Change search
ReferencesLink to record
Permanent link

Direct link
A low-complexity PAR-reduction method for DMT-VDSL
NUHAG (Numerical Harmonic Analysis Group), Dept. of Mathematics, University of Vienna.
Telia Research AB.
Show others and affiliations
1999 (English)In: Proceedings of the 5th International Symposium on Digital Signal Processing for Communication Systems: DSPCS'99, Perth, Australia, Feb. 1999, 1999, 164-169 p.Conference 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. 164-169 p.
Research subject
Signal Processing; Mathematics
URN: urn:nbn:se:ltu:diva-38769Local ID: d439c6b0-1b76-11dd-8c59-000ea68e967bOAI: diva2:1012270
International Symposium on Digital Signal Processing for Communication Systems : 17/02/1999
Godkänd; 1999; 20080506 (ysko)Available from: 2016-10-03 Created: 2016-10-03Bibliographically approved

Open Access in DiVA

fulltext(109 kB)0 downloads
File information
File name FULLTEXT01.pdfFile size 109 kBChecksum SHA-512
Type fulltextMimetype application/pdf

Search in DiVA

By author/editor
Grip, NiklasPersson, Lars-Erik
By organisation
Mathematical Science

Search outside of DiVA

GoogleGoogle Scholar
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

ReferencesLink to record
Permanent link

Direct link