Recent Results for High Speed Downlink Packet Access (HSDPA) for WCDMA Research at TI:
Interference cancellation and MIMO

Dr. Anand Dabak

Wireless Communications Branch
DSPS R&D Center, Texas Instruments
12500 TI Boulevard, MS 8632, Dallas, TX 75243

Friday, May 3rd, 3:00 PM, ENS 637

dabak@ti.com

Abstract

In this talk we summarize the research at TI related to HSDPA namely, equalization, interference cancellation, transmit antenna diversity and MIMO. The HSDPA system enhances the downlink of 3G WCDMA system for data systems by employing higher order 16-QAM, HARQ, adaptive modulation and coding and employing efficient schedulers at the base station. Because of the higher-order modulation that is used, multi-path becomes a problem and advanced receivers like equalization or interference cancellation have to be employed at the mobile. In this talk we present simulation results for equalization/interference cancellation to combat multi-path at the mobile for HSDPA receivers.

Also new ideas for MIMO techniques which exploit channel information/ARQ information at the transmitter to improve MIMO performance will be presented.

Biography

Anand Dabak received his B.Tech. in Electrical Engineering from the Indian Institute of Technology, Bombay, India in 1987 and the M.Sc and Ph.D. degrees in Electrical Engineering, in 1989 and 1992 respectively from Rice University, Houston, Texas.

After receiving his Ph.D. he worked for Viasat Inc., Carlsbad, California in satellite communications. He joined Texas Instruments Incorporated, Dallas, Texas in 1995 and has since then has worked on the system and algorithm issues related to wireless communications. Presently he is a Senior Member of Technical Staff and manager of mobile wireless research in the DSPS R&D center of Texas Instruments. He has been involved in the standardization activity in third generation wireless systems, Bluetooth and IEEE 802.15.3. His work in applying space time block codes for wideband CDMA systems resulted in the standardization of open loop transmit diversity techniques for third generation cellular systems. He holds 8 patents in the area of digital communications.

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