RWS 2009
Workshop
WS TH3
Title: MIMO Circuits and Systems: Recent Developments and Future Outlook
Time: Thursday, January 22, 2008, 1:00-5:30 pm
Place: Gas Lamp
Organizer: Prof. Jeyanandh Paramesh, Carnegie Mellon University
Speakers:
- Dr. Minnie Ho, Intel: MIMO for 4G+ cellular systems
- Arya Behzad, Broadcom: Radio Design For Multi-Antenna Systems
- Dr. Harish Krishnaswamy, Columbia University: Millimeter-wave Multiple-Antenna Systems: New Architectures for Silicon
- Dr. Sumeet Sandhu, Intel: Evolution of Wireless Rates and Technologies
Overall Abstract:
The exploitation of the spatial dimension through the use of antenna arrays has underpinned the development of a new generation of wireless communication systems with higher data rates, network capacity and link robustness and range. Multi-antenna (or MIMO) systems also play a key role in the development of new consumer applications based on radar and imaging techniques. Compared to single-antenna systems, multi-antenna systems pose new challenges at the circuit, communication and the network levels. This workshop discusses these challenges, recent developments and future prospects at each of these levels. Topics include the application of MIMO to cellular systems, CMOS IC chipset design issues, the design of silicon IC’s for MIMO at millimeter-wave frequencies, and a discussion of the long-term prospects for MIMO as a disruptive technology for future wireless networks.
MIMO for 4G+ cellular systems
Dr. Minnie Ho, Intel
Abstract: OFDMA and MIMO are mandatory technologies for the next generation of cellular systems. In particular, advances in diversity and spatial multiplexing techniques with and without channel knowledge for both single-user and multi-user MIMO have enabled increases in average and cell-edge spectral efficiencies. Multi-cell MIMO techniques where base-stations exchange information are also gaining interest for their ability to mitigate interference. In this talk, we describe some of the latest MIMO techniques that have been debated and adopted in recent cellular standards, and we describe the impact of these techniques from a performance and complexity standard.
Bio: Minnie Ho is a Principal Engineer at Intel Corporation, where she has developed wireless technologies for UWB, 802.11n, WiMAX, and LTE since 2001. She is the lead architect for cellular research within Intel Labs, and she has led several MIMO ad-hoc groups for the development of WiMAX (802.16e/m) standards. Prior to this, she worked at several start-up companies in Silicon Valley, two of which resulted in successful acquisitions. She received her Ph.D. from Stanford University, and her B.S.E.E. at Princeton.
Radio Design For Multi-Antenna Systems
Arya Behzad, Broadcom
Abstract: Essential to the overall design of a multi-antenna system, is the radio design. This session will provide a brief introduction to the history of multiple antenna systems and the conventional analog-based techniques such as MRC. A general introduction to the 802.11n will then follow, which includes the channelization and modulation types, the definition and the description of the concepts behind the multiple spatial streams (MxN), and additional PHY and MAC techniques allowing for higher rates and/or longer reach. The requirements of 802.11n standard such as sensitivity and EVM and their relation to analog impairments such as phase noise, quadrature imbalances, linearity, and cross-talk will also be discussed. Some specific circuit examples will be presented and some unique circuit implementation challenges of multiantenna radios will be discussed. Some measured performance numbers (range and throughput) will be also presented. The course will wrap up by discussing the future trends of multi-antenna radio implementation.
Bio: Arya Behzad has worked in various senior circuit and system design capacities at various companies. He joined Broadcom in 1998 working on the first generations of CMOS cable-TV tuners and gigabit Ethernet transceivers. With over 70 patents issued, he is currently the number one Broadcom patent holder, and one of few “Broadcom Distinguished Engineers”. He is currently a Director of Engineering working on radios for current and future generation wireless products, and Product Line Manager for all Wireless LAN Radio products. Recently, he drove the team that developed the world’s first standards-compliant 802.11n radio and Broadcom’s first 65nm WiFi radios, the WLAN radio in the world’s first WLAN/BT/FM combo SoC, as well as the world’s first single chip 802.11n SoC (in 65nm technology). He has published numerous technical papers in refereed journals and conferences and authored a book, Wireless LAN Radios: From System Definition to Transistor Design, IEEE Press/Wiley which was published in December of 2007. He has taught courses and presented technical seminars at various conferences and at several universities, including UC Berkeley, UCLA, UCSD and Cal Tech. He is on his seventh year serving as a member of the Technical Committee of the International Solid State Circuits Conference. He is also on his fourth year as an Associate Editor of the Journal of Solid State Circuits and has served as the Guest Editor of the Journal in the past.
Millimeter-wave Multi-Antenna Systems
Dr. Harish Krishnaswamy, Columbia University
Abstract: Multiple-antenna systems, such as phased arrays, have been ubiquitous in highperformance military applications for over 50 years. Over the last 5 years, the integration of multiple-antenna systems onto silicon-based processes has aroused significant interest. The impetus has been provided by the emergence of several millimeter-wave commercial applications, such as high-data-rate 60GHz wireless personal-area networks (WPANs) and 22-29GHz and 77GHz vehicular radar. The first half of this talk will present several system-level design considerations and briefly review the state of the art. The second half will focus on new multiple-antenna architectures that harness the advantages of silicon-based processes, specifically CMOS, to increase functionality and reduce area and power consumption.
Evolution of Wireless Rates and Technologies
Dr. Sumeet Sandhu, Intel
Abstract: Historical data over 15+ years shows that communication data rates are driven by Moore's law - the faster that bits are processed, the faster they must be pushed on/off-chip. Projecting out 10-20 years, wireless must deliver terabits/second over the air - reliably, cheaply, at long distances. Bandwidths to sustain such high data rates are found at very high carrier frequencies of GHz, THz, eventually optical! Optical wireless poses many new challenges including: miniature antennas/lasers at optical frequencies, massive matrix computations for large MIMO arrays, protocols for 'laser beam' links, rethinking infrastructure with ubiquitous repeaters, and cognitive opportunistic harvesting of large chunks of spectrum. This is a dramatic paradigm shift with huge opportunities and technical challenges, and now is the right time to reinvent communication.
Bio: Sumeet Sandhu currently serves as Technical Assistant to the Vice President of Intel Research in the Corporate Technology Group at Intel Corporation. Previously, she managed the wireless 'Distributed Communication' research project on multi-hop/cooperative relays, network coding, wideband MIMO and cellular scaling, which made significant impact on WiMax standards and the research community with novel cross-layer PHY/MAC research. Sumeet was a key contributor to the IP portfolio on MIMO-OFDM, inventing the space-frequency bit interleaver in the IEEE 802.11n standard. She has published over 20 papers, holds over 5 patents and has filed over 30 patent applications. She holds a PhD from Stanford University and a BS and
MS from the Massachusetts Institute of Technology, all in Electrical Engineering. She held positions at Iospan Wireless, Sprint Corporation, Hughes Research Laboratories and AT&T Bell Laboratories prior to Intel.
See also Multiple-Input Multiple-Output Wireless Systems: Signaling, Design, and Fundamental Limits short course in the morning.
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