NDLI: Multiuser Spectrum Optimization for Discrete Multitone Systems With Asynchronous Crosstalk

Content Provider	IEEE Xplore Digital Library
Author	Chan, V.M.K. Wei Yu
Copyright Year	1991
Abstract	Finding computationally efficient spectrum optimization methods for a multiuser digital subscriber line (DSL) environment is a key objective of dynamic spectrum management for DSL systems. For synchronous discrete multitone (DMT) based DSL systems, the computational complexity issue can be partially addressed using a dual optimization approach that decomposes the problem in the frequency domain. However, the decomposition approach fails whenever the DMT system is asynchronous, in which case the power allocations in adjacent frequency tones interfere with each other. This paper provides a mathematical model for intercarrier interference due to symbol misalignment and proposes ways to modify the dual method for spectrum optimization of asynchronous DSL systems. The main ingredient of the algorithm is an efficient method to evaluate the minimum power required to support a given bit-allocation using a power series approximation, combined with a local gradient search.
Sponsorship	IEEE Signal Processing Society
Starting Page	5425
Ending Page	5435
Page Count	11
File Size	526279
File Format	PDF
ISSN	1053587X
Volume Number	55
Issue Number	11
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2007-11-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Crosstalk DSL Optimization methods Radio spectrum management OFDM modulation Computational complexity Frequency domain analysis Mathematical model Interference Approximation algorithms spectrum balancing Digital subscriber lines dynamic spectrum management intercarrier interference
Content Type	Text
Resource Type	Article
Subject	Signal Processing Electrical and Electronic Engineering

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