The IEEE Gainesville Section presents:

Efficient VLSI Implementation of OFDM and MIMO Transceivers

Prof. Gerald E. Sobelman, Dept. of Electrical and Computer
Engineering, University of Minnesota

3:00-3:50pm, March 23, 2007 (Friday), 201 New Engineering Building

Co-sponsored by the Department of Electrical and Computer
Engineering and the IEEE Gainesville Section

Abstract:

OFDM and MIMO communications techniques represent promising
approaches for the development of gigabit wireless systems.  The
main limitation of these designs is that many architectures require
enormous processing power, which leads to challenges for
constructing practical hardware realizations.  In this talk, I will
present reduced-complexity structures for both OFDM and MIMO systems
and describe their mappings onto Xilinx Virtex-4 FPGA chips.

Our design of a Pulsed-OFDM UWB system achieves the same performance
as the proposed OFDM UWB standard while requiring less hardware and
power.  We have also implemented a hardware model of the UWB channel
to provide faster system-level verification.  In the area of MIMO
systems, our FPGA implementation of an 8 x 8 transceiver with a
16-QAM symbol constellation can provide a data throughput of 11.2
Gbps. The design is based on the Geometric Mean Decomposition (GMD)
for a flat fading MIMO channel which has been recently developed at
the University of Florida.  Reduced-complexity MIMO decision
feedback equalizer structures will also be presented.  Our design
flow uses Matlab Simulink as the model builder followed by the
Xilinx System Generator to create a register-transfer level
description which can be synthesized and mapped onto the FPGA
device.


Biography:

Gerald E. Sobelman received a Ph.D. in Physics from Harvard
University.  He has held positions at Sperry Corporation and Control
Data Corporation prior to becoming a faculty member in Electrical
and Computer Engineering at the University of Minnesota. He research
interests are in the areas of digital VLSI circuit and system design
with applications in signal processing and communications.   He has
authored or co-authored more than 90 technical papers and 1 book,
and he holds 11 U.S. patents.  He has taught short courses on VLSI
design and has consulted for several companies.  He is the co-chair
and chair-elect of the Technical Committee on Circuits and Systems
for Communications of the IEEE Circuits and Systems Society and he
has served as an Associate Editor of IEEE Signal Processing Letters.
He is also Director of Graduate Studies for the Graduate Program in
Computer Engineering at the University of Minnesota.


For further information, please contact Dr. Liuqing Yang at
352-262-8951 or lqyang@ece.ufl.edu