<P align=3Djustify>Abstract</P></B><FONT size=3D3>
<P align=3Djustify>In the time period until about 1975, coding research=20
concentrated on "error control codes" with Hamming distance as a =
criterion for=20
code design. The significance of signal codes with large Euclidean =
distance=20
became only clear in connection with voiceband modems employing =
higher-order=20
modulations. This lead to the development of trellis coded modulation,=20
multilevel coding, and dense lattices in higher dimensions, whose most=20
significant aspects will be described. These Euclidean-space coding =
schemes=20
reached a mature state at the end of the 1980's. The advent of "turbo =
coding" in=20
1993 marked the beginning of new wave of coding research in iterative =
soft-in=20
soft-out decoding of various types of concatenated codes. The analysis =
of these=20
capacity-approaching schemes has in the meanwhile reached an advanced =
state,=20
however, with further results still emerging. The basics of iterative =
decoding=20
and some analysis techniques will be presented. New work in iterative=20
equalization and decoding will be mentioned. During the past few years, =
MIMO=20
channels and space-time coding became a hot topic. Some of the =
fundamentals of=20
this new area will be explained. Given so much progress in signal-space =
coding=20
during many years, and the difficult economic environment, we will =
probably not=20
jump to a next big topic soon. A phase of consolidations appears to be =
more=20
likely, to establish which of the wealth of new ideas are most=20
useful.</P></FONT><FONT size=3D2>
<P align=3Djustify></P></FONT><B><FONT size=3D3>
<P align=3Djustify><FONT size=3D2>Biography</FONT></P></B>
<P align=3Djustify>Gottfried Ungerboeck received a Dipl.Ing. degree from =
the=20
Technical University in Vienna in 1964 and a Ph.D. degree from the Swiss =
Federal=20
Institute of Technology in Zurich in 1970, both in Electrical =
Engineering.</P>
<P align=3Djustify>In 1967, he joined the IBM Zurich Research Laboratory =
in=20
Rueschlikon, Switzerland, as a research staff member. His initial work =
dealt=20
with digital speech processing and switching systems. Later he turned to =

communication and information theory. He invented trellis-coded =
modulation. He=20
originated digital signal-processor architectures and engaged in their=20
applications. His applied work dealt with voiceband modems, satellite=20
transmission, magnetic recording, LAN transceivers, cable modems, etc. =
He has=20
managed signal-processing activities at the IBM Zurich Research =
Laboratory since=20
1978. In 1998, he joined Broadcom Corporation in Irvine, CA, as a =
technical=20
director dealing with "last mile" technologies.</P>
<P align=3Djustify>He has been an IBM Fellow since 1984, an IEEE Fellow =
since=20
1985, and a Foreign Associate of the National Academy of Engineering =
(USA) since=20
1994. He has served as an Associate Editor of IEEE Transactions on=20
Communications for 14 years. He received the 1984 IEEE Information =
Theory Group=20
Prize Paper Award, an honorary doctoral degree from the Technical =
University of=20
Vienna (1993), the 1994 IEEE Richard W. Hamming Medal, the 1994 Eduard =
Rhein=20
Basic Science Award (jointly with A. J. Viterbi), the 1996 Marconi =
International=20
Fellowship Award, the 1997 Australia Prize, a Golden Jubilee Award for=20
Technological Innovation from the IEEE Information Theory Society in =
1998, and=20
most recently the IEEE Third Millennium=20
Medal.</P></FONT></FONT></DIV></FONT></DIV></BODY></HTML>

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