Communicating in Line-of-Sight Multiple-Input Multiple-Output
(MIMO) Wireless Channels
Dr. Robert Heath
Electrical and Computer Engineering
The University of Texas at Austin
Friday, December 7th, 3:00 PM, ENS 637
rheath@ece.utexas.edu
Abstract
Multiple-input multiple-output (MIMO) wireless communication
links, i.e., those with multiple transmit and receive antennas, promise
significant spectrum efficiency. Realizing these gains in practice,
however, requires a careful understanding of digital communication in
matrix channels. In this talk we present the average error rate of certain
MIMO space-time coding techniques in line-of-sight MIMO fading channels.
In scalar channels, performance improves as the K-factor (ratio of the
power of the line-of-sight component to the non-line-of-sight component)
increases. Surprisingly, the opposite can be true in MIMO channels
depending on the singular values of the line-of-sight matrix. We
illustrate this and other results by studying the average error rate as a
function of K-factor, coding scheme, and target SNR.
Biography
Robert W. Heath Jr. received the B.S. and M.S. degrees from the
University of Virginia, Charlottesville, Virginia, USA, and the Ph.D
degree from Stanford University, Stanford, CA, in 2001, all in electrical
engineering. From 1998 to 1999 he was with Iospan Wireless Inc. (formerly
Gigabit Wireless Inc.) in San Jose, California. In January 2002 he will
join The University of Texas at Austin as an Assistant Professor in the
Department of Electrical and Computer Engineering. His research group, the
Wireless Systems Engineering Laboratory, focuses on the theory, design,
and practical implementation of wireless systems. His current research
interests include MIMO communication links, wireless networking, and
signal processing for communications, with applications to IEEEE 802.11a
and Bluetooth systems.
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