Fast Approximation of Equalizer Coefficients for the Compensation of Narrowband Interference in xDSL Systems

Schwarz, Johannes ; Bauer, Carsten ; Fliege, Norbert J.

Document Type: Conference or workshop publication
Year of publication: 2004
Book title: Proceedings of the 9th International OFDM-Workshop (InOWo '04) : September 15th/16th in Dresden, Germany
The title of a journal, publication series: 9th International OFDM Workshop : Dresden, Germany, 2004
Page range: 77-80
Publisher: Rohling, Hermann
Place of publication: Hamburg
Publishing house: Techn. Univ., Dept. of Telecommunications
Publication language: English
Institution: School of Business Informatics and Mathematics > Elektrotechnik (Fliege 1997-2008, Em)
Subject: 004 Computer science, internet
Abstract: Wireline OFDM systems (e.g. ADSL[2+], VDSL and customized applications in process data communication) are affected by narrowband interference (NBI) as emitted for example by HAM radio or non-EMC-compatible devices. Due to the low spectral selectivity of the Discrete Fourier Transform (DFT) NBI has a |wideband effect on the transmission system which can be reduced by using an equalizer compensation matrix whose coefficients have to be adapted to any occurring NBI online. However this adaption is time consuming. The latency until the compensation is fully operative is to be shortened. We propose to compute equalizer coefficients virtually offline for a simplified noise model using parameters derived from the currently observed NBI and to take these as initial equalizer set-up to shorten the period of optimization.

Dieser Eintrag ist Teil der Universitätsbibliographie.

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