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Events for February 02, 2007
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The Capacity of Interference Channels with Partial Transmitter Cooperation
Fri, Feb 02, 2007 @ 10:30 AM - 11:30 AM
Ming Hsieh Department of Electrical and Computer Engineering
Conferences, Lectures, & Seminars
SPEAKER: Professor Ivana Maric, Stanford UniversityABSTRACT: We present capacity regions for several two-sender, two-receiver channels with partial transmitter cooperation. First, we present the capacity regions for compound multiaccess channels (MACs) with common information and compound MACs with conferencing. Next, we consider two interference channel models; interference channels with common information and interference channels where the message sent by one of the encoders is known to the other encoder. The capacity regions of both of these channels are determined when there is "strong" interference, i.e., the interference is such that both receivers can decode all messages with no rate penalty. The resulting capacity regions thus coincide with the capacity region of the compound MAC with common information. HOST: Giuseppe Caire, caire@usc.edu
Location: Hughes Aircraft Electrical Engineering Center (EEB) - 248
Audiences: Everyone Is Invited
Contact: Mayumi Thrasher
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Decentralized Processing: An Information Theoretic Perspective
Fri, Feb 02, 2007 @ 11:30 AM - 12:30 PM
Ming Hsieh Department of Electrical and Computer Engineering
Conferences, Lectures, & Seminars
SPEAKER: Prof. Shlomo Shamai, Technion, Israel Institute of TechnologyAbstract: We discuss the scenario where remote nomadic users (or a single user) communicate to a destination via a set of intermediate agents. The agents are ignorant of the codebook used due to the nomadic regime and are connected to the destination via reliable links of finite capacity. We focus here on independent Gaussian channels to all agents, who are equipped with a single antenna while the transmitter or transmitters may posses multiple antennas.First we review the results associated with a single transmit antenna, invoking decentralized quantization, which yield the ultimate achievable rate, in the nomadic regime.For a multiantenna transmitter, upper and lower bounds on the achievable rate with Gaussian signalling are developed, and it is demonstrated that the full multiplexing gain of the system can potentially be maintained, even when the transmitter is denied the knowledge of the channel state information (corresponding fading coefficients). We also examine the asymptotic setting with the number of agents and transmit antennas (or users) taken to infinity, yet maintaining a fixed ratio. Here we demonstrate the incompetence of the simple compression when compared to a Wyner-Ziv based approach.Finally, we confine attention to the basic single antenna scheme with two agents and consider the impact of a finite capacity feedback link from the final destination to the agents, allowing for a single round of conferencing. Network coding is optimal here in the sense of facilitating the full exploitation of the conferencing phase on the feedback link (from the destination to the agents). The impact of this conferencing protocol on the ultimate performance is quantified, and implications of layered coding in this scenario are also considered.Bio: Shlomo Shamai (Shitz) is the William Fondiller Professor of Telecommunication at the Department of Electrical Engineering, Technion---Israel Institute of Technology, where he has been on the faculty since 1986. His research interests encompasses a wide spectrum of topics in information theory and statistical communications.Prof. Shamai is an IEEE Fellow and 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. He is also the recipient of the 2000 Technion Henry Taub Prize for Excellence in Research. He has served as Associate Editor for 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
Location: Hughes Aircraft Electrical Engineering Center (EEB) - 248
Audiences: Everyone Is Invited
Contact: Mayumi Thrasher
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Networking Workshop
Fri, Feb 02, 2007 @ 12:30 PM - 02:00 PM
Viterbi School of Engineering Student Affairs
Workshops & Infosessions
Come learn about the importance of networking, and how to grow your network through an interactive workshop where you'll learn to create your elevator pitch and get the opportunity to practice this valuable skill in a friendly environment.Lunch will be provided! Please RSVSP to viterbi.ced@usc.edu by Wednesday January 31st. This workshop will be facilitated by Michelle Cipolla, NSS College Relations Lead for BAE Systems - Electronics & Integrated Solutions.E&IS designs, develops, produces, and supports electronic systems and subsystems for military and commercial applications. For more information about BAE visit http://www.eis.na.baesystems.com
Location: Ronald Tutor Hall of Engineering (RTH) - 211
Audiences: Undergrad
Contact: Traci Thomas Navarro
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Materials Science Seminar
Fri, Feb 02, 2007 @ 02:45 PM
Mork Family Department of Chemical Engineering and Materials Science
Conferences, Lectures, & Seminars
THE MORK FAMILY DEPARTMENT OF CHEMICAL ENGINEERING AND MATERIALS SCIENCEPresents:Microscale Flow and Transport Problems arising in Surfactant Rheology, Printing Processes, and Polymer ElectrophoresisBy:Professor Satish Kumar
Department of Chemical Engineering and Materials Science
University of MinnesotaAbstractFluid flow and transport processes occurring on length scales of microns or less often involve phenomena which are unimportant at larger length scales. Although such phenomena can complicate our ability to understand and design microscale flow and transport processes, they also offer opportunities to engineer novel and useful effects. Three examples will be presented in this talk in support of this idea. In the first example, we consider an instability that arises when a fluid flows past a soft elastic solid. Experiments and theory suggest that this instability is responsible for certain rheological phenomena observed in surfactant solutions, and that it may also be useful for enhancing mixing in microscale flows. In the second example, we consider the displacement of one thin liquid film by another on a chemically patterned surface. Numerical simulations using a lubrication-theory-based model indicate a mechanism by which one liquid can be emulsified into the other, a step which is known to play a key role in lithographic printing processes. In the third example, we consider polymer electrophoresis through a narrow constriction. Brownian dynamics simulations show that the relationship between chain transit velocity and chain length depends in a sensitive way on the constriction geometry and applied electric field strength, and is controlled by an interplay between three distinct time scales.2:45-3:30 PM
(Refreshments will be served at 2:30 PM)First year MASC students are required to attend.Location: John Stauffer Science Lecture Hall (SLH) - 102
Audiences: Everyone Is Invited
Contact: Petra Pearce
