xDSL BROADBAND INTERACTIVE
COMMUNICATIONS via POTS
This Short Course on advanced digital subscriber loop (xDSL) communications over the twisted-pair copper infrastructure existing in the plain old telephone system (POTS) requires no prior knowledge of the subject. Course completion provides overall perspective of and detailed introduction to circuit design and system specification of xDSL modems including architecture, technology, and analog/digital circuit tradeoffs in high-speed digital subscriber loop (HDSL), asymmetric digital subscriber loop (ADSL), and very high-speed digital subscriber line (VDSL) systems.
For Registration, please use the ISSCC98 Registration Form on the Advance Program Centerfold. Sign-in is at San Francisco Marriott Hotel, Level B-2, from 6:00PM to 9:00PM on Monday, Feb. 2, for Short Course Attendees only and from 7:00AM to 11:00AM on Tuesday, Feb. 3, for Short Course and Tutorial Attendees only.
The Short Course will be offered three times on Tuesday, February 3.
- The first session is scheduled for 8:00AM to 4:30PM.
- The second session is scheduled for 10:00AM to 6:30PM.
- The third session is scheduled for 1:30PM to 9:30PM.
OUTLINE
HIGH-SPEED DATA ON THE SUBSCRIBER LOOP: xDSL
(8:00A-9:30A), (10:00A-11:30A), (1:30P-3:00P)
The useable bandwidth of an unshielded (and unloaded) twisted pair and the data rates achievable thereon are functions of its length: ranging from about 500kHz and 160kb/s at 18,000ft to 15MHz and 52Mb/s at 1000ft. This introductory lecture describes the medium and its unique impairments, and methods of overcoming those impairments used in a succession of DSL systems (x = H, A, S, and V).
Instructor: John Bingham, Amati Communications Corp., San Jose, CA, received a BS. from Imperial College, London, and an MSEE from Stanford. His primary interest is in data transmission - on the switched telephone network, cellular radio, and the local subscriber loop. He is the author of twenty papers and a book on modem design, the editor of both ANSI and ITU standards for ADSL, and an IEEE Fellow.
PASSBAND HDSL AND ADSL CIRCUITS AND SYSTEMS
(10:00A-11:30A), (12:00P-1:30P), (3:30P-5:00P)
A passband scheme, known as CAP or baseband QAM, has been used successfully in both HDSL and ADSL applications. This signalling scheme is particularly well suited to wired xDSL systems due to the passband nature of the channel. This lecture discusses the basics of CAP and QAM signalling and circuit design challenges and solutions when applying such signalling to HDSL and ADSL applications.
Instructor: David A. Johns is an Associate Professor at the Univ. of Toronto. His interests include analog circuits, oversampling, and high-speed digital communications. He has consulted in the area of high-speed digital communication circuits for companies such as Lucent and presented industrial short courses. He has published a 40 papers, one textbook on analog circuit design, and is an Associate Editor for the IEEE Transactions on Circuits and Systems.
DMT ADSL CIRCUITS AND SYSTEMS
(1:00P-2:30P), (3:00P-4:30P), (5:30P-7:00P)
Circuits and technology requirements for the integration of FDM or EC DMT ADSL systems are presented first, with an emphasis on the analog parts. Possible implementations for AD, DA, continuous-time filters and drivers are discussed. Different DSP architectures are compared. Finally, chipset migration routes are proposed.
Instructor: Damien Macq, Alcatel Mietec, Belgium, received the Eng. degree from Catholic University Louvain, Louvain-La-Neuve, Belgium, 1989 and the PhD in 1994. In 1993, he joined the Hardware Design Center of Alcatel-Bell, Antwerp, Belgium, as analog designer and then as system engineer for analog and mixed telecommunication circuits (GSM, ADSL, VDSL). In 1996, he joined the design group of Alcatel Mietec. He is today xDSL ASSP manager, working on ADSL and HDSL ASSPs.
VERY HIGH-SPEED DIGITAL SUBSCRIBER LINES
(3:00P-4:30P),(5:00P-6:30P),(8:00P-9:30P)
Very high-speed digital subscriber lines (VDSL) are described. Fiber-to-the-node architecture of asymmetric and symmetric full-service access networks and the LAN-extension architecture of symmetric service are described. System requirements for evolving VDSL standards in the ANSI and the European Telecommunications Standards Institute are reviewed. The transmission environment, challenges for VDSL and viable solutions are described. Present VDSL working solutions are presented.
Instructor: John Cioffi, Associate Professor, Stanford University, received the BSEE from Illinois in 1978 and PhD from Stanford in 1984. He was with Bell Labs from 1978-1984, IBM from 1984-1986 and Stanford since 1986. He founded Amati Communications Corp., in 1991, served as an officer and director since 1991, and is now Chief Technical Officer. His interests are in digital transmission and storage. He has over 100 publications and 20 patents. He received the 1991 IEEE Communications Magazine Best Paper and the ANSI 1995 T1 Outstanding Achievement awards. An NSF Presidential Investigator from 1987-1992, he is an IEEE Fellow.
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