Utilizing channel information at the CDMA transmitter
Dr. Balaji Raghothaman
Nokia Research Center
Irving, Texas
Friday, September 27th, 3:00 PM, ENS 637
Balaji.Raghothaman@nokia.com
Presentation Slides
Abstract
The aim of this talk is to provide an overview of the ways in which
information about the channel can be used in the transmitter of a wireless
communication system with code division multiple access. In a configuration
with multiple antennas, several aspects, like transmit power, the antenna
pattern, etc., can be controlled. In a duplex system, a limited knowledge of
the downlink channel can be derived from the uplink channel. Another approach
is to use some kind of feedback to convey the channel information to the
transmitter.
Further, the design of MIMO systems can differ based on the availability of
either instantaneous channel information or average channel statistics. The
practical problems associated with such systems, and some possible solutions
will be discussed. Finally, there will be an overview of the current standards'
proposals for multi-antenna systems. There will also be an overview of air
interface research at Nokia Research Center, Dallas.
Biography
Dr. Balaji Raghothaman received his PhD in Electrical Engineering at the
University of Texas at Dallas in 1999. He has since been working at Nokia
Research Center, primarily in the area of physical layer algorithms for CDMA.
He has authored 11 conference papers, 1 journal paper and 1 magazine article,
and also has 5 patent applications pending. He holds the Chair position for
IEEE Signal Processing Society, Dallas chapter. His current interests are in
the areas of diversity, MIMO systems, and receiver design.
A list of Wireless Networking and Communications Seminars is available at
from the ECE department Web pages under "Seminars".
The Web address for the Wireless Networking and Communications Seminars is
http://signal.ece.utexas.edu/seminars