Knowledge Base

Title Authors Last Update Category
Simulating Gaussian Crosstalk for DSL Testing Timothy R. Clark

The presence of crosstalk is a major detriment to the performance of Digital Subscriber Line (DSL) transceivers. It is therefore important to test performance under a wide variety of crosstalk scenarios. This thesis presents the development of a crosstalk noise generation system as a tool for DSL performance testing. Where many commercially available solutions are limited to specific testing needs, the system presented here is universal and can simulate virtually any noise scenario conceivable for DSL deployment.
Several requirements for the accurate frequency domain modeling of DSL crosstalk are presented. The time domain properties of crosstalk were also studied with particular attention paid to the amplitude distribution. The importance of a Gaussian amplitude distribution and the limiting effect of a finite-length pseudo-random crosstalk sequence on the "tail" of the Gaussian distribution were investigated. A method of forcing finite-length crosstalk sequences to have a "near-Gaussian" amplitude distribution is proposed.

June 27, 2012 Theses
Understanding Digital Subscriber Line Technology Thomas Starr, John M. Cioffi, Peter J. Silverman

From the back cover: "The basic infrastructure for the global broadband network of the future is already in place in most homes and offices. Ordinary telephone lines can provide low-cost, high volume access to the exploding world of telecommunications services that users increasingly rely on. Now, leading experts in the field hve come together to share their insights in a single volume, explaining the past, present, and future of all the DSL technologies."

June 26, 2012 Recommended Textbooks
Advanced Digital Signal Processing and Noise Reduction Saeed V. Vaseghi

From the back cover: "Signal processing and noise reduction are at the core of telecommunications and information processing systems. With the increasing use of digital cellular mobile systems in a variety of adverse environments, noise reduction is becoming a particularly important aspect of communication system design. This second edition provides a thoroughly revised and expanded introduction to the fundamentals of random processes, Bayesian modelling, and noise reduction. The subject is covered in a graphical and mathematically accessible manner with the emphasis on Bayesian inference and its application to noise reduction."

June 26, 2012 Recommended Textbooks
Broadband Forum Kieffer Quitayen

Broadband Forum is an international industry consortium of nearly 200 leading service providers, equipment manufacturers and other interested parties, focused on developing the full potential of broadband DSL to meet the needs of the mass market.

June 26, 2012 External Links
Voice over DSL (An Overview) Deirdre Dinan, Mike Littlefield (UNH-IOL)

This presentation provides an overview and introduction to Voice over DSL (VoDSL) technologies. The presentation covers the basics of channels voice over DSL, Voice over ATM (VoATM) and Voice over IP (VoIP). The presentation also includes a quick introduction to BLES, which is used to transport voice of AAL2 over ATM.

June 26, 2012 Tutorials
Fundamentals of DSL Technology Philip Golden, Herve Dedieu, Krista S. Jacobsen

From back of book: "Fundamentals of DSL Technology... combines the strengths of the field's most renowned DSL experts, providing a foundation of all aspects of DSL system design."

June 26, 2012 Recommended Textbooks
PPP Design, Implementation, and Debugging, Second Edition James Carlson

From the back cover: "PPP Design, Implementation, and Debugging, Second Edition, is a complete and convenient resrouce for netowrk system designers and administrators. This book contains everything you need to know to work with the Point-to-Point Protocol (PPP), one of the most important Internet protocols in use today. Inside you'll find clear explanations of the underlying concepts, practical implementation information, and valuable debugging techniques to keep your PPP connections running smoothly, efficiently, and uninterrupted."

June 26, 2012 Recommended Textbooks
DSL: Simulation Techniques and Standards Development for Digital Subscriber Line Systems Dr. Walter Y. Chen

From the back cover: "Digital Subscriber Line technology heralds the age of digital communication, providing a faster, more efficient method of transmitting data over regular telephone lines. The widespread adoption of DSL technology increases the demand for subject-specific, in-depth knowledge of this breakthrough in digital communication. DSL: Simulation Techniques and Standards Development for Digital Subscriber Line Systems arms the communications and networking engineer with the quintessential information for implementing DSL systems . . . "

June 26, 2012 Recommended Textbooks
ITU-T G.994.1 (G.hs) Handshake Procedures for DSL Transceivers Lincoln Lavoie (UNH-IOL)

This presentation provides an overview the ITU-T G.994.1 (G.hs) Handshaking Procedures for Digital Subscriber Line Transceivers standard. The overview covers the physical layer modulation (DPSK), frame structures, message structures, and parameter encoding. The presentation also includes examples of the differential encoding used for the modulation, and the delimiting bits used within the parameter tree.

June 26, 2012 Tutorials
Digital Communications John G. Proakis

From the preface: "The third edition of Digital Communications has undergone a major reorganization. Compared with with the second edition, which had eight chapters, the third edition contains fifteen. Chapter 1 (Introduction) and Chapter 15 (Multiuser Communications) are new. Other new material that has been added includes a treatment of run-length-limited codes, Nakagami fading statistics, trellis codeing for fading channels, multicarrier modulation, and an expanded treatment of blind equalization. Since this is an introductory-level text, the treatment fo these topics is limited in scope. Some topics that were in the second edition have been deleted, including echo cancellation and suppression of narrowband interference in spread spectrum signals."

June 26, 2012 Recommended Textbooks