[UCI-Calit2] Upcoming Event

[Anna Lynn Spitzer]

Title:                           Optimal Operating Point for MIMO
Multiple Access Channel with Bursty Traffic

Speaker:                    Tara Javidi, professor, Department of
Electrical & Computer Engineering, UCSD

Time:                          11 a.m.

Date:                           October 13, 2006

Location:                    Calit2 Building, Room 3008

Abstract:                     Multiple antennas at the transmitters and
receivers in a multiple access channel (MAC) can provide simultaneous
diversity, spatial multiplexing and space-division multiple access
gains. The fundamental tradeoff in the asymptotically large SNR regime
is shown by Tse et al (2004). On the other hand, MAC scheduling can
provide a statistical multiplexing gain to improve the delay performance
as shown by Bertsimas et al (1998). In this talk, we formulate and
analytically derive an optimal operating point for MIMO-MAC channel for
bursty sources with delay constraints. Our system model brings together
the four types of gains: diversity, spatial multiplexing, space-division
multiple-access provided at the PHY layer, and statistical multiplexing
gains at the MAC layer.

Our objective is to minimize the end-to-end performance as defined by
the delay bound violation probability as well as the channel decoding
error probability. We find the optimal diversity gain and rate region in
which the system should operate. In this, we note an interesting
interplay between the intensity of the traffic and resource pooling with
regard to both multiple-access and statistical multiplexing gains.
Furthermore, we use this methodology to discuss extensions to the issue
of cooperation in wireless networks.

Bio:                 Javidi studied electrical engineering at Sharif
University of Technology, Tehran, Iran from 1992 to 1996. She received
master's degrees in electrical engineering (systems), and applied
mathematics (stochastics) from the University of Michigan, Ann Arbor, in
1998 and 1999, respectively. She received her doctorate in electrical
engineering and computer science from the University of Michigan, Ann
Arbor, in May 2002.

>From 2002-2004, she was an assistant professor in the electrical
engineering department at the University of Washington, Seattle. She
joined the University of California, San Diego, in 2005, where she is
currently an assistant professor of electrical and computer engineering.
She was a Barbour Scholar during 1999-2000 academic year and received an
NSF CAREER Award in 2004.

Her research interests are in communication networks, stochastic
resource allocation, stochastic control theory, and wireless
communications.

 

 

 

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