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FEXT Cancellation Techniques for Multiuser DMT-VDSL Systems
Jung-Soo WOO Gi-Hong IM Kyu-Min KANG
Publication
IEICE TRANSACTIONS on Communications
Vol.E87-B
No.1
pp.1-9 Publication Date: 2004/01/01 Online ISSN:
DOI: Print ISSN: 0916-8516 Type of Manuscript: PAPER Category: Transmission Systems and Transmission Equipment Keyword: far-end crosstalk (FEXT), multiuser, FEXT canceler, frequency-domain equalizer (FEQ), DMT-VDSL,
Full Text: PDF(938.3KB)>>
Summary:
This paper discusses far-end crosstalk (FEXT) cancellation methods for multicarrier transmission system. A system arrangement and its tap update method are proposed when FEXT cancelers and a frequency-domain equalizer (FEQ) are jointly adapted to combat channel intersymbol interference, FEXT, and other additive noise. We present mathematical formulation of minimum mean-square error (MSE) and the optimum tap coefficients for the FEXT cancelers and the FEQ when FEXT cancellation techniques are introduced for multiuser discrete multitone (DMT) based very high-speed digital subscriber line (VDSL) transmission. It is shown that FEXT cancellation enhances the achievable bit rate in FEXT-limited systems. Computer simulation and analytical results show that the performance of jointly adapted FEXT cancelers and an FEQ is better than that of separately adapted FEXT cancelers and an FEQ.
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