Equalization For Discrete Multitone Transceivers
Mr. Guner Arslan
The University of Texas at Austin
Wednesday, November 15th, 10;00 AM, ENS 602
arslan@ece.utexas.edu
Abstract
G.DMT and G.lite Asymmetric Digital Subscriber Line (ADSL) modems and
some Very-high-speed Digital Subscriber Line (VDSL) modems rely on
discrete multitone modulation (DMT).
In an ADSL discrete multitone receiver, a time-domain equalizer (TEQ)
reduces intersymbol interference (ISI) by shortening the effective
duration of the channel impulse response.
Methods such as minimum mean-squared error (MSE), maximum shortening SNR
(SSNR), and geometric TEQ design methods do not directly optimize channel
capacity.
We present a TEQ design method to optimize channel capacity.
We also present a computationally-efficient, near-optimal minimum-ISI
(min-ISI) method that generalizes the maximum SSNR (MSSNR) method by
weighting the ISI in the frequency domain.
Biography
Guner Arslan graduated as Valedictorian with BS in Electronics and
Telecommunication Engineering degree from Yildiz University at
Kocaeli, Kocaeli, Turkey in July 1994.
He joined the Dept. of Electronics and Telecommunication Engineering
of Yildiz Technical University in Istanbul as a Research Assistant
in 1995 where he worked on DTMF detection, stereophonic acoustic echo
cancellation, SAR image processing, and speech recognition.
He received his MS in Electronics and Telecommunication Engineering from
Yildiz Technical University, Istanbul, Turkey in July 1996.
While taking classes for his Ph.D. at Yildiz Technical University
he received a full scholarship from the Turkish Government in 1998 to
continue his graduate education abroad.
He is working towards his Ph.D.E.E degree in the area of
Telecommunications and Information Systems Engineering from The Dept. of
Electrical and Computer Engineering at the University of Texas at Austin,
Austin, TX.
His current research interests are digital signal processing for
communications, audio/speech applications and learning systems
(neural networks, genetic algorithms, adaptive filters).
A list of Telecommunications and Signal Processing Seminars is available at
from the ECE department Web pages under "Seminars".
The Web address for the Telecommunications and Signal Processing Seminars is
http://signal.ece.utexas.edu/seminars