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Iterative Joint Power Control and Partial Crosstalk Cancellation in Upstream VDSL

By H. Bagheri, H. Emami and M. R. Pakravan

Abstract

Abstract—Crosstalk is the major limiting issue in very high bitrate digital subscriber line (VDSL) systems in terms of bit-rate or service coverage. At the central office side, joint signal processing accompanied by appropriate power allocation enables complex multiuser processors to provide near capacity rates. Unfortunately complexity grows with the square of the number of lines within a binder, so by taking into account that there are only a few dominant crosstalkers who contribute to main part of crosstalk power, the canceller structure can be simplified which resulted in a much lower run-time complexity. In this paper, a multiuser power control scheme, namely iterative waterfilling, is combined with previously proposed partial crosstalk cancellation approaches to demonstrate the best ever achieved performance which is verified by simulation results. Keywords—iterative waterfilling, partial crosstalk cancellation, run-time complexity, VDSL. I

Year: 2011
OAI identifier: oai:CiteSeerX.psu:10.1.1.193.2447
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