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Conferences, Lectures, & Seminars
Events for February
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Design and Optimization of Total System Power Constrained Communication Systems
Mon, Feb 01, 2010 @ 01:30 PM - 03:00 PM
Ming Hsieh Department of Electrical and Computer Engineering
Conferences, Lectures, & Seminars
Presented by Dr. Amir Amirkhany Abstract:
The demand for ever higher performance at lower power is motivating system designers to re-think their design strategies not just in terms of performance, but in terms of joint power-performance efficiency. In this new design paradigm, the performance of a communication system is mainly limited by the "total system power" constraint rather than just the "transmit power". Therefore, the choice of the optimum data communication algorithm is a strong function of circuit level power-performance trade-offs. Techniques from signal processing can be further applied to devise analysis and characterization techniques that complement system and circuit design. This talk draws examples of the different steps of this type of system level optimization approach from an effort to devise a multi-tone technique, called Analog Multi-Tone (AMT), for high-speed electrical links. Multi Gb/s chip-to-chip links find applications in the data interfaces between microprocessors, memories, peripherals, and network processing components in high performance systems. The talk starts with an overview of AMT signaling and how algorithm design is tailored to the characteristics of high-speed links. We continue by briefly reviewing the development of a mathematical analysis of this system including a convex framework, and closed-form jitter modeling. We then show how Least-Squares based techniques can be applied to define relevant metrics for the characterization a 24-Gb/s prototype AMT transmitter and enable digital compensation of time-variant non-idealities in the 4-way interleaved system. The talk will conclude with a review of other applications and systems that can benefit from this system-level optimization approach. Biography:
Amir Amirkhany received the Ph.D. degree from Stanford University in 2007, the M.Sc. degree from the University of California, Los Angeles, in 2002, and the B.Sc. degree from Sharif University of Technology, Tehran, Iran, in 1999, all in Electrical Engineering. He is currently a Senior Member of Technical Staff at Rambus Inc., Los Altos, CA, designing next generation high-speed memory interfaces for graphics applications. Prior to Stanford, he was with Sequoia Communications, working on the ASIC design of WCDMA systems. His main research interests include the design and implementation of communication systems, circuit design, and application of communication and signal processing techniques to the design of low power circuits.
Dr. Amirkhany was a recipient of a Best Student Paper Award at the IEEE Global Communications Conference in 2006 for his work on the design and analysis of an analog multi-tone system for chip-to-chip interconnects. He is the inventor or a co-inventor on more than 10 U.S. and international patent applications in the area of high-speed electrical link.Location: Hughes Aircraft Electrical Engineering Center (EEB) - 248
Audiences: Everyone Is Invited
Contact: Hazel Xavier
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. -
PLASMONICS: FROM ARTIFICIAL MOLECULES TO REAL APPLICATIONS
Wed, Feb 03, 2010 @ 02:00 PM - 03:30 PM
Ming Hsieh Department of Electrical and Computer Engineering
Conferences, Lectures, & Seminars
Munushian Visiting Seminar Series
Presents Dr. Naomi J. Halas, Stanley C. Moore Professor at Rice University Abstract:
In recent years we have shown that certain metallic nanoparticles possess collective electronic resonances- known as plasmon resonances- that depend very sensitively on the shape of the nanostructure. This interesting observation has led to a fundamentally new paradigm- "Plasmon Hybridization"- where the collective electronic resonances in a metallic nanostructure can be understood to be a direct classical analog of the single electron wave functions of simple atoms and molecules. The Plasmon hybridization picture explains the tunability of nanoshells, a dielectric core, metallic shell nanoparticle which is the simplest nanostructure with tunable plasmon resonances. More importantly, it provides a nanoscale "design rule" for understanding the plasmon resonances in an entirely new family of plasmonic nanostructures, and for the coupling of plasmonic nanostructures to meso- and macroscopic structures such as nanowires, thin metallic films, or other structures. Controlling the resonant optical properties of nanostructures allows one to control the local field at the nanostructure surface, so these structures can be thought of as precision optical components, although they are far smaller than a wavelength of light. We can exploit these new optical components in a variety of applications, ranging from dramatic enhancement of weakly emitting fluorescent media to label-free chemical detection. In addition, by tuning plasmon resonances into the near infrared region of the spectrum, the physiological "water window" can be accessed, where blood is essentially transparent and light penetrates maximally through human tissue. We have developed a suite of applications for plasmonic nanoparticles in biomedicine, including photothermal cancer therapy, currently in clinical trials. Biography:
Naomi Halas is the Stanley C. Moore Professor of Electrical and Computer Engineering at Rice University, where she also holds faculty appointments in the Departments of Physics, Chemistry, and Bioengineering. She joined Rice following a postdoctoral fellowship at AT&T Bell Laboratories. She is author of more than 180 refereed publications, has more than ten issued patents, and has presented more than 300 invited talks. She is best known scientifically as the inventor of nanoshells, nanoparticles with tunable optical resonances that span the visible and infrared regions of the spectrum. Halas has studied their properties and pursued applications of nanoshells in biomedicine and chemical sensing. She is co-founder of Nanospectra Biosciences, Inc., a company currently commercializing a photothermal cancer therapy based on nanoshells. She is founder and Director of the Laboratory for Nanophotonics (LANP) at Rice, which supports collaborations and interactions among researchers at Rice and other institutions nationally and internationally in the emerging field of Plasmon-based optics and applications. She is a Member of the American Academy of Arts and Sciences and a Fellow of five professional societies: the American Physical Society, the Optical Society of America, the International Society for Optical Engineering (SPIE), the Institute for Electrical and Electronics Engineers, and the American Association for the Advancement of Science. She is a Visiting Professor at the Institute of Physics, Chinese Academy of Sciences and an Associate Editor of Nano Letters.
Location: Hedco Petroleum and Chemical Engineering Building (HED) - co Neurosciences Building, HNB 100
Audiences: Everyone Is Invited
Contact: Hazel Xavier
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. -
An I-MMSE Perspective to the Capacity of the MIMO Gaussian Wiretap Channel
Fri, Feb 05, 2010 @ 11:00 AM - 12:00 PM
Ming Hsieh Department of Electrical and Computer Engineering
Conferences, Lectures, & Seminars
SPEAKER: Shlomo Shamai,
Department of Electrical Engineering,
Technion - Israel Institute of TechnologyABSTRACT: The fundamental relationship between information theory and estimation theory in the Gaussian channel, is used for an alternative derivation of the secrecy capacity of the multiple-input multiple-output (MIMO) Gaussian wiretap channel, under a power-covariance constraint.This approach yields closed form expressions in contrast to non-convex optimization based formulas provided by the standard different approaches (Khisti-Wornell, Oggier-Hassibi, Liu-Shamai). Furthermore, the input covariance matrix required in order to attain the capacity is specified, and the current technique provides also some insight into the concept of enhancement, and alternative expressions applied to this problem by Liu-Shamai. An alternative expression for the secrecy capacity of the MIMO Gaussian wiretap channel by Liu-Liu-Poor-Shamai is also examined via the information-estimation perspective. A short outlook will conclude the talk.
------------------------------------------------------------------------------------------------------------------------------------------------------------------The talk is based on a joint work with R. Bustin, Technion, R. Liu and V. Poor, Princeton University.
------------------------------------------------------------------------------------------------------------------------------------------------------------------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, x04683
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. -
Causal Video Coding Theory: Information Theoretic Basis for Future High Performance Real Time Video
Fri, Feb 05, 2010 @ 02:00 PM - 03:00 PM
Ming Hsieh Department of Electrical and Computer Engineering
Conferences, Lectures, & Seminars
Speaker: En-hui Yang,
University of WaterlooAbstract: Video coding standards have evolved from H.120 to H.261, H.262, H.263, and H.264 in the H.26x series and from MPEG-1 to MPEG-2, MPEG-4, and MPEG-4 Part 10 in the MPEG series. The newest video coding standard, H.264 (also called MPEG-4 Part 10), offers more than 40% rate reduction over H.263 while achieving the same visual quality. With the huge success of H.264, the video coding community is now working towards issuing a call for proposal to develop a new video coding standard which will probably be called H.265 with compression performance at least 40% better than H.264.In this talk, we will look further beyond H.265 and introduce a new video coding paradigm called causal video coding. (All existing video coding standards are based on a paradigm called predictive video coding, and H.265 will likely be the same.) We will examine the compression performance of causal video coding from an information theoretic point of view and present a surprising result---for video sequences other than sequences satisfying a Markov property, the more video frames need to be encoded for transmission in causal video coding, the less amount of data after encoding has to be actually sent! We will also demonstrate that causal video coding can indeed provide better compression performance than predictive video coding. Biography: After spending around three (3) years at the University of Southern California (working with Professor Zhen Zhang and others), En-hui Yang joined the Dept. of Electrical and Computer Engineering, University of Waterloo, Ontario, Canada in June 1997, where he is now a Professor and Canada Research Chair. He is a co-founder of SlipStream Data Inc. (now a subsidiary of Research In Motion). He currently also serves as an Associate Editor for IEEE Transactions on Information Theory (IT) and is sitting on the Awards Committee for IT. Dr. Yang is a recipient of several research awards and a Fellow of IEEE, the Canadian Academy of Engineering, and the Royal Society of Canada (The Academies of Arts, Humanities and Sciences of Canada). By luck, his research has had a (positive or negative) impact on the daily life of tens of millions people worldwide.Host: Zhen Zhang, zhzhang@usc.edu, EEB 508
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. -
Harnessing optical forces on a silicon chip nanomechanics meets nanophotonics
Fri, Feb 05, 2010 @ 02:00 PM - 03:30 PM
Ming Hsieh Department of Electrical and Computer Engineering
Conferences, Lectures, & Seminars
Presented by Dr.Mo Li
Department of Electrical Engineering, Yale UniversityAbstract:
The force exerted by photons is of fundamental importance in light-matter interactions. For example, optical tweezers have been widely used to manipulate atoms and microscale dielectric particles. This optical force was theoretically expected to be greatly enhanced in nanophotonic devices in which light intensity is highly concentrated. Recently, we reported the direct detection and exploitation of transverse gradient optical force in an integrated silicon photonic circuit. We showed that an NEMS resonator embedded in a silicon waveguide can be actuated efficiently by the optical force. We further experimentally proved theoretical predictions that this optical force is bipolar – its direction can be tuned to attractive or repulsive by changing the relative optical phase of coupled lightwaves. Subsequently, we have exploited optical forces in a variety of optomechanical structures, including photonic crystal and micro-disk optical resonators. Harnessing the optical force on a silicon chip will enable new nanophotonic and nanomechanical device functions, such as all-optical switching, tunable nanophotonic, radio-frequency photonics and large-scale integration of NEMS.Biography:
Mo Li currently is a postdoctoral associate in Department of Electrical Engineering at Yale University. He received Ph.D. (2007) in Applied Physics from Caltech, M.S. (2003) in Physics from UC San Diego, and B.S. (2001) in Physics from Univ. of Science and Technology of China (USTC). His primary research interests are nano-electromechanical systems (NEMS), nanophotonics, nano-optomechanical systems (NOMS) and integrated quantum photonics.Location: Seaver Science Library (SSL) - 150
Audiences: Everyone Is Invited
Contact: Hazel Xavier
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. -
Network Science: Power Grids, Wireless Communication, and Epidemics
Mon, Feb 08, 2010 @ 11:00 AM - 12:00 PM
Ming Hsieh Department of Electrical and Computer Engineering
Conferences, Lectures, & Seminars
Speaker: Edmund Yeh,
Yale UniversityAbstract: Over the past decade, there has been a concerted effort to develop a network science for studying physical, biological, social, and information networks within a common framework. Of particular interest is the understanding of connectivity, robustness, and information/epidemic dynamics in large-scale networks with spatial location and mobility. In this talk, we discuss a number of recent results from the application of network science ideas to electrical power grids, wireless communication networks, and the spread of epidemics.The security and stability of the electrical power grid is one of the major challenges facing society today. In power networks carrying load, the failure of one network node can result in redistribution of the load onto other nearby nodes. If these nodes fail due to excessive load, then this process can result in a cascading failure causing widespread power outage. Using the theory of percolation, we characterize the resilience of the power network in terms of whether correlated node failures lead to a large connected component of failed nodes or not. With this approach, we obtain analytic conditions on the existence or non-existence of correlated and cascading failures in power grids.Next, we study connectivity and information dissemination in large-scale wireless networks modelled by random geometric graphs with dynamic on-off links. Using a percolation-based perspective, we show that the delay for information dissemination exhibits two behavioral regimes, corresponding to a phase transition of the underlying network connectivity. When the dynamic network is in the subcritical phase, ignoring propagation delays, the dissemination delay scales linearly with the Euclidean distance between the sender and the receiver. When the dynamic network is in the supercritical phase, the delay scales sublinearly with the distance.Mobility is an essential aspect of information and epidemic networks. In these settings, the details of the mobility process is often not as essential as the pattern of network connectivity that the mobility induces. We develop a new framework for studying mobility which maps a network of mobile nodes to a network of stationary nodes with dynamic links. Using this framework, we characterize the rate of epidemic spread (e.g. H1N1) in mobile geometric networks (e.g. human contact networks).Joint work with Zhenning Kong.Biography: Edmund Yeh received his B.S. in Electrical Engineering with Distinction from Stanford University in 1994, his M.Phil in Engineering from the University of Cambridge in 1995, and his Ph.D. in Electrical Engineering and Computer Science from MIT in 2001. Since 2001, he has been on the faculty at Yale University, where he is currently an Associate Professor of Electrical Engineering (with joint appointments in Computer Science and Statistics).Host: Giuseppe Caire, caire@usc.edu, EEB 528, x04683
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. -
Cognitive Radio Channels: Capacity for Certain Discrete Memoryless Channels and Capacity to Within 1
Mon, Feb 08, 2010 @ 02:00 PM - 03:00 PM
Ming Hsieh Department of Electrical and Computer Engineering
Conferences, Lectures, & Seminars
Speaker: Stefano Rini,
Electrical and Computer Engineering,
University of Illinois at ChicagoAbstract: The capacity region of the interference channel in which one transmitter non-causally knows the message of the other, termed the cognitive channel, has remained open since its inception in 2005. A number of subtly differing achievable rate regions and outer bounds have been derived, some of which are tight under specific conditions. In this talk we present a new unified inner bound for the discrete memoryless cognitive interference channel that encompasses all known achievable rate regions. We also present an outer bound that unifies some known outer bounds. We show that our outer bound is tight for the deterministic linear high SNR approximation of the Gaussian cognitive channel, and that it gives capacity to within 1.8 bits for the Gaussian channel.Biography: Stefano Rini received his bachelor's degree in Computer Science from Politecnico di Milano, Como (Italy) in 2005. He is currently a PhD student in Electrical and Computer Engineering and a MA student in Statistics at the University of Illinois at Chicago, IL USA . He is an active researcher in multi-user information theory and cognitive networks.Host: Gerhard Kramer, gkramer@usc.edu, EEB 536, x07229
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. -
How Are Images Obtained from Measurements in X-ray-based Tomographic Imaging
Wed, Feb 10, 2010 @ 10:00 AM - 11:30 AM
Ming Hsieh Department of Electrical and Computer Engineering
Conferences, Lectures, & Seminars
Guest Speaker: Professor Xiaochuan Pan,
Ph.D., Department of Radiology
The University of Chicago Abstract: In the presentation, I will discuss some of recently developed analytic and optimization-based algorithms for image reconstruction in diagnostic CT, emerging cone-beam CT, and their implications for CT applications. A focus of the discussion will be on contrast of differences between analytic and optimization-based algorithms, on clarification of a number of issues, such as the relationship between the Nyquist sampling theorem and compressive sensing approach, and on elucidation of the impact of algorithm design and implementation on image quality. I will also devote some time to demonstrate that the utility of some existing metrics for image-quality evaluation can be limited and that the "mathematic exactness" of an algorithm can be an irrelevant metric for a meaningful evaluation of algorithms' performance in practical applications.Hosted by Professor Richard LeahyLocation: Hedco Petroleum and Chemical Engineering Building (HED) - 116
Audiences: Everyone Is Invited
Contact: Talyia Veal
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 Systems Seminar Series
Fri, Feb 12, 2010 @ 02:00 PM - 03:00 PM
Ming Hsieh Department of Electrical and Computer Engineering
Conferences, Lectures, & Seminars
Speaker: Dr. Qun Jane Gu, UCLATopic: RF/MMIC CMOS Circuits/Systems for Emerging Applications
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. -
RF/MMIC CMOS Circuits/Systems for Emerging Applications
Fri, Feb 12, 2010 @ 02:00 PM - 03:30 PM
Ming Hsieh Department of Electrical and Computer Engineering
Conferences, Lectures, & Seminars
Presented by Dr. Qun Jane Gu, UCLAAbstract:
Wide employment of emerging applications mandates low cost, high reliability systems, for which CMOS technology holds high potential due to its unprecedented integration capabilities. This talk will cover 3 emerging/projected applications by CMOS. The first one is high throughput, low overhead RF interconnect, which addresses the exponential increasing speed and bandwidth requirements for sophisticated systems such as Network-On-Chip, System-In-Package fueled by deep scaled CMOS technology. However, deep scaled CMOS technology has wide spread process corners and parameter variations, which degrade the circuits/systems yield and increase the cost. The second topic then focuses on System-on-Chip self-healing techniques to build a reliable, high yield CMOS 60GHz transceiver for multi-Gbps short range communications. Thanks to further boosted speed, CMOS begins to find its arena in the "missing THz gap" regime. The last part exemplifies some CMOS THz circuits for high potential THz imaging system for numerous applications: medical diagnosis, military, biology, astronomy etc.Biography:
Qun Jane Gu received the B.S. and M.S. from Huazhong University of Science and Technology, Wuhan, China, in 1997 and 2000, the M.S. from the University of Iowa, Iowa City, in 2002 and the Ph.D. from University of California, Los Angeles in 2007 all in electrical engineering. She received UCLA fellowship in 2003 and Dissertation Year Fellowship in 2007. After graduation, she joined Wionics Realtek research group as a senior design engineer on CMOS 60GHz transceiver for System-on-Chip. Since March 2009, she is a postdoctoral researcher in UCLA. Her research interest spans high efficiency, low power interconnect, mm-wave and sub-mm-wave integrated circuits and SoC design techniques, as well as CMOS THz imaging systems.Location: Hughes Aircraft Electrical Engineering Center (EEB) - 248
Audiences: Everyone Is Invited
Contact: Hazel Xavier
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. -
Regularisation in Multimodality Optical Tomography
Tue, Feb 16, 2010 @ 10:00 AM - 11:30 AM
Ming Hsieh Department of Electrical and Computer Engineering
Conferences, Lectures, & Seminars
Speaker: Professor Simon Arridge,
Centre for Medical Image Computing,
University College LondonAbstract: Optical Tomography in highly scattering media is non-linear and severely ill-posed. An increasingly widely used approach for image reconstruction is a parameter estimation method based on optimisation of a likelihood function. These kinds of problems always require regularization, which most generally should be interpreted in terms of Bayesian prior term.In this talk I will describe different regularisation techniques incorporating structural and statistical information. An emphasis will be placed on cross-constraints with an auxiliary image representing a multimodality approach.Hosted by Professor Richard LeahyLocation: Hughes Aircraft Electrical Engineering Center (EEB) - 248
Audiences: Everyone Is Invited
Contact: Talyia Veal
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. -
On Feasibility of Interference Alignment in MIMO Interference Networks...
Thu, Feb 18, 2010 @ 11:00 AM - 12:00 PM
Ming Hsieh Department of Electrical and Computer Engineering
Conferences, Lectures, & Seminars
and A New Training Protocol for Channel State Estimation in Wireless Relay NetworksSpeaker: Cenk M. Yetis,
Satellite Communications and Remote Sensing
Istanbul Technical University
Istanbul, TurkeyAbstract: In the first part of the talk, we explore the conditions required for interference alignment to be applied in a K-user MIMO interference network. Interference alignment is a recent popular scheme not only due to its ability to allocate 1/2 of the bandwidth for each user simultaneously (conventional schemes, e.g., TDMA and FDMA, can allocate 1/K of the bandwidth) but also due to its linearity (requires a simple design of transmit and receive beamforming vectors).
Cross-layer design with interference alignment by using the results of this work is an interesting future work. In addition, an extension of this work to X networks (every transmitter transmits to every receiver) and flexible X networks (every transmitter does not necessarily transmit to every receiver) is not trivial and more questions rise from cross-layer design aspect. In fact, bandwidth limit per user for flexible X networks is also an interesting future work from information theoretic aspect. Finally, an iterative algorithm for interference alignment in these networks is still an open problem. Approximate talk length is 30 minutes.
In the second part of the talk, we introduce a new training protocol for channel state estimation in wireless relay networks that provides a higher network capacity and a faster transfer of channel state information (CSI) than the existing training protocols.
Our approach enables us to obtain the effective SNR (eSNR) of a MIMO wireless relay network as a function of important parameters including the number of relays, antennas, and channel estimation errors. An interesting future work is the optimization of these and other important parameters for wireless relay networks including the training time, power, and structure in order to maximize the eSNR (thus the capacity). Approximate talk length is 20 minutes.Biography: Cenk M. Yetis received his B.Sc. degree in Electronics Engineering from Isik University, Istanbul, Turkey in 2001. He received his M.Sc. degree in Telecommunications Engineering from Istanbul Technical Univer-sity (ITU), Istanbul, Turkey in 2004. He expects to receive his Ph.D. degree in Satellite Remote Sensing and Communication from ITU in 2010. He received The Turkish Scientific and Technological Research Council of Turkey (TUBITAK) scholarship from 2005 to 2009. From 2003 to 2007, he was full-time employed by Avea, one of the top three wireless services providers in Turkey, where he held rotational responsibilities in operation and planning groups. Since 2007, he has been a visiting researcher abroad including Ohio State University and University of California Irvine. His research interests include signal processing, information theory, and communication theory for wireless communications. His detailed CV is available online at http://sites.google.com/site/cenkmyetis/.Host: Gerhard Kramer, gkramer@usc.edu, EEB 536, x07229
Location: Hughes Aircraft Electrical Engineering Center (EEB) - 539
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. -
Embracing the Power of Digital Logic for Future Mixed-Signal ICs
Fri, Feb 19, 2010 @ 10:00 AM - 11:30 AM
Ming Hsieh Department of Electrical and Computer Engineering
Conferences, Lectures, & Seminars
Presented by Mike ChenAbstract:
Over the years, the main stream CMOS technology has been scaling in favor of digital circuits at an explosive speed. It imposes increasing design constraints for analog circuits, such as lower supply voltages, lower gain, leakage currents, and noise, etc. On the other hand, the future radios will demand higher complexity and tighter circuit specifications. Driven by these trends, a new design philosophy is proposed to redefine analog circuit topologies that involve an architectural rethinking, utilizing almost free digital circuits and faster device speed. In this talk, we will examine such opportunities specifically in the mixed-signal IC area. We will use phase locked loop (PLL) and analog-to-digital converter (ADC) as case studies, which are critical components to enable future complex system-on-chip (SOC) and mostly-digital system architectures. In both cases, the performance and cost are substantially improved by adopting the new design philosophy.Biography:
Mike Shuo-Wei Chen received the B.S. degree from National Taiwan University in 1998, and the M.S. and Ph.D. degree from the University of California, Berkeley in 2002 and 2006, all in Electrical Engineering. Since 2006, he has been working on mixed-signal and RF circuits for WLAN radios in Atheros communications. His current research interests include analog and mixed-signal ICs, communication system designs, and signal processing techniques for circuits and systems. Dr. Chen achieved an honourable mention in Asian Pacific Mathematics Olympiad, 1994. He was the recipient of UC Regents' Fellowship at UC Berkeley in 2000 and Analog Devices Outstanding Student Award in 2006.
Location: Grace Ford Salvatori Hall Of Letters, Arts & Sciences (GFS) - 101
Audiences: Everyone Is Invited
Contact: Hazel Xavier
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. -
Modeling, Control and Optimization of Integrated Fuel Cell Power Systems
Fri, Feb 19, 2010 @ 11:00 AM - 12:00 PM
Ming Hsieh Department of Electrical and Computer Engineering
Conferences, Lectures, & Seminars
Jing Sun
University of Michigan, Ann Arbor
Abstract:
Integrated fuel cell power systems, especially those incorporating energy recuperating devices, are often characterized by
synergetic interactions of heterogeneous subsystems; tight chemical, thermal, mechanical, and electrical couplings; and
complex and challenging control tasks. To maintain high efficiency, these systems often operate on or close to their
admissible boundary. In addition, there are many operational constraints, such as continuous fuel cell reactant supply and
reactor temperature limits, that have to be strictly enforced during transient operations.
In this presentation, we will discuss our recent research and development activities on modeling and control of integrated
solid oxide fuel cell (SOFC) power systems. We have focused our effort on developing control methodologies and tools that
can assure both highly efficient steady state operations and fast and safe transients. Control-oriented modeling for the
SOFC system will be discussed, in conjunction with the control development results. Dynamic analysis and control design of
a hybrid SOFC and gas turbine power system will be presented. Real-time simulation and optimization efforts will also be
covered.
Bio:
About the speaker: Prof. Jing Sun received her Ph. D degree from University of Southern California in 1989. From 1989-1993, she was an assistant professor in the Electrical and Computer Engineering Department at Wayne State University.
She joined Ford Research Laboratory in 1993, where she worked on advanced powertrain system controls. After spending
almost 10 years in industry, she came back to academia in 2003 and joined the Naval Architecture and Marine Engineering
Department at the University of Michigan where she is a professor now. She holds 35 US patents and has co-authored (with
Petros Ioannou) a textbook on Robust Adaptive Control. She is an IEEE Fellow and one of the three recipients of the 2003
IEEE Control System Technology Award.
Host: Petros IoannouLocation: Hughes Aircraft Electrical Engineering Center (EEB) - 248
Audiences: Everyone Is Invited
Contact: Shane Goodoff
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. -
Graphene and Carbon Nanotube Electronics: Device Physics and Simulation
Wed, Feb 24, 2010 @ 02:00 PM - 03:30 PM
Ming Hsieh Department of Electrical and Computer Engineering
Conferences, Lectures, & Seminars
Presented by Jing Guo, University of FloridaAbstract: In recent years, significant progress has been achieved in graphene and carbon nanotube (CNT) electronics. In a graphene or carbon nanotube, low bias transport can be nearly ballistic. Deposition of high- gate insulators does not degrade the carrier mobility because of an absence of dangling bonds. The conduction and valence bands are symmetric, which is advantageous for complementary applications. The Excellent transport property promises high-speed transistor applications. Carbon-based nanostructures are receiving much attention for possible device applications. We have developed a self-consistent atomistic simulator for graphene and CNT field-effect transistors (FETs) based on the non-equilibrium Green's function (NEGF) formalism, and applied it to understand and explain experiments. The simulator provides an atomistic scale description for quantum transport in the presence of inelastic scattering and electron-photon interaction. We show that CNTFET is capable of delivering a near ballistic DC on-current even under high source-drain bias conditions. The radio frequency (RF) characteristics of CNTFETs are simulated for understanding potential high-speed transistor applications. On graphene electronics, we show that edge chemistry of graphene nanoribbons (GNRs) provides promising opportunities to engineer the device properties. Device physics and design options of GNR-based tunneling transistors are also examined by atomistic device simulations. Biography: Jing Guo received the Ph.D. degree in electrical engineering from Purdue University, West Lafayette, IN, and subsequently joined University of Florida as an assistant professor in Aug. 2004. His research interests focus on modeling and simulation of nanoscale devices with applications in electronics and optoelectronics, in close collaboration with experimentalists. He has published over sixty peer-reviewed journal papers on prestigious journals including Science, Nature, Phys. Rev. Lett., Nano Lett., Appl. Phys. Lett., Nature Nanotechnology, and IEEE Transactions. He is a recipient of the National Science Foundation (NSF) Faculty Early CAREER Award, and served in the technical program committee of International Electron Device Meeting (IEDM) and Device Research Conference (DRC). He is the coauthor of the book, "Nanoscale Transistors: Device Physics, Modeling, and Simulation" published by Springer.
Location: Kaprielian Hall (KAP) - 156
Audiences: Everyone Is Invited
Contact: Hazel Xavier
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. -
Merging Application and Circuit Knowledge for Innovative Circuit Design
Fri, Feb 26, 2010 @ 10:00 AM - 11:30 AM
Ming Hsieh Department of Electrical and Computer Engineering
Conferences, Lectures, & Seminars
Presented by Bita NezamfarAbstract: The continued scaling of CMOS technology has enabled incredible computing devices to be created, but has also pushed these devices to their energy dissipation limits. As a result, creating energy efficient systems has emerged as the dominant challenge for the foreseeable future. To make radical improvements to system efficiency, all degrees of freedom in the design need to be identified and exploited. In particular, for energy-efficient circuit design, this level of optimization is possible by understanding the source and nature of the constraints imposed both by technology and application and joint optimization of circuits and algorithms. This talk provides a few examples of how this merging of application and circuit knowledge makes it possible to improve efficiency. Our first example is building supply noise measurement circuits to measure and characterize high frequency supply noise on the chip. In theory, accurate sampling of high-frequency data requires high bandwidth and high resolution analog to digital converters. However, we will discuss how correct interpretation of system-level constraints enables using very simple and non-linear analog to digital converters to obtain all the required data to accurately characterize supply noise. As the next example we discuss the design of a "field-tunable" field-programmable gate array (FPGA). A state of the art FPGA is fairly optimized and resilient to change due to the large stack of software that is developed and optimized for the circuit-level architecture. We first show how interconnect blocks in the FPGA can change to add one more degree of programmability to the system without changing the interface to the higher-level software. This additional degree of freedom enables the FPGA to be programmed for high performance or low power in the field (post fabrication) based on the application of interest. We propose a new logic, called pseudo-static that can effectively utilize this degree of freedom while also improving FPGA performance. Measured results of a 90nm CMOS test-chip are presented and we conclude the talk by discussing a few other examples of application oriented circuit design.Biography: Bita Nezamfar received the Ph.D. and M.Sc. degrees from Stanford University, CA, in 2009 and 2004 respectively, and the B.Sc. degree from Sharif University of Technology, Tehran, Iran, all in electrical engineering. From 2003 to 2008, she was a Research Assistant with the VLSI Group, Stanford University, where she was involved with the design of on-chip supply noise measurement circuits, and energy performance tunable circuits. In summer of 2006, she was an intern with Aeluros Inc. where she worked on different blocks of a clock synthesizer chip. She is currently with Atheros Communications designing low-power analog circuits for wireless communications. Her research interests include application oriented circuit design and design and implementation of low power and high speed mixed signal systems.
Location: Seaver Science Library (SSL) - 150
Audiences: Everyone Is Invited
Contact: Hazel Xavier
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.
