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Self-synchronizing a DMT-based VDSL system
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- Nilsson, Rickard (author)
- Luleå tekniska universitet,Signaler och system
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- Sjöberg, Frank (author)
- Luleå tekniska universitet
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- Isaksson, Mikael (author)
- Luleå tekniska universitet
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- Cioffi, J.M. (author)
- Stanford University
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- Wilson, S.K. (author)
- ArrayComm, San Jose
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(creator_code:org_t)
- Piscataway, NJ : IEEE Communications Society, 2001
- English.
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In: Where minds meet. - Piscataway, NJ : IEEE Communications Society. ; , s. 1249-1253
- Related links:
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Subject headings
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- We present an algorithm for self-synchronizing all modems in a discrete multitone (DMT)-based very high-speed digital subscriber line (VDSL) system using the Zipper duplex method. This solves the problem with non-orthogonal near-end crosstalk (NEXT) that appears in systems with unsynchronized modems. The algorithm we present runs autonomously in each VDSL-modem. It uses the auto-correlation of the DMT-signal to determine the frame-offset of other users, and adjusts the own frame-timing to be better aligned with the other users. With our method all modems will be self-synchronized to within a small fraction of the total DMT frame-length. This self-synchronization suppresses the NEXT to a level far below the background noise-floor. This means that our self-synchronized system has the same performance as a system where all modems are perfectly synchronized to a master clock
Subject headings
- TEKNIK OCH TEKNOLOGIER -- Elektroteknik och elektronik -- Signalbehandling (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Electrical Engineering, Electronic Engineering, Information Engineering -- Signal Processing (hsv//eng)
Keyword
- Signalbehandling
- Signal Processing
Publication and Content Type
- ref (subject category)
- kon (subject category)
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