Conferences, Lectures, & Seminars
Events for December
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Communications, Networks & Systems (CommNetS) Seminar
Fri, Dec 04, 2015 @ 11:00 AM - 12:00 PM
Ming Hsieh Department of Electrical and Computer Engineering
Conferences, Lectures, & Seminars
Speaker: Yi Ouyang, University of Michigan, Ann Arbor
Talk Title: A Common Information Based Multiple Access Protocol Achieving Full Throughput and Linear Delay
Series: CommNetS
Abstract: Multiple access communication has played a crucial role in the operation of many networked systems, including satellite networks, radio networks, wired/wireless Local Area Networks (LANs), and data centers. One important feature of multiple access communication is its decentralized information structure. In general, when multiple users share the communication system, coordination among them is essential to resolve collision issues. In the absence of a centralized controller, it is challenging to design efficient user coordination mechanisms.
We consider a typical slotted multiple access communication system where multiple users share a common collision channel. Each user is equipped with an infinite size buffer and observes Bernoulli arrivals to its own queue. In addition to the local information, all users receive a common broadcast feedback from the channel. The feedback indicates whether the previous transmission was successful, or it was a collision, or the channel was idle. The objective is to design a transmission protocol that effectively coordinates the users transmissions under the above described information structure.
In this talk, we propose a common information based multiple access protocol (CIMA) that uses the common channel feedback to coordinate users. In CIMA, each user constructs upper bounds on the lengths of the queues of all users, including itself, based on previous transmission strategies and the common feedback. Since the upper bounds are common knowledge, users can coordinate their transmission through these common upper bounds to avoid collision. We prove that without knowledge of any statistics, CIMA achieves the full throughput region of the collision channel. We also prove that the CIMA protocol incurs low transmission delay; the delay is upper-bounded by a linear function of the number of users.
Biography: Yi Ouyang received the B.S. degree in Electrical Engineering from the National Taiwan University, Taipei, Taiwan in 2009. He is currently a Ph.D. candidate in Electrical Engineering and Computer Science at the University of Michigan, Ann Arbor, MI, USA. His research interests include stochastic scheduling, decentralized stochastic control and dynamic stochastic games with asymmetric information.
Host: Dr. Ashutosh Nayyar
Location: Hughes Aircraft Electrical Engineering Center (EEB) - 248
Audiences: Everyone Is Invited
Contact: Annie Yu
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, Dec 04, 2015 @ 02:00 PM - 03:30 PM
Ming Hsieh Department of Electrical and Computer Engineering
Conferences, Lectures, & Seminars
Speaker: Prof. Andreas G. Andreou, IEEE Fellow, Johns Hopkins University
Talk Title: BRAINWAY: Cognitive Computing using Energy Efficient Physical Computational Structures, Algorithms and Architecture Co-Design
Series: Integrated Systems Seminar
Abstract: The BRAINWAY project in my lab is aimed at the design of an energy efficient Cognitive Processor Unit (CogPU) that combines Ultra-Low-Voltage (ULV) circuit techniques with brain-inspired chip multiprocessor network-on-chip (NoC) architecture, in 3D CMOS technology. The design of the CopPU architecture is based on the recently developed mathematical framework for architecture exploration and optimization, where neurons are abstracted as arithmetic units, processing information using stochastic or deterministic unary representations. Data in the system represent probabilities a choice that is well suited for probabilistic inference and machine learning. Such highly energy efficient CogPU inference engine will provide an energy efficiency gain of about x65 by using ULV techniques and massive parallelism, a gain of about x10 by relying on its SOC 3D DRAM, and a gain of about x15 by relying on new memory based Bayesian inference computational structures. This yields an estimate aggregate improvement factor in energy efficiency of about x10000, roughly four to five orders of magnitude with respect to present day state-of-the-art. Preliminary results from fabricated chips in the Global Foundries 55nm technology confirm our estimates and to the best of our knowledge these are the first CMOS computer architecture that computes natively with probabilities. I will discuss the design and experimental results from sub-systems of the architecture, representing processing units for exact and approximate Bayesian inference, multi-variate function approximation, including circuit details for mixed signal vector-vector multiplier units, physical random number generators and probability approximators
Biography: Dr. Andreas G. Andreou is a professor of electrical and computer engineering, computer science and the Whitaker Biomedical Engineering Institute, at Johns Hopkins University. Andreou is the cofounder of the Johns Hopkins University Center for Language and Speech Processing. Research in the Andreou lab is aimed at brain inspired microsystems for sensory information and human language processing. Notable microsystems achievements over the last 25 years, include a contrast sensitive silicon retina, the first CMOS polarization sensitive imager, silicon rods in standard foundry CMOS for single photon detection, hybrid silicon/silicone chip-scale incubator, and a large scale mixed analog/digital associative processor for character recognition. Significant algorithmic research contributions for speech recognition include the vocal tract normalization technique and heteroscedastic linear discriminant analysis, a derivation and generalization of Fisher discriminants in the maximum likelihood framework. In 1996 Andreou was elected as an IEEE Fellow, "for his contribution in energy efficient sensory Microsystems."
Host: Hosted by Prof. Hossein Hashemi, Prof. Mike Chen, and Prof. Mahta Moghaddam. Organized and hosted by SungWon Chung.
Location: Hughes Aircraft Electrical Engineering Center (EEB) - 248
Audiences: Everyone Is Invited
Contact: Elise Herrera-Green
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. -
Communications, Networks & Systems (CommNetS) Seminar
Thu, Dec 10, 2015 @ 02:00 PM - 03:00 PM
Ming Hsieh Department of Electrical and Computer Engineering
Conferences, Lectures, & Seminars
Speaker: Dr. Kaushik R. Chowdhury, Northeastern University
Talk Title: Perennial and Personalized Sensing through Wireless Energy Transfer and Intra-body Networks
Series: CommNetS
Abstract: As healthcare becomes personalized, we envision an environment where sensors may continuously report physiological data from both on- and intra-body locations. How to power such sensors without battery replacement and developing low-energy, safe communication methods pose a challenge. This talk describes recent advances in designing systems and protocols for wireless charging using using RF waves for the external sensors, and the use of weak electrical currents for data transfer from implants. It explores the fundamental tradeoffs that exist between achieving high data and recharging rates, constructive mixing of radiated signals, and the promise of simultaneous transfer of data over energy. On the implant side, advances in channel modeling and topology placement strategies are discussed with experimental results on low-overhead data transfers from an embedded implant to an on-skin relay node.
Biography: Prof. Kaushik R. Chowdhury received the MS degree in computer science from the University of Cincinnati, Cincinnati, OH, in 2006, and the PhD degree from the Georgia Institute of Technology, Atlanta, in 2009. He is currently Associate Professor in the Electrical and Computer Engineering Department at Northeastern University, Boston, MA. His research interests lie in dynamic spectrum access networks, energy harvesting, and intra-body communication. He received best paper awards at the IEEE ICC conference, in 2009, '12 and '13, and ICNC conference in 2013, as well as the NSF CAREER award in 2015. He is a senior member of the IEEE and the present Chair of the IEEE Technical Committee on Simulation.
Host: Dr. Ashutosh Nayyar
Location: Hughes Aircraft Electrical Engineering Center (EEB) - 248
Audiences: Everyone Is Invited
Contact: Annie Yu
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. -
Graph Signal Processing in the Spectral Domain: Filter Design, Denoising, and Applications
Fri, Dec 11, 2015 @ 11:00 AM - 12:00 PM
Ming Hsieh Department of Electrical and Computer Engineering
Conferences, Lectures, & Seminars
Speaker: Prof. Yuichi Tanaka, Tokyo University of Agriculture and Technology Tokyo, Japan
Talk Title: Graph Signal Processing in the Spectral Domain: Filter Design, Denoising, and Applications
Abstract: Graph signal processing (GSP) is an emerging field of signal and information processing. It aims to extract useful information from complex structured data. There are many potential application areas, e.g., sensor networks including IoT, smart grid, biomedical engineering, machine learning, computer vision/graphics, pattern recognition, bioinformatics, and geographic information systems. First, fundamentals of graph signal processing are briefly introduced in this talk, then some recent works on GSP in the graph spectral (graph Fourier) domain, which include wavelet/filter bank design, graph signal denoising, sensor placement in the GSP perspective, and EEG signal classification, will be presented.
Biography: Yuichi Tanaka received the B.E., M.E. and Ph.D. degrees in electrical engineering from Keio University, Yokohama, Japan, in 2003, 2005 and 2007, respectively. He was a Postdoctoral Scholar at Keio University, Yokohama, Japan, from 2007 to 2008, and supported by the Japan Society for the Promotion of Science (JSPS). From 2006 to 2008, he was also a visiting scholar at the University of California, San Diego (VideoProcessing Group supervised by Prof. T. Q. Nguyen). From 2008 to 2012, he was an Assistant Professor in the Department of Information Science, Utsunomiya University, Tochigi, Japan. Since 2012, he has been an Associate Professor in Graduate School of BASE, Tokyo University of Agriculture and Technology, Tokyo, Japan. His current research interests are in the field of multidimensional signal processing which includes: graph signal processing, image and video processing with computer vision techniques, distributed video coding, objective quality metric, and effective spatial-frequency transform design. Dr. Tanaka has been an Associate Editor of IEICE Trans. Fundamentals since 2013. Currently he is an elected member of the APSIPA Image, Video and Multimedia Technical Committee. He was a recipient of the Yasujiro Niwa Outstanding Paper Award in 2010, the TELECOM System Technology Award in 2011, and Ando Incentive Prize for the Study of Electronics in 2015. He also received APSIPA ASC 2014 Best Paper Award.
Host: Professor Antonio Ortega
Location: Hughes Aircraft Electrical Engineering Center (EEB) - 132
Audiences: Everyone Is Invited
Contact: Talyia White
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, Dec 11, 2015 @ 02:00 PM - 03:30 PM
Ming Hsieh Department of Electrical and Computer Engineering
Conferences, Lectures, & Seminars
Speaker: Prof. Jeyanandh Paramesh, Carnegie Mellon University
Talk Title: Ultra-wideband Millimeter-wave and Reconfigurable RF Integrated Circuits for Next Generation Communications
Series: Integrated Systems Seminar
Abstract: The demand for wireless capacity and data rates continues to grow unabated. In order to meet this demand, future communication systems will incorporate a mix of potential solutions, including reconfigurable, spectrum sharing radios in the low GHz bands, and (sub)mm-wave radios. This talk presents recent research aimed at addressing these challenges, including the design of ultra-wideband mm-wave beamformers, and their constituent circuit blocks. This talk will also present Carnegie Mellon's long-standing research on reconfigurable RF transceivers using phase-change vias, which offer reversible transformation between an extremely low on-resistance and an extremely high off-resistance, together with very low parasitic capacitance.
Biography: Dr. Jeyanandh Paramesh received the B.Tech, degree from IIT, Madras, the M.S degree from Oregon State University and the Ph.D degrees from the University of Washington, Seattle, all in Electrical Engineering. He is currently Associate Professor of Electrical and Computer Engineering at Carnegie Mellon University. He has held product development positions with Analog Devices, where he designed high-performance data converters, and Motorola where he designed analog and RF integrated circuits for cellular transceivers. From 2002 to 2004, he was with the Communications Circuit Lab, Intel where he developed multi-antenna receivers, high-efficiency power amplifiers and high-speed data converters high data-rate wireless transceivers. His research broadly addresses design and technological challenges related to RF and mixed-signal integrated circuits and systems for emerging applications.
Host: Hosted by Prof. Hossein Hashemi, Prof. Mike Chen, and Prof. Mahta Moghaddam. Organized and hosted by SungWon Chung.
Location: Hughes Aircraft Electrical Engineering Center (EEB) - 132
Audiences: Everyone Is Invited
Contact: Elise Herrera-Green
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. -
Computer Engineering Seminar
Mon, Dec 14, 2015 @ 10:30 AM - 11:30 AM
Ming Hsieh Department of Electrical and Computer Engineering
Conferences, Lectures, & Seminars
Speaker: Dr. David Garrett, Broadcom
Talk Title: Transmit Beamforming in WiFi (IEEE 802.11ac)
Abstract: This talk will provide an overview of Transmit Beamforming (TxBF) in the WiFi IEEE 802.11ac standard along with the potential gains with Multi-user MIMO configurations. The talk will dive into the frame structures, messages and computations required to close the TxBF link. The second part of the talk will focus on the role of High-level synthesis (HLS) in order to scale and build TxBF HW solutions over a wide range of antenna configurations (i.e. 1x1, 2x2, 3x3 and 4x4) and multiple generation of parts.
Biography: David Garrett is an Associate Technical Director in the Office of the CTO at Broadcom. He has been recognized as a Distinguished Engineer within the company, and serves on the Broadcom Foundation University STEM Committee. David began his career at Broadcom in 2007 and has worked with many different business units within Broadcom to deliver high performance, low-power digital signal processing (DSP) cores. He was a part of Beceem Communications, a wireless startup developing 802.16e WiMax chipsets. Prior to Beceem, he was with Lucent's Bell Labs Research Wireless Research Laboratory, as an expert in both forward error correction technology as well as Multiple-input Multiple Output (MIMO) wireless signal processing. He serves as a technical expert on Broadcom's internal patent review committee, and is on the organizing committee for the International Symposium on Low Power Electronics and Design (ISLPED) as the TPC Co-chair. He has 40 patents, 21 conference and journal papers, and has co-authored a book chapter on MIMO receiver design. David received a B.S. and Ph.D. in Electrical Engineering from the University of Virginia, and an M.S. from the University of Vermont.
Host: Prof. Massoud Pedram
Location: Hughes Aircraft Electrical Engineering Center (EEB) - 248
Audiences: Everyone Is Invited
Contact: Annie Yu
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.
