NDLI: The optimal power allocation for equal-length twisted-pair channels

Content Provider	IEEE Xplore Digital Library
Author	Jungwon Lee Cioffi, J.M.
Copyright Year	2003
Description	Author affiliation: Dept. of Electr. Eng., Stanford Univ., CA, USA (Jungwon Lee; Cioffi, J.M.)
Abstract	This paper investigates the power allocation for upstream and downstream signals in twisted-pair channels in order to maximize data rate. The channels interfere with each other in two forms: the near-end crosstalk and far-end crosstalk. These interferences can be mitigated by the joint optimization of upstream and downstream power spectral density (PSD). We derive the condition under which a subchannel is shared by both streams of monopolized by only one direction stream. In addition, the optimal power-allocation algorithm based on the greedy approach is developed under the discrete-rate constraint. Numerical results show that the optimal power-allocation achieves substantially more data rate than suboptimal schemes: the equal PSD scheme and frequency division duplexing (FDD) scheme.
Starting Page	2862
Ending Page	2866
File Size	321851
Page Count	5
File Format	PDF
ISBN	0780378024
DOI	10.1109/ICC.2003.1204545
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2003-05-11
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Crosstalk AWGN Signal to noise ratio Frequency conversion Performance gain Data communication Interference cancellation Echo cancellers Degradation DSL
Content Type	Text
Resource Type	Article

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