The IEEE Semiannual Vehicular Technology Conference
Connecting The Mobile World

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VTC Spring 2002
Connecting the Mobile World
Birmingham, Al
Sheraton Birmingham Hotel
May 6 - 9, 2002

IEEE VTC Spring 2002 Tutorials

Birmingham, AL, May 6, 2002
  1. Multiuser Detection and Decoding in CDMA (full-day)
  2. Wireless IP over 3G and beyond Mobile Networks(full-day)
  3. Smart antennas and MIMO systems (full-day)
  4. Joint Physical and Network Layer Optimisation of Wireless Systems (full-day)
  5. WCDMA for UMTS (full day)
  6. Modelling and analysis of wireless communications systems (full-day)
  7. Mobile Ad hoc Networks (half-day)
  8. Core Enabling Technologies For The Mobile Internet: Systems With Global And Limited Mobility (half-day)
  9. UWB Radio Technology in Wireless PANs (half-day)
  10. Orthogonal Frequency Division Multiplexing for Wireless Communications (half-day)

Tutorial 1: Multiuser Detection and Decoding in CDMA

Lars K. Rasmussen

Over the past decade, much work has been done in the area of multiuser detection (MUD). These efforts have now led to a more thorough understanding of the principles at play and thus to a structured framework for design and analysis. Within the past few years, joint decoding of coded CDMA has also matured and there is now a firm understanding of iterative decoding techniques based on turbo principles. This tutorial is intended to provide an overview of the fundamental theory and current understanding of joint multiuser detection and decoding in CDMA.

Basic discrete-time models for CDMA is developed and used as the foundation for presenting the variety of MUD strategies. The presentation of the detection techniques is based on maximum-likelihood and MMSE optimality criteria where we will go into details of constrained and unconstrained detection. These detector structures constitute the theoretical foundation for multiuser detection upon which iterative strategies can be applied for efficient implementation. Interference cancellation can thus be seen as an iterative implementation of theoretically well-founded structures. Linear detection strategies, in turn, have proven very effective in an iterative decoding structure for coded CDMA. Such structures are discussed in some detail and they clearly represent the future of multiuser technologies.

The tutorial will focus on the optimal ML detector, linear detectors, trellis-search detectors and especially on iterative interference cancellation strategies as they are particularly interesting for practical implementation. This provides a broad foundation within the area upon which a detailed discussion of iterative joint decoding strategies for coded CDMA is based. Joint decoding of coded CDMA is discussed in some detail and especially iterative joint decoding based on turbo principles and linear MUD strategies are considered.


  1. Development of basic concepts and models
    • Discrete-time models
    • Conventional detection
    • Philosophy behind multiuser detection
  2. One-shot detection
    • Conventional detection
    • Optimal (0,1)-constrained ML detection
    • Linear detection
    • Limited trellis search detection
    • Relaxation and heuristic methods
  3. Iterative detection (multistage interference cancellation)
    • Concepts of interference cancellation
    • Interference cancellation structures
    • Linear interference cancellation
    • Weighted linear interference cancellation
    • Non-linear interference cancellation
  4. Iterative joint decoding of coded CDMA
    • Interference cancellation
    • Iterative MMSE filtering
    • Recursive Bayesian filtering

Intended Audience

This tutorial is intended for R & D engineers, academics and graduate students with an interest in detection and decoding strategies for CDMA. The tutorial will provide an overview of detection strategies and therefore only a general understanding of digital communications and linear algebra is required.


Lars K. Rasmussen was born on March 8, 1965 in Copenhagen, Denmark. He got his M.Eng. degree in 1989 from the Technical University of Denmark, and his Ph.D. degree from Georgia Institute of Technology (Atlanta, Georgia, USA) in 1993. From 1993 to 1995, he was at the Mobile Communication Research Centre, University of South Australia as a Research Fellow. From 1995 to 1998 he was with the Centre for Wireless Communications at the National University of Singapore as a Senior Member of Technical Staff. He then spent 3 months at the University of Pretoria, South Africa as a Visiting Research Fellow before spending 3 years in the Department of Computer Engineering at Chalmers University of Technology in Gothenburg, Sweden from 1999 to 2002 as an Associate Professor. Since February 2002, he has been at the Institute for Telecommunications Research, University of South Australia, Adelaide, Australia as professor of telecommunications and head of the Systems and Multiple Access group.


Tutorial 2: Wireless IP over 3G and beyond Mobile Networks

Abbas Jamalipour, University of Sydney, Australia

This tutorial discusses implementation of wireless Internet over next generation cellular systems and explains technical implications toward an Internet access evolution from fixed into mobile environment. Internet-based applications are the emerging source of traffic in future wireless networks and broadband wireless networks should consider the Internet as the primary service. The tutorial explains current and future mobile and wireless Internet technologies, and directs up-to-date trends of the two leading technologies; i.e. Internet and cellular, into next generation wireless networks such as UMTS, wideband CDMA, and beyond. The tutorial gives audiences all knowledge they need to start and/or continue research and development projects and to plan for wired and wireless networking.

The tutorial also provides audiences with the state-of-the art information on the third generation wireless networks and beyond including trends in new era of wireless telecommunications, standardization activities, global network harmonization, and all-IP network. The tutorial will discuss the importance of the traffic management, mobility and location management, protocol enhancement for interworking of heterogeneous wired and wireless networks, and the quality of service in future generations of wireless networks. Concepts of new network architectures for future wireless IP networks will be demonstrated in this tutorial.


Abbas Jamalipour has been with the School of Electrical and Information Engineering at the University of Sydney, Australia, since 1998, where he is responsible for teaching and research in wireless data communication networks and satellite systems. He received his Ph.D. in Electrical Engineering from Nagoya University, Japan, in 1996. His current areas of research include wireless broadband data communications and wireless IP networks, mobile and satellite communications, traffic modeling and congestion control. He is the author of the first technical book on LEO satellites, Artech House 1998. He is a Senior Member of IEEE. He is recipient of a number of technology and paper awards and author for four technical books and many papers in IEEE and IEICE Transactions and Journals as well as in international conferences. He was an organizing committee member for GLOBECOM'98 and is the Secretary to the Satellite and Space Communications Committee of the IEEE ComSoc and a guest editor to two special issues on 4G networks in IEEE magazines. He was a symposium organizer for the IEEE Globecom2001, San Antonio, Texas and is a technical editor to the IEEE Personal Communications Magazine.


Tutorial 3: Smart antennas and MIMO systems

Andreas F. Molisch, AT&T Labs - Research, Middletown, NJ
Juha Laurila, Nokia, Helsinki, Finland
Klaus Hugl, TU Wien, Austria
Ernst Bonek, TU Wien, Austria

Smart antennas are one of the most promising methods for increasing capacity of mobile radio systems, both for upgrading second-generation systems and for use in third- and fourth generation systems. The tutorial will give a comprehensive overview over all relevant aspects of smart antenna systems. Measurement and modeling of the spatial propagation characteristics, which form the physical basis for any smart antenna system are discussed as well as signal processing algorithms, hardware architectures, experiences from the construction of an actual testbed, and capacity issues. Also MIMO systems (multiple antennas at base station and mobile station), the most recent, exciting development in smart antennas, are discussed.


Andreas F. Molisch received the Dipl. Ing., Dr. techn, and habilitation degrees from the Technical University Vienna in 1990, 1994, and 1999, respectively. From 1991 to 2001, he was with the Institut für Nachrichtentechnik und Hochfrequenztechnik (INTHFT) of the TU Vienna, most recently as associate professor. Since 2001, he has been with AT&T Laboratories - Research. His current research interests are MIMO systems, smart antennas, characterization of mobile radio channels, and wideband systems. He is senior member of the IEEE, and (co)author of two books, five book chapters, some 50 journal papers, and numerous conference contributions.

Juha Laurila received the M.Sc. (E.E.) degree from the Helsinki University of Technology, Finland in 1995 and Dr.Tech. degree from the Vienna University of Technology, Austria in 2000. Since 2000 he has been working as a senior research engineer at Nokia Research Center (Radio Communications Laboratory) Helsinki, Finland. His current research activities are related to the utilisation of multiple antenna techniques in cellular systems.. J.Laurila has authored or co-authored more than 20 international reviewed journal and conference publications.

Ernst Bonek was born in Vienna, Austria, 1942. He received the Dipl. Ing. And Dr.techn. degrees from the Technische Universität (TU) Wien. In 1984, he was appointed Full Professor of Radio Frequency Engineering at the TU Wien. His present field of interest is mobile communications at large.Recent contributions concern the characterization of mobile radio channels,cordless telephony, and advanced antennas and receiver designs. Altogether, he authored or co-authored some 100 journal publications. He holds three patents, and seven more are pending. His current positions in scientific organizations include: chairman of the "Antennas and Propagation" working group in the European research initiative "COST 273"; Area Editor of "Wireless Personal Communications"; Chairman of URSI (Union of radio scientists) commission, Senior Member of IEEE. Klaus Hugl was born in Austria, in 1974. He received his Dipl. Ing. with highest honors from Technische Universität Wien (TU-Wien) in 1998. He currently works towards his PhD at Institut für Nachrichtentechnik und Hochfrequenztechnik (INTHF) of TU-Wien. His research interests are smart antennas, especially downlink beamforming and spatial channel modeling/characterization.


Tutorial 4: Joint Physical and Network Layer Optimisation of Wireless Systems: Smart Antennas, Turbo Coding, Space-Time Coding, Adaptive Transceivers, Intelligent Networking and 'all that' for Improved QoS

Lajos Hanzo
University of Southampton

This overview is based on the Wiley/IEEE Press monographs ``Blogh, Hanzo: Third-Generation Systems and Intelligent Wireless Networking: Smart Antennas and Adaptive Modulation''; ``L. Hanzo, et al.: Adaptive Wireless Transceivers: Turbo-Coded, Turbo-Equalised and Space-Time Coded TDMA, CDMA and OFDM systems''; ``L. Hanzo, et al.: Turbo Coding, Turbo Equalisation and Space-Time Coding'' (for sample chapters and full contents please refer to The short course provides an insight into the effects of turbo-coded, turbo-equalised and space-time coded adaptive TDMA, CDMA and OFDM transceivers as well as smart antennas and a range of other efficient networking techniques on the achievable teletraffic capacity of wireless systems. This research-oriented presentation considers the joint benefits of both physical and network-layer performance enhancement techniques.

More specifically, conventional systems would drop a call in progress, if the communications quality falls below the target quality of service and it cannot be improved by handing over to another physical channel. By contrast, the adaptive transceivers of the near future are expected to simply 'instantaneously drop the throughput, rather than dropping the call' by reconfiguring themselves in a more robust mode of operation. It is demonstrated that the proposed beam-forming and adaptive transmission techniques may double the expected teletraffic capacity of the system, whilst maintaining the same AVERAGE performance as their conventional fixed-mode counterparts.

Whilst this overview is ambitious in terms of providing a research-oriented outlook, potential attendees require only a modest background in wireless communications. Network operators, service providers, managers and researchers embarking on the joint optimisation of the physical and network layer may find the coverage of the presentation beneficial.


The lecturer of this course is Lajos Hanzo. During his 26-year carreer he has held various academic and research positions in Hungary, Germany and the UK. Since 1986 he has been with the University of Southampton, where he holds the Chair of Telecommunications.


Tutorial 5: Title of the tutorial: "WCDMA for UMTS"

Harri Holma, Nokia Networks, IP Mobility Networks

This tutorial covers the main parts of the WCDMA FDD/3GPP standard, its utilization and its performance. The main focus is on the physical layer standard with a short introduction on the radio access network architecture. The coverage and capacity of the WCDMA air interface is presented with a number of simulation results and with some measurement results. The packet access is covered and the latest development of High Speed Downlink Packet Access (HSDPA) is presented. The integration of GSM/EDGE and WCDMA networks is described.


  1. Introduction to WCDMA
  2. Background and Standardization
  3. Radio Access Network Architecture
  4. Physical Layer
  5. Packet Access Including HSDPA
  6. Capacity and Coverage
  7. Radio Resource Management
  8. Integration with GSM/EDGE


HARRI HOLMA joined Nokia Research Center 1994 and received his M.Sc. from Helsinki University of Technology 1995. Since 1994 he has been working with 3rd generation WCDMA air interface with special interest on radio network performance. In January 1998 he joined Nokia Network and he is currently working as Senior Specialist with EDGE/WCDMA radio network performance area. Mr. Holma has edited the book "WCDMA for UMTS", and has been an author in three chapters in the book "WCDMA for 3rd Generation Mobile Communications" by Ojanperä and Prasad.


Tutorial 6: Modelling and analysis of wireless communications systems

A. Annamalai, The Bradley Dept. of Elect. and Comput. Eng., Virginia Tech.
C. Tellambura, SCSSE/Faculty of Information Technology, Monash University

Demand for user mobility has sparked tremendous growth in wireless personal communication systems. Owing to the growing interest in ubiquitous high­speed wireless communications and testimonies to the rapidly increasing penetration of the wireless technology around the globe, world wide research efforts into the performance of wireless systems have grown rapidly. Therefore, the overall aim of this tutorial is to provide a comprehensive and timely coverage of performance analysis techniques on fading channels. The performance of various mobile and wireless systems has been analyzed by many authors over the last four decades. Recent developments, tailored towards unified analysis of wireless communications systems, have shown exact solutions to some outstanding problems in wireless and digital communications. In this tutorial, we will review both latest developments as well as more classical results. The coverage of this tutorial is quite broad encompassing review of mathematical tools and their applications to performance analysis of diversity systems for all common binary and M­ary signals over generalized fading channels, evaluation of pairwise error probability for coded modulation with and without channel state information, outage analysis for cellular mobile radio, and investigation into low-complexity receiver structures and packet combining strategies.


A. Annamalai (M'94) received his B.Eng. degree with the highest distinction from the University of Science of Malaysia in 1993, and M.A.Sc. and Ph.D. degrees from the University of Victoria in 1997 and 1999, respectively, all in electrical and computer engineering. Currently, he is with the Bradley Department of Electrical and Computer Engineering of Virginia Tech as an Assistant Professor. He was an RF design engineer with Motorola from 1993-1995. Dr. Annamalai's current research interests are in high-speed data transmission over wireless links, adaptive modulation and coding, smart antenna, OFDM and wireless communication theory. Recently, he was awarded the 2001 IEEE Leon K. Kirchmayer Prize Paper Award for his work on diversity systems. He is an Editor for the IEEE Journal on Selected Areas in Communications (Wireless Communications Series), an Associate Editor for the IEEE Communications Letters and is the Technical Program Chair of the IEEE VTC2002 (Fall).

C. Tellambura received his B.Sc. degree with honors from the University of Moratuwa, Sri Lanka, in 1986, M.Sc. in electronics from the King's College, UK, in 1988, and Ph.D. in electrical engineering from the University of Victoria, Canada, in 1993. He was a post-doctoral research fellow with the University of Victoria and the University of Bradford. Currently, he is a Senior Lecturer at Monash University, Australia. He is an Editor for the IEEE Transactions on Communications and the IEEE Journal on Selected Areas in Communications (Wireless Communications Series). His research interests include coding, communications theory, modulation, equalization and wireless communications.


Tutorial 7: Mobile Ad hoc Networks

Elizabeth M. Belding-Royer
and Sung-Ju Lee

Ad hoc networking, while not a new idea, has received a lot of attention in the past few years. As such, numerous new protocols have been developed that are revolutionizing the way this communication works. This tutorial will educate the attendees on the fundamentals of ad hoc networking technology and research, as well as the state of the art in this area. We will begin the tutorial with a description of the characteristics of wireless ad hoc networks that distinguish them from their wired and cellular network counterparts. We will then cover recent unicast and multicast routing approaches in great detail. In addition, we will cover Bluetooth and enabling technologies such as IEEE 802.11. We will conclude with recent implementation and standardization efforts, as well as directions for future research. Attendees will gain an in-depth understanding of ad hoc networking issues, as well as of many of the proposed solutions that are likely to be, or have already been, adopted by industry.


Elizabeth M. Belding-Royer is an Assistant Professor in the Department of Computer Science at the University of California, Santa Barbara. She completed her Ph.D. in Electrical and Computer Engineering at UC Santa Barbara in 2000. Elizabeth's research focuses on mobile networking, specifically routing protocols, security, scalability, address autoconfiguration, and adaptability. Elizabeth is the author of numerous papers related to ad hoc networking, and is an active participant of the IETF working group for Mobile Ad hoc Networks. Elizabeth serves on the technical program committee and organizing committee for various networking related conferences. She is a member of the ACM, ACM SIGMOBILE, IEEE, and IEEE Communications Society. See for further details.

Sung-Ju Lee is a research scientist/engineer at the Internet Systems and Storage Lab (ISSL) of Hewlett-Packard Laboratories. S.-J. received his M.S. and Ph.D. in Computer Science at the University of California, Los Angeles, and B.S. at Hanyang University, Korea. S.-J. published over twenty papers in the field of mobile networking and content delivery networks. He is a co-guest editor of the Wireless Communications and Mobile Computing's special issue on Mobile Ad Hoc Networking, is an area editor on ad hoc networks for ACM SIGMOBILE Mobile Computing and Communications Review (MC2R), and serves as a technical program committee and organizing committee member of various networking related conferences. He is a member of IEEE, IEEE Communications Society, IEEE Computer Society, ACM, ACM SIGCOMM, and ACM SIGMOBILE. His research interests include mobile networking and computing, wireless networks, ad hoc networks, content distribution networks, personal area networks, streaming media, and performance evaluation. See for further details.


Tutorial 8: Core Enabling Technologies For The Mobile Internet: Systems With Global And Limited Mobility

Prof. dr Milica Pejanovic, Faculty of Electrical Engineering, University of Montenegro

The convergence of wireless communications and Internet yields remarkable opportunities for innovations in technology, applications and services. Combination of the pervasive explosions in each of these fields will enable wide-band wireless access to the Internet as well as advanced multimedia services. This tutorial presents the essential elements of the emerging disciplines and builds the framework to understand how the component parts contribute to new system solutions. It is basically achieved through a comprehensive description of Internet delivery over current and near-future wireless networks and different methods of providing Internet services in wireless networks such as GPRS, EDGE, some of the Third Generation Cellular and local area wireless IP. At the beginning, the tutorial covers a review of current mobile/cellular technologies. A summary of digital cellular (second, second plus and third generation) and cordless wireless communication systems is presented emphasizing the role of cellular engineering and radio channel characterization. The next key topic deals with the issue of mobility itself focusing on possible connectivity solutions and the emerging standardized elements of Mobile IP. Adaptation of Internet architecture and web based computing to the limitations and constraints of the mobile radio channel and associated human interface is described through the presented set of Wireless Application Protocol specifications. Thus, WAP concept and features, including protocol elements, are fully explained. Further on, the tutorial mainly addresses current working view of second plus (GPRS, EDGE) cellular technologies as well as the associated data services models seeking to provide integrated multimedia services. Also, functional features and concepts of solutions for local-based mobile computing are given. Thus, adaptation of considered cellular technologies for limited mobility services through wireless LANs (IEEE 802.11, HIPERLAN, Bluetooth) implementation is presented. Relationships and comparisons of all discussed mobile computing and wireless Internet core technologies that fulfill the vision of wireless personal communications together with expected prospects and trends are discussed at the tutorial end.


  1. Overview of wireless networks
    1. Cellular, personal, cordless, LANs, broadband, satellite networks
    2. The cellular concept
      1. Evolution of cellular networks (first, second, second-plus, third, fourth generation)
      2. Frequency reuse, Multiple access, Handoffs, Signaling, Roaming
      3. Radio propagation: multipath fading and mitigation
  2. Features of Internet architecture
    1. Architecture elements
    2. QoS issues
    3. Packet communications and coding techniques
  3. Mobile IP
    1. Concepts and specific issues in the mobile communications
    2. Mobility for IPv6
  4. Wireless Application Protocol (WAP)
    1. Architecture
    2. Wireless Application Environment
    3. Protocol elements
  5. Global-mobility cellular technologies: concepts, features and constraints
    1. GPRS
    2. EDGE
    3. IMT-2000/UMTS
  6. Limited-mobility cellular technologies
    1. IEEE 802.11
    3. Bluetooth
  7. Performance issues, comparisons and discussion


Milica Pejanovic is full professor at the University of Montenegro, Faculty of Electrical Engineering, Podgorica. Mrs. Pejanovic graduated in 1982. at University of Montenegro with BSc degree in Electrical Engineering. She has got MSc and PhD degrees in Telecommunications at University of Belgrade. Prof. Pejanovic has also performed research in mobile communications at University of Birmingham, UK for the period 1984-1985. She has been teaching at University of Montenegro basic telecommunications courses on graduate and postgraduate levels, as well as courses in mobile communications and computer communications and networks, being the author of three books and many strategic studies. At Scuola Superiore di Reiss Romoli (SSGRR) at l'Aquilla (Italy) she is engaged as a lecturer for a course on Mobile Internet. She has published more than 100 scientific papers in international and domestic journals and conference proceedings. She has been a chairman for several conferences and workshops, giving tutorials and presenting invited papers at many technical and scientific conferences (IEEE, VTC, WPMC...). Her main research interests are: radio channel modeling and fading mitigation, wireless networks performance improvement, wireless broadband transmission techniques, optimization of telecommunication development policy. Prof. Pejanovic has considerable industry and operating experiences working as industry consultant (Ericsson, Siemens..) and Telecom Montenegro Chairman of the Board. Being the project leader, she conducted several GSM networks design and implementation projects worldwide. At the moment she is involved in their enhancement and upgrade for the purpose of wide-band data communications. Prof. Pejanovic is leading the Government team of experts working on telecommunications sector restructuring, including the intended Telecom Montenegro privatization, as well as establishment of an appropriate regulation infrastructure. Prof. Pejanovic is IEEE Member and she participates in ITU-D projects concerning telecommunications infrastructure development and Internet promotion as well as in ITU-R Working Group for IMT-2000. Also, being an ITU expert, as a speaker and a lecturer, she is involved in ITU seminars dealing with IMT-2000 issues.


Tutorial 9: UWB Radio Technology in Wireless PANs

Kai Siwiak, Time Domain Corporation, Huntsville, AL

Ultra Wideband (UWB) signaling is a modern wireless technique of transmitting and receiving short baseband signals without an RF carrier. The technique re-uses previously allocated RF bands by spreading the impulse energy thinly in a wide spectrum, thus rendering signals imperceptible in the noise floor of conventional narrow band receivers. The technological basics and performance of several methods of generating and radiating UWB signals, including time position coded impulse UWB, direct sequence coded UWB, and transmitted reference UWB approaches, are examined. Applications and uses of UWB radio technology in wireless PANs are compared with conventional techniques. Short pulse, low power techniques have enabled practical through-the-wall radars, centimeter precision 3-D positioning, and communications capabilities at very high data rates, and with exceptional spatial capacities.


Kazimierz (Kai) Siwiak is Vice President - Strategic Development at Time Domain Corporation, Huntsville, AL, and was a recent recipient of the Dan Noble Fellow Award from Motorola Corporation. He is a Registered Professional Engineer in Florida, Senior Member of the IEEE, and has lectured on Ultra-wideband technology, and antennas and propagation internationally. He received his B.S.E.E. and M.S.E.E. degrees from the Polytechnic Institute of Brooklyn (now Polytechnic University), Brooklyn, NY, and his Ph.D. from Florida Atlantic University, Boca Raton, FL. Dr. Siwiak holds more than 70 patents world-wide, including 31 issued in the US. He has published extensively, including one paper designated "Paper of the Year," by IEEE Vehicular Technology Society. He has authored the text book, Radiowave Propagation and Antennas for Personal Communications, Artech House, now in Second Edition, and has contributed chapters to several other books and encyclopedias. Prior to joining Time Domain, he held positions at Motorola and at Raytheon.


Tutorial 10: Orthogonal Frequency Division Multiplexing for Wireless Communications

Geoffrey Li and Len Cimini, ECE Georgia Tech

Orthogonal frequency division multiplexing (OFDM) has been shown to be an effective technique to combat multipath fading in wireless communications. This approach has been chosen as the standards in several outdoor and indoor high-speed wireless data applications. This tutorial initially presents the basic principles of OFDM. Then we discuss the problems and some of the potential solutions to the practical issues in implementing such a system. These include techniques for peak-to-average power ratio reduction, time and frequency synchronization, channel estimation, adaptive antenna arrays and transmitter diversity. We conclude with a discussion of current and proposed systems.

This tutorial not only gives a general description of OFDM for wireless communications but also introduces the current research results in this area.

Practicing engineers and researchers who are interested in understanding and doing research in OFDM and related topics, particularly those who are engaged in the design of high-speed wireless data systems. OFDM is currently a very hot topic in both the academic and industrial communities and it is anticipated that this tutorial will be very well attended.


Leonard J. Cimini, Jr., (S'77-M'82-SM'89-F'00) was born in Philadelphia, PA. He received the B.S.E. (summa cum laude), M.S.E. and Ph.D. degrees in electrical engineering from the University of Pennsylvania in 1978, 1979, and 1982, respectively. During the graduate work he was supported by a National Science Foundation Fellowship. Since 1982, he has been employed at AT\&T, where his current research interests are in wireless communications systems. Dr. Cimini is a member of Tau Beta Pi and Eta Kappa Nu. He has been very active in the IEEE Communications Society. He served as Editor-in-Chief of the IEEE J-SAC: Wireless Communications Series and is currently serving as a Member At-Large of the Board of Governors of the IEEE Communications Society. He is also an Adjunct Professor at the University of Pennsylvania.

Ye (Geoffrey) Li (S'93-M'95-SM'97) was born in Jiangsu, China. He received his B.S.E. and M.S.E. degrees in 1983 and 1986, respectively, from the Department of Wireless Engineering, Nanjing Institute of Technology, Nanjing, China, and his Ph.D. degree in 1994 from the Department of Electrical Engineering, Auburn University, Alabama. After spending serval years at AT&T Labs - Research, he joined Georgia Tech as an Associate Professor in 2000. His general research interests include statistical signal processing and wireless communications. He served as a guest editor for two special issues on Signal Processing for Wireless Communications for the IEEE J-SAC and is currently serving as an editor for Wireless Communication Theory for the IEEE Transactions on Communications.