Golden P. Fundamentals of DSL Technology

2006г. , 454 стр.
Язык: английский.


Эта книга содержит информацию, полученную из различных достоверных и уважаемых источников и рассказывает об основах технологии DSL.

Overview of the POTS Environment — Signals and Circuits.
How the Telephony System Is Typically Constructed.
Speech Signals.
Hybrid Circuits.
DC Signalling.
Wetting Current.
Ringing.
Ring Trip.
On- or Off-Hook Detection.
Dialing.
Subscriber Private Metering.
Telephony Speech Coding.
Balance about Earth.
Testing.
Overload.
High-Speed Voiceband Modems.
CLASS Signalling.
References.
The Copper Channel—Loop Characteristics and Models.
Historical Use of the Copper Network—Digital vs. Analog .
Physical Characteristics of Copper Lines—The Shielded Twisted Pair.
Electrical Characteristics of Twisted Pairs.
Generic Models of DSL Cables.
Loop Con?guration.
References.
Noise and Noise Modelling on the Twisted.
Crosstalk.
Impulsive Noise.
Noise from Faults.
Engineering Measures.
Modelling.
Mathematical Modelling.
References.
The Twisted Pair Channel—Models and Channel Capacity.
Introduction.
Information in Digital Communication Systems.
Entropy and Information.
Transmission Rate and Channel Capacity .
Channel Capacity in Presence of Additive Gaussian Noise.
Theoretical Rate Computations for PAM, QAM, CAP, and DMT Systems.
Examples of Data Rate Calculations.
References.
Introduction to DSL.
Introduction .
History.
Alteative Broadband Access Technologies.
Overview of DSL Technology.
Representative DSL Transceivers.
Summary.
References.
Fundamentals of Single-Carrier Modulation.
Overview.
Basics of QAM, PAM, and CAP Modulation.
Main Parameters of SCM Signals.
Performance.
Special Techniques Used in SCM Applications.
Annex I: Constellation Diagrams.
References.
Fundamentals of Multi-Carrier Modulation.
Introduction.
Basics of Multi-Carrier Modulation .
Discrete Multi-Tone (DMT).
Initialization.
Steady-State Adaptation.
Summary.
Acknowledgments.
References.
Trellis-Coded Modulation in DSL Systems.
Introduction.
Principles of Trellis-Coded Modulation.
Trellis Coding in SHDSL.
Trellis Coding in ADSL.
Conclusions.
References.
Error Control Coding in DSL Systems.
Introduction.
Background on Error Control Codes.
Forward Error Correction Coding Gain.
Interleaving.
Concatenated Coding.
Summary.
Acknowledgments.
References.
Advanced Coding Techniques for Digital Subscriber Lines.
Introduction.
Background on LDPC-Coding and Turbo-Coding Techniques.
Error-Correction Coding for Digital Subscriber Lines.
Transmitter and Receiver Functions.
Performance.
Complexity.
Summary.
References.
DSL Channel Equalization.
Introduction.
Background Theory.
Equalization Optimization Criteria.
Equalizer Structures.
Closed-Form Equalizer Design.
Adaptive Equalization.
Examples and Practical Design Issues.
References.
Synchronization of DSL Modems.
Overview.
PAM, QAM, and CAP Timing Recovery.
DMT Synchronization.
References.
Radio-Frequency Interference Suppression in DSL.
Introduction.
Suppression Strategies—An Overview.
Analog Suppression Techniques.
Digital Suppression Techniques.
Passive Digital Suppression Techniques.
Active Digital RFI Cancellation.
Alteative Methods to Suppress RFI.
Evaluation of Digital Suppression Methods.
Summary.
References.