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UW-Madison
COMPUTATIONAL SCIENCES LECTURE SERIES (CSLS)

Fifth meeting in the series:
Trends in Wireless Communication

Monday, 18 April 2005
1:15 - 4:45 PM
1610 Engineering Hall

According to the International Association for the Wireless Industry CTIA, there were 180 million mobile phone subscribers in the U.S. at the end of 2004. Worldwide, there will soon be 2 billion subscribers. From these figures it is not difficult to see that wireless communication, a technology that is based on the interplay of many sciences, is revolutionizing the way we communicate. In this workshop, three experts in wireless communication will discuss mathematical, technical, algorithmic, and protocol issues that made wireless communication possible and that will enable future wireless systems with more throughput, wider coverage, higher reliability, and new applications.

SCHEDULE | ABSTRACTS/BIOS | VIDEOS*

*Note about viewing videos for Mac users: Currently the videos may only be viewed using the Internet Explorer browser. 

1:15 - 2:15
"Approximately Universal Codes over Slow Fading Wireless Channels"
Pramod Viswanath

2:30 - 3:30
"Quantum Computing and Cellular Phones"
Rob Calderbank

3:45 - 4:45
"Proactive Design for Multimedia Communication Systems with Resource and Information Exchanges"
Mihaela van der Schaar

ABSTRACTS / BIOS
 

"Approximately Universal Codes over Slow Fading Wireless Channels"
Pramod Viswanath
, University of Illinois at Urbana-Champaign


Abstract: The tradeoff between data rate and reliability of reception is a fundamental issue in theory and practice of communication. In this talk, we try to understand the nature of this tradeoff in a slow fading wireless channel. In particular, we will precisely characterize codes that optimally tradeoff these two quantities for every statistical characterization of the wireless channel. This characterization is then used to construct new coding schemes as well as to show optimality of several schemes proposed in the space-time coding literature.

Bio: Pramod Viswanath received the PhD degree in EECS from the University of California at Berkeley in 2000. He was a member of technical staff at Flarion Technologies until August 2001 before joining the ECE department at the University of Illinois at Urbana-Champaign. He is a recipient of the Eliahu Jury Award from the EECS department of UC Berkeley (2000), the Bernard Friedman Award from the Mathematics department of UC Berkeley (2000), and the NSF CAREER Award (2003).



"Quantum Computing and Cellular Phones "
Rob Calderbank, Princeton University


Abstract: Multiple antennas are transforming the rate, reliability and reach of wireless systems. Quantum computers are calling into question the security of cryptosystems where security rests on the presumed intractability of factoring. The speaker, Dr. Robert Calderbank, an AT&T Fellow and co-inventor of space-time codes, will use nineteenth century mathematics to connect these two breakthrough technologies.

Bio: Robert Calderbank is a Professor of Electrical Engineering and Mathematics at Princeton University where he directs the Program in Applied and Computational Mathematics. He joined Princeton from AT&T where he was Vice President for Research and responsible for designing the only Research Lab in the world where the primary focus is data. Inventions by Dr. Calderbank in his career at Bell Labs and AT&T have transformed communications practice in voiceband modems, advanced read channels for magnetic recording, and wireless systems. He also created the framework for fault tolerant quantum computation together with Peter Shor. Dr. Calderbank was honored by the IEEE Information Theory Prize Paper Award in 1995 for his work on the Z 4 linearity of Kerdock and Preparata Codes (joint with A.R. Hammons Jr., P.V. Kumar, N.J.A. Sloane, and P. Sole), and again in 1999 for the invention of space-time codes (joint with V. Tarokh and N. Seshadri). He became an AT&T Fellow in 2000, received the IEEE Millennium Medal in 2000, and was elected to the National Academy of Engineering in 2005.



"Proactive Design for Multimedia Communication Systems with Resource and Information Exchanges"
Mihaela van der Schaar, University of California at Davis


Click this link to read Dr van der Schaar's full abstract and bio in PDF.


Partial Abstract
:
Due to their flexible and low cost infrastructure, the Internet and wireless networks are poised to enable a variety of multimedia applications, such as videoconferencing, emergency services, surveillance, telemedicine, remote teaching and training, augmented reality, and distributed gaming. However, these networks provide dynamically varying resources with only limited support for the Quality of Service required by the delay-sensitive, bandwidth-intense and loss-tolerant multimedia applications . This variability of resources does not significantly impact delay-insensitive applications (e.g., file transfers), but has considerable consequences for multimedia applications and often leads to unsatisfactory user experience.

To address these challenges, my research is focused on investigating the theory, algorithm design, implementation, and performance analysis of realistic multimedia systems, in order to gain new insights on what basic principles underlie efficient designs, and use these insights to advance the theory and tool-set for building optimized multimedia compression and transmission algorithms, theories and applications.

In this talk, I will discuss a new proactive algorithm and system design that fundamentally changes the non-collaborative way in which competing wireless stations currently interact, by allowing them to exchange information and resources to improve the performance of multimedia applications. 

Bio: Mihaela van der Schaar received the M.Sc. and Ph.D. degrees in Electrical Engineering from Eindhoven University of Technology, Eindhoven, The Netherlands. She is currently an Assistant Professor in the Electrical and Computer Engineering Department at University of California, Davis. Between 1996 and June 2003, she was a senior member research staff at Philips Research in the Netherlands and USA, where she led a team of researchers working on scalable video coding, networking, and streaming algorithms and multimedia architectures. From January to September 2003, she was also an Adjunct Assistant Professor at Columbia University. She is also an active participant in the MPEG video standardization for which she received two ISO awards. She is currently chairing the ad-hoc group aimed at standardizing the next-generation video compression technology entitled MPEG Scalable Video Coding as well as the ad-hoc group on Interframe Wavelet Video Coding exploration activity.



Videos of the lectures are now available. Click here.

For more information about the CSLS Workshops, please contact Nigel Boston, Robert Nowak, or Steve Wright.

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