Initialization and Bitloading of Discrete Multi-Tone Transceivers for Channels with Unknown Impulse Response Length

Karp, Tanja ; Bauer, Carsten ; Fliege, Norbert J.

Document Type: Conference or workshop publication
Year of publication: 2004
Book title: 2004 IEEE 11th Digital Signal Processing Workshop & 2nd [vielm. 3rd] IEEE Signal Processing Education Workshop, Taos Ski Valley, NM, 1 - 4 August 2004
Page range: 196-200
Place of publication: Piscataway, NJ [u.a.]
Publishing house: IEEE Operations Center
ISSN: 0-7803-8434-2
Publication language: English
Institution: School of Business Informatics and Mathematics > Elektrotechnik (Fliege 1997-2008, Em)
Subject: 004 Computer science, internet
Abstract: In this paper we consider a DMT transceiver with a guard|interval of insufficient length. We describe an algorithm that|estimates the channel impulse response correctly independently|of its length while keeping the guard interval at the|preset length. The training sequence is designed such that|inter-symbol and inter-carrier interference cancel. We then|show that calculating the one-tap equalizer per subcarrier|as the inverse of the channel frequency response at the subcarrier|frequency is not optimal in presence of interference.|We also propose an improved bitloading algorithm based on|measured signal-to-noise-and-interference ratios.

Dieser Eintrag ist Teil der Universitätsbibliographie.

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