A Fully Digital Wideband Transmitter and Techniques for Enhancement of Its Power Efficiency

April 27, 2010
Time: 2:00pm-3:00pm
EE Conference room, Mudd 1300
Hosted by: Prof. Gil Zussman
Speaker: Dr. Oren Eliezer

Abstract

The ever increasing level of integration in a system-on-chip (SoC) for wireless applications has created a demand for transceiver architectures that are amenable to integration in the most advanced CMOS processes, in which the processor and memory of the SoC would be realized. Additional challenge faced by transceiver designers are the need to support wide bandwidth, with the increase in data rates introduced by wireless standards such as 3G and WLAN/WiMax, and the emergence of LTE, as well as the need to minimize power dissipation and maximize battery lifetime.

This seminar presents a novel transmitter architecture that addresses these challenges using a fully digital structure, where the digitally-represented quadrature baseband signals are modulated onto the RF carrier and converted into an analog signal within the same circuit. Additionally, a digitally extensive algorithm for reduced-bandwidth envelope-tracking in the transmitter’s power-amplifier is proposed for the enhancement of the transmitter’s overall power efficiency.


Speaker Biography

Oren Eliezer received his Bachelor’s and Master’s degrees in Electrical Engineering from the Tel-Aviv University in Israel in 1988 and 1996 respectively, and his PhD from the University of Texas at Dallas in 2008.

He started his engineering career in wireless communications in the Israeli military in 1988, and in 1994 confounded the startup Butterfly and served as its chief engineer.

He joined Texas Instruments in 1999 with their acquisition of Butterfly and became a senior member of the technical staff in the Wireless Terminals Business Unit of TI, where he specialized in radio architecture, interference and coexistence solutions, and low-cost testing.
He has authored and coauthored 29 patents and 35 conference and journal papers, has given over 20 invited talks and seminars, and has co-organized and co-chaired several IEEE workshops, including the IEEE Dallas Circuits and Systems Workshop of 2009.

He is currently the CTO at the Dallas based startup Xtendwave, and is also involved in the research of low-cost mm-wave applications at the Texas Analog Center of Excellence at UTD.


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