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A low-complexity PAR-reduction method for DMT-VDSL
NUHAG (Numerical Harmonic Analysis Group), Dept. of Mathematics, University of Vienna.
Telia Research AB.
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1999 (English)In: Proceedings of the 5th International Symposium on Digital Signal Processing for Communication Systems: DSPCS'99, Perth, Australia, Feb. 1999, 1999, p. 164-169Conference paper, Published paper (Refereed)
Abstract [en]

DMT-VDSL signals have a high peak-to-average power ratio (PAR). In the transmitters, the PAR governs the necessary resolution of the digital-to-analog converter (DAC) and is an important factor for the power consumption of the line-driver. Aiming at implementation in a specific system, we propose a low complexity PAR-reduction method based on the iterative algorithm derived in [5, 20, 24, 25]. We maintain good performance while stressing a straigthforward and low-complex implementation. Key elements of the method are: low latency; no loss in data rate; precalculated and stored peak-cancellation waveform; and bit-shifts (multiplication with powers of two) replacing the scaling of the waveform. Computer simulations show that, for a DMT frame length of 4096 samples and a frame clip rate of 10-4, the PAR can be reduced about 1.5 to 2.0 dB, depending on the number of peaks cancelled. When multiplication is replaced by bit-shifts, the reduction is still 1.5-1.7 dB.

Place, publisher, year, edition, pages
1999. p. 164-169
National Category
Signal Processing Mathematical Analysis
Research subject
Signal Processing; Mathematics
Identifiers
URN: urn:nbn:se:ltu:diva-38769Local ID: d439c6b0-1b76-11dd-8c59-000ea68e967bOAI: oai:DiVA.org:ltu-38769DiVA: diva2:1012270
Conference
International Symposium on Digital Signal Processing for Communication Systems : 17/02/1999
Note
Godkänd; 1999; 20080506 (ysko)Available from: 2016-10-03 Created: 2016-10-03 Last updated: 2017-11-25Bibliographically approved

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CiteExportLink to record
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