Track 1: Telecommunications:
Abstracts and Biographies
Track 1, Session 1: 8:30-9:30am
Directional Frequency
Reuse for Cellular Communications
by
Dr. Saleh Faruque, Northern
Telecom
Abstract: This paper presents a method of directional
frequency reuse for high density, high capacity cellular networks. Unlike
the classical method of cluster reuse, the proposed directional frequency
reuse is based on group reuse, having multiple reuse distances. Consequently,
the carrier to interference ratio (C/I) appears as a function of multiple
reuse distances with fewer cochannel interferers. Moreover, antenna downtilt
and beamwidth becomes more effective thus enhancing C/I and capacity.
Biography: Saleh Faruque has received B.Sc. in Physics
and M.Sc. in Applied Physics from Dhaka University, Dhaka, Bangladesh in
1969 and 1970 respectively. He received M.A.Sc. and Ph.D degrees, both
in Electrical Engineering, from the University of Waterloo, Waterloo, Ontario,
Canada in 1976 and 1980 respectively. Dr. Faruque has been with Northern
Telecom, Brampton, Ontario, Canada, where he contributed extensively in
the area of wireless communication systems and actively participated in
the deployment of Northern Telecom's Cellular products in the Canadian
market place. Later in mid 1994 he moved to the United States, Richardson,
Texas . At present, he is a manager of radio architecture planning. Dr.
Faruque is the recipient of NORTEL's 1997 President's award of excellence
for innovation. He is the author of the Book: "Cellular Mobile systems
engineering", Artech House Inc., Boston, 1997. He has received one
U.S patent and over ten U.S & International patents pending. He has
published over 50 technical articles in IEEE & IEE Journals and Conference
Proceedings.
Return to TechCon Schedule
Track
1, Session 2: 9:45-10:45am
Comparison of W-CDMA
and DSSS-TDMA Systems
by
Donald L. Schilling,
Ph.D., Chairman of the Board,
Golden Bridge Technology
Inc., NJ.
Abstract: W-CDMA is a preferential CAI since it provides
significant immunity to multpath fading. However, in a multpath access
mode, the capacity of a CDMA system is limited by the lack of orthogonality
of the received transmissions from the users terminals and the resulting
near-far problem. TDMA is a time-orthogonal system, which, when spread,
provides both orthogonality, as well as, immunity to multipath. This paper
compares a wireless system employing W-CDMA transmissions from terminal-to-base
and from base-to-terminal, with a novel system which employs spread-TDMA
transmission from terminal-to-base and W-CDMA transmission from base-to-terminal,
thereby providing optimum performance in both directions.
The systems are compared on the basis of capacity in a multipath, multiple
cell, environment and on the basis of complexity. The spread spectrum receivers
employed in both systems employ matched filters which permit connectionless
as well as connection based packet switched communications.
Biography: Donald L. Schilling, Ph.D. is Chairman of the
Board of Directors with Golden Bridge Technology, Inc. Dr. Schilling
was formerly Vice Chairman of the Board, Chief Executive Officer and President
of InterDigital Communications Corporation where he invented and led the
development of Broadband-CDMA, and began the field of PCS in the U.S.A.
Wideband-CDMA, currently being developed by Dr. Schilling, is being proposed
for standardization in the TIA.
Dr. Schilling is Professor Emeritus of Electrical Engineering at the
City College of New York. Dr. Schilling retired in May 1992 as the Herbert
G. Kayser Distinguished Professor of Electrical Engineering at the City
College of the City University of New York. Prior to moving to CCNY, he
was a Professor at the Polytechnic Institute of New York.
Dr. Schilling is an internationally known expert in the field of communications
systems., He has made many notable contributions in spread spectrum communications
systems, FM and phase-locked systems, meteor burs= t communications systems
and HF systems. His design of an adaptive delta modulator is used on the
Space Shuttle.
Dr. Schilling was President of the IEEE Communications Society from
1980-1981, and a member of the Board of Directors of the IEEE from 1982-1983.
He was Editor of the Transactions on Communications, Director of Publication
from 1968-1978, and initiated the Comsoc Magazine and JSAC. During his
term as President, he also initiated the MILCOM and INFOCOM conferences.
He is a Fellow of the IEEE and a member of Sigma Xi. He has co-authored
twelve textbooks, more than 200 papers and has 40 patents, granted and
pending, in telecommunications and electronics.
Return to TechCon Schedule
Track
1, Session 3: 11:00-12:00pm
CDMA Reverse Link Signal Detection
and Demodulation
by
Jon St. Clair, Motorola
Abstract: This talk presents a practical treatment of
the methods, trade-offs, and design of a CDMA PCS direct sequence spread
spectrum signal receiver. The talk includes a walk-through of how a narrow
band signal is recovered from a wideband signal, the Hadamard transform
process, the multi-channel rake receiver, and how the deinterleaving and
decoding blocks all work and play together to provide clear reception of
a faded subscriber signal.
Biography: Jon St. Clair has worked with wireless communications
for the last 16 years with Motorola in Fort Worth. The last seven years
have been spent working on the design of Cellular and PCS products in the
infrastructure branch of the larger Cellular Networks and Space Sector
of Motorola, where he is currently a Senior Staff Engineer.
Return to TechCon Schedule
Track 1, Session 4: 1:30-2:30pm
Short-Term Fading
in Mobile Communications: Characterization & Mitigation Techniques
by
Dr. Ali R. Shah, Ericsson
Inc.
Abstract: In this talk, short-term fading problems in
mobile communications are characterized and mitigation techniques are presented.
The effect of multipath, delay spread, coherence bandwidth, Doppler shift,
Doppler spread, and coherence time are presented and discussed. The different
types of short-term fading: flat & frequency selective fading, and
slow & fast fading are also presented. The mitigation techniques to
combat fading are then discussed, including time diversity (equalization),
multipath (rake), and space (antennas).
Biography: Dr Ali R. Shah is currently working for Ericsson
Inc., Wireless Engineering Technologies, Ericsson Radio Systems since July
1996. In this capacity he has been involved in publishing and patenting
ideas related to wireless communications. He obtained his doctoral degree
from the School of Information Technology, George Mason University, Fairfax,
VA in 1996. He received his Master's degree from the Department of Electrical
and Computer Engineering, George Mason University, Fairfax, Virginia in
1992. Before that he worked as an ICSC-World Labs Fellow at the National
Institute of Nuclear Physics, Rome, Italy on the "Large Volume Detector"
1989-90. He graduated with his bachelor's from the Department of Electrical
and Computer Engineering, NED University of Engineering and Technology,
Karachi, Pakistan in 1989.
Dr Ali R. Shah has been the recipient of a graduate fellowship, from the
Graduate School, George Mason University, Fairfax VA. In 1989 he received
a World Labs Fellowship to work as a research fellow at the National Institute
of Nuclear Physics, Frascati, Italy. He is a position-holder in his undergraduate
engineering class at NED University of Engineering and Technology. In 1982,
he secured a Karachi Merit Scholarship from the Karachi Board of Intermediate
Education.
Dr Shah has also taught as a guest lecturer at the University of Texas
at Dallas. His areas of interest range from self-adaptive equalization
to coverage verification and analysis in cellular systems. He has several
publications in the field of wireless communications and is in the process
of applying for patents in this area.
Return to TechCon Schedule
Track
1, Session 5: 2:45-3:45am
Design of WDM Optical
Transport Networks
by
Francesco Masetti, PhD,
Alcatel Corporate Research Center
Abstract: Optical communications will enable radical
changes within future transport networks. This presentation examines the
main options and issues towards the design and implementation of telecommunication
optical core networks based on multi-wavelength transmission and routing.
After a short introduction, addressing essentially the context for the
adoption of optical techniques to implement routing functions, the node
functional requirements (different optical cross-connects and add-drop
multiplexers) are then illustrated, and this introduces also the relationships
between the node and network functional architectures, which affect the
design phase and the management techniques. This design must ensure proper
allocation of resources and network survivability, together with engineering
rules to ensure physical feasibility. Finally some technological and experimental
results are given as examples to show feasibility of the concepts.
Biography: Francesco Masetti received a M.S. degree in
Electronic Engineering, a postgraduation Master in Information Technology
and a Ph. D. in Computer Science. He is currently the Location Director
of the Alcatel Corporate Research Center in Richardson, TX. He has authored/co-authored
several articles in refereed journals and conferences and is a member of
the IEEE.
Return to TechCon Schedule
Track
1, Session 6: 4:00-5:00am
Multimedia Communications Over Low
Rate Wireless Channels
by
Dr. Jerry D. Gibson,
SMU
Abstract: As the basic telecommunications paradigm shifts
from one centered onseparate voice and data networks to a focus on developing
ubiquitousmultimedia communications, we are faced with the challenge of
providingexceptional quality of service (QoS) and seamless user connectivity
over avast array of heterogeneous networks. Low rate wireless communicationsoffers
some of the greatest difficulties because of the unreliable natureof the
transmission medium, the need to conserve battery power, and therestricted
bandwidth available. We first examine the issues in thetransmission of
voice signals over mobile connections at 8 kbits/s andbelow, with particular
emphasis on the speech coder design, unequal errorprotection, and the effects
of background impairments. We then address theproblem of wireless video
transmission at 28.8 kbits/s, exploring a newmultiframe block motion compensation
technique. Audio and videodemonstrations will be presented.
Biography: Jerry D. Gibson currently serves as Chairman
of the Department of Electrical Engineering at Southern Methodist University
in Dallas, Texas. He has held positions at General Dynamics-Fort Worth,
the University of Notre Dame, the University of Nebraska-Lincoln, and Texas
A&M University. He served as President of the IEEE Information Theory
Society in 1996. Dr. Gibson is Editor-in-Chief of The Mobile Communications
Handbook ( 1995) and of The Communications Handbook (1997). In 1990, Dr.
Gibson received The Fredrick Emmons Terman Award from The American Society
for Engineering Education, and in 1992, was elected Fellow of the IEEE
for contributions to the theory and practice of adaptive prediction and
speech waveform coding. He was co-recipient of the 1993 IEEE Signal Processing
Society Senior Paper Award for the Speech Processing area. His research
interests include data, speech, image, and video compression, multimedia
over networks, wireless communications, information theory, and digital
signal processing.
Return to TechCon Schedule