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Conferences, Lectures, & Seminars
Events for February
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Joint Source-Channel Coding Fundamentals by Tor A. Ramstad
Tue, Feb 03, 2009 @ 11:00 AM - 12:00 PM
Ming Hsieh Department of Electrical and Computer Engineering
Conferences, Lectures, & Seminars
Joint source-channel coding (JSCC) is promising for practical delays and complexities, as opposed to Shannon's separation theorem which states that source and channel coding can be done separately, but in general
at the cost of infinite delay and complexity.Our approach to JSCC is based on direct mappings (Shannon-Kotelnikov mappings) from the source, represented by its samples, to channel samples, thus avoiding any form of bit representation.We will first review "optimal performance theoretically attainable" (OPTA), which imposes bandwidth stretching between source and channel signals. But this also leads us to a way to optimize linear systems. The
most general case considered consists of subband decomposition, reshuffling of channels and finally OFDM transmission.We then introduce the principles of nonlinear mappings. Some optimized mappings will be shown, and we will demonstrate a system for image transmission based on subband decomposition and use of several dimension
changing mappings which are allocated according to the necessary bandwidth change among the components.Bio: Professor Tor A. Ramstad received his MSc and PhD degrees from the Norwegian Institute of Technology (now the Norwegian University of Science and Technology (NTNU)) in 1968 and 1971, respectively. He
became a full professor in 1983 at what is now called the Faculty of Informatics, Mathematics and Electrical Engineering. He is presently a visiting scholar at University of California, Santa Barbara.His research interests include multirate signal processing, speech and image processing with emphasis on image and video communications, where joint source-channel coding is central. Low power communication for medical
sensor networks is presently the main research topic.Host: Dr. Sanjit MitraLocation: Hughes Aircraft Electrical Engineering Center (EEB) - 248
Audiences: Everyone Is Invited
Contact: Gloria Halfacre
This event is open to all eligible individuals. USC Viterbi operates all of its activities consistent with the University's Notice of Non-Discrimination. Eligibility is not determined based on race, sex, ethnicity, sexual orientation, or any other prohibited factor. -
Theory and Practice of Lossy Joint Source-Channel Coding
Fri, Feb 06, 2009 @ 10:30 AM - 11:30 AM
Ming Hsieh Department of Electrical and Computer Engineering
Conferences, Lectures, & Seminars
Speaker: Maria Fresia
Princeton UniversityAbstract: With the communication revolution, the number of mobile, satellite and computer communication systems has grown exponentially with the consequence that the available bandwidth for each service is shrinking. The Shannon source-channel separation principle, a milestone on efficient data transmission, states that the optimal performance can be approached by independently designing the source and the channel codes. Driven by this principle, modern communication systems have been developed accordingly. However, the existing source coding schemes exhibit catastrophic behavior with respect to channel errors, thus inducing a significant sub-optimality in the overall transmission system. In this talk a practical lossy joint source-channel coding approach, aimed at avoiding this catastrophic behavior is presented. Applications of the proposed approach to point-to-point images transmission and to the broadcasting scenario, where several users have to receive data generated from common sources, are illustrated.Biography: Dr. Fresia received the laurea degree (eqv. M. Sc.) in Telecommunications Engineering and the Ph.D. degree in Electronic and Computer Engineering from the University of Genova, Italy in 2002 and 2006 respectively. From September 2006 to September 2007 she was postdoctoral research associate at the Department of Electrical Engineering at the University of Louvain la Neuve, Belgium (in collaboration with Prof. Luc Vandendorpe). She is currently a postdoctoral research associate at the Department of Electrical Engineering at Princeton University (in collaboration with Professor H. V. Poor). Her research interests include coding theory and signal processing with particular interest to joint source-channel coding, distributed source coding and unequal error protection for embedded images transmission.Host: Giuseppe Caire, caire@usc.edu, EEB 528, x07326
Location: Hughes Aircraft Electrical Engineering Center (EEB) - 248
Audiences: Everyone Is Invited
Contact: Gerrielyn Ramos
This event is open to all eligible individuals. USC Viterbi operates all of its activities consistent with the University's Notice of Non-Discrimination. Eligibility is not determined based on race, sex, ethnicity, sexual orientation, or any other prohibited factor. -
Best Practices for a Job Search
Fri, Feb 06, 2009 @ 11:30 AM - 01:00 PM
Ming Hsieh Department of Electrical and Computer Engineering
Conferences, Lectures, & Seminars
EE Students 'Practical Guide' Seminar SeriesSeminar Leaders: Profs. Martin Gundersen and C.-C. Jay KuoDate: Friday, February 6, 11:30 am - 1 pmNew Location:
11:30am - East side of EEB (between SAL and EEB)
12:00pm - EEB 248Website: http://ee.usc.edu/news/practical-guide/* Pizza will be provided by the EE Department.*Abstract: When you are close to graduation, one main goal is to find a good job. There are quite a few things to learn when you are job hunting. Undergraduate activities including research can have a significant impact on the opportunities for graduating students who seek challenging and productive careers. We will present specific examples of undergraduate students who have found career opportunities that resulted from their undergraduate research experience. This seminar will cover several key issues such as the preparation of your resume and telephone and on-site interviews. In addition if you get multiple offers, you will need to make decision which offer to take and learn some negotiation skills. These considerations will also be addressed.Audiences: Everyone Is Invited
Contact: Gerrielyn Ramos
This event is open to all eligible individuals. USC Viterbi operates all of its activities consistent with the University's Notice of Non-Discrimination. Eligibility is not determined based on race, sex, ethnicity, sexual orientation, or any other prohibited factor. -
Munushian Lecture: Charles Townes on How the Laser Happened
Wed, Feb 11, 2009 @ 03:30 PM - 05:15 PM
Ming Hsieh Department of Electrical and Computer Engineering
Conferences, Lectures, & Seminars
Nobel Laureate (Physics, 1964) Charles Townes speaks about the intersection of physics and electrical engineering," and the invention of the laser -- about how the interaction between physics and engineering and other fields, is important in originating new ideas, with the creation of the laser as case-in-point. Dr. Townes served as Provost and Professor of Physics at the Massachusetts Institute of Technology. In 1966, he became Institute Professor at M.I.T., and later in the same year resigned from the position of Provost in order to return to more intensive research, particularly in the fields of quantum electronics and astronomy. He was appointed University Professor at the University of California in 1967. In this position Dr. Townes is participating in teaching, research, and other activities on several campuses of the University, although he is located at the Berkeley campus.In addition to the Nobel Prize, Townes has received the Templeton Prize, for contributions to the understanding of religion, and a number of other prizes as well as 27 honorary degrees from various universities.Reception, 3:30 p.m., Lecture begins at 4.
Location: Leonard Davis Auditorium (GER 124)
Audiences: Everyone Is Invited
Contact: Eric Mankin
This event is open to all eligible individuals. USC Viterbi operates all of its activities consistent with the University's Notice of Non-Discrimination. Eligibility is not determined based on race, sex, ethnicity, sexual orientation, or any other prohibited factor. -
Maximal Transmission Rate for Finite Blocklength
Fri, Feb 13, 2009 @ 11:00 AM - 12:00 PM
Ming Hsieh Department of Electrical and Computer Engineering
Conferences, Lectures, & Seminars
Speaker: Sergio Verdú
Princeton UniversityAbstract: How much do we need to back off from channel capacity when the blocklength is equal to 1000?Biography: Sergio Verdú is a Professor of Electrical Engineering at Princeton University where he teaches and conducts research on information theory in the Information Sciences and Systems Group. He is also affiliated with the Program in Applied and Computational Mathematics. A native of Barcelona, Spain, Sergio Verdú received the Telecommunications Engineering degree from the Polytechnic University of Catalonia, Barcelona, Spain, in 1980 and the Ph.D. degree in Electrical Engineering from the University of Illinois at Urbana-Champaign in 1984. Conducted at the Coordinated Science Laboratory of the University of Illinois, his doctoral research pioneered the field of Multiuser Detection. Sergio Verdú was elected Fellow of the IEEE in 1992 and member of the U. S. National Academy of Engineering in 2007. He received the 2000 Frederick E. Terman Award from the American Society for Engineering Education, and the IEEE Third Millennium Medal in 2000. In 2005, he received a Doctorate Honoris Causa from the Polytechnic University of Catalonia. He is the recipient of the 2007 Claude E. Shannon Award, and the 2008 IEEE Richard W. Hamming Medal. In 1998, Cambridge University Press published his book ``Multiuser Detection.'' His papers have received several awards: the 1992 IEEE Donald Fink Paper Award, the 1998 Information Theory Outstanding Paper Award, a IEEE Information Theory Golden Jubilee Paper Award, the 2000 Paper Award from the Japan Telecommunications Advancement Foundation, the 2002 Leonard G. Abraham Prize Award in the field of Communications Systems and the 2007 IEEE Joint Communications/Information Theory Paper Award. Sergio Verdú has served as Associate Editor of the IEEE Trans. on Automatic Control, and as Associate Editor for Shannon Theory of the IEEE Transactions on Information Theory. He served as President of the IEEE Information Theory Society in 1997. He is currently Editor-in-Chief of Foundations and Trends in Communications and Information Theory. He has held visiting appointments at the Australian National University, the Technion-Israel Institute of Technology, and the University of Tokyo. In 1998 he was Visiting Professor at the Electrical Engineering and Computer Science Department of the University of California, Berkeley, and in 2002 he held the Hewlett-Packard Visiting Research Professorship at the Mathematical Sciences Research Institute, Berkeley.Host: Giuseppe Caire, caire@usc.edu, EEB 528, x07326
Location: Hughes Aircraft Electrical Engineering Center (EEB) - 248
Audiences: Everyone Is Invited
Contact: Gerrielyn Ramos
This event is open to all eligible individuals. USC Viterbi operates all of its activities consistent with the University's Notice of Non-Discrimination. Eligibility is not determined based on race, sex, ethnicity, sexual orientation, or any other prohibited factor. -
Joint Multiple Cell-Site Processing in Wyner-like Fading Models
Fri, Feb 13, 2009 @ 02:00 PM - 03:30 PM
Ming Hsieh Department of Electrical and Computer Engineering
Conferences, Lectures, & Seminars
Speaker: Shlomo Shamai
EE Dept, Technion, Haifa, IsraelAbstract: We investigate the information theoretic aspects of a simple cellular model, where users experience a soft-handoff situation under joint multicell decoding. The ultimate sum-rate limits of reliable communications in this model in non-fading and fading situations, are presented. Focus is put on the uplink in the high snr regime, with general fading statistics. In this case, adhering to a TDMA intra-cell protocol, a novel closed form expression for the per-cell sum-rate is developed. The result is based on study of the spectrum of certain large random Hermitian tri-diagonal Jacobi matrices. Specifically, since the matrices of interest are tridiagonal, their eigenvectors can be considered as sequences with second order linear recurrence. Therefore, the problem is reduced to the study of the exponential growth of products of two by two matrices. For the case where K users are simultaneously active in each cell, we obtain a series of lower and upper bounds on the high-SNR power offset of the per-cell sum-rate, which are considerably tighter than previously known bounds. The technique can be adapted to generalized Wyner-like cellular models. We examine also special cases of zero/one dependent (per user) `fading` structures to analyze in the impact of users' activity in a `soft handoff` Wyner model. In this case close form expressions are developed for respective capacities in the outage regime, addressing also ergodic case. Time permitting, duality principles that relate the uplink performance to the downlink are discussed, mentioning the results for unfaded and faded cases, and pointing out some open problems.Biography: Shlomo Shamai (Shitz) (S'80–M'82–SM'89–F'94) received the B.Sc., M.Sc., and Ph.D. degrees in electrical engineering from the Technion—Israel Institute of Technology, in 1975, 1981 and 1986 respectively. During 1975-1985 he was with the Communications Research Labs in the capacity of a Senior Research Engineer. Since 1986 he is with the Department of Electrical Engineering, Technion—Israel Institute of Technology, where he is now the William Fondiller Professor of Telecommunications. His research interests encompass a wide spectrum of topics in information theory and statistical communications. He is especially interested in theoretical limits in communication with practical constraints, multi-user information theory and spread spectrum systems, multiple-input-multiple-output communications systems, information theoretic models for wireless networks and systems, information theoretic aspects of magnetic recording, channel coding, combined modulation and coding, turbo codes and LDPC, in channel, source, and combined source-channel applications, iterative detection and decoding algorithms, coherent and noncoherent detection and information theoretic aspects of digital communication in optical channels. Dr. Shamai (Shitz) is a member of the Union Radio Scientifique Internationale (URSI). He is the recipient of the 1999 van der Pol Gold Medal of URSI, and a co-recipient of the 2000 IEEE Donald G. Fink Prize Paper Award, the 2003, and the 2004 Joint IT/COM Societies Paper Award, and the 2007 Information Theory Society Paper Award. He is also the recipient of the 1985 Alon Grant for distinguished young scientists and the 2000 Technion Henry Taub Prize for Excellence in Research. He has served as Associate Editor for the Shannon Theory of the IEEE Transactions on Information Theory, and also serves on the Board of Governors of the Information Theory Society.Host: Giuseppe Caire, caire@usc.edu, EEB 528, x07326Location: Hughes Aircraft Electrical Engineering Center (EEB) - 248
Audiences: Everyone Is Invited
Contact: Gerrielyn Ramos
This event is open to all eligible individuals. USC Viterbi operates all of its activities consistent with the University's Notice of Non-Discrimination. Eligibility is not determined based on race, sex, ethnicity, sexual orientation, or any other prohibited factor. -
Power Controlled Feedback and Training for Two-way MIMO Channels
Fri, Feb 20, 2009 @ 03:30 PM - 04:30 PM
Ming Hsieh Department of Electrical and Computer Engineering
Conferences, Lectures, & Seminars
SPEAKER: Ashu Sabharwal
Rice UniversityABSTRACT: Interactive communication systems (cellular, WiFi etc) consist of transceivers, not simply transmitters and receivers. This naturally leads to a two-way channel, where both nodes in a communication system share the system resources, and use multi-round protocols to facilitate communication. Surprisingly, our understanding of this basic communication construct is rather limited.In this talk, we will study the two-way fading channel to understand noise corrupted feedback in communication systems. The noise in the feedback links leads to mismatch in the shared knowledge of the transmitter and the receiver, leading to potential outages in transmission. In the process of analyzing two-way fading channels, we show that two new concepts of power-controlled feedback and power-controlled training feedback naturally come up.BIO: Ashutosh Sabharwal received his B.Tech from Indian Institute of Technology, New Delhi in 1993. He graduated from The Ohio State University with a MS in 1995 and PhD in 1999. Currently he is an Assistant Professor at Rice, where he also the Director of Center for Multimedia Communication. His main research interests are information theoretic foundations, protocols and platforms for high performance wireless networks.HOST: Urbashi Mitra, ubli@usc.edu, EEB 540, x04667
Location: Hughes Aircraft Electrical Engineering Center (EEB) - B18
Audiences: Everyone Is Invited
Contact: Gerrielyn Ramos
This event is open to all eligible individuals. USC Viterbi operates all of its activities consistent with the University's Notice of Non-Discrimination. Eligibility is not determined based on race, sex, ethnicity, sexual orientation, or any other prohibited factor. -
Integrated Sys Seminar-Convergence of circuits, EM in mm/sub-mmWave regimes(Dr. Babakhani, Caltech)
Fri, Feb 27, 2009 @ 02:00 PM - 03:00 PM
Ming Hsieh Department of Electrical and Computer Engineering
Conferences, Lectures, & Seminars
Speaker - Dr. Aydin Babakhani (Caltech)
Location: Hughes Aircraft Electrical Engineering Center (EEB) - 248
Audiences: Everyone Is Invited
Contact: Hossein Hashemi
This event is open to all eligible individuals. USC Viterbi operates all of its activities consistent with the University's Notice of Non-Discrimination. Eligibility is not determined based on race, sex, ethnicity, sexual orientation, or any other prohibited factor.
