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  • Research Article
  • Open Access

Designing Tone Reservation PAR Reduction

  • 1Email author,
  • 1,
  • 2 and
  • 1
EURASIP Journal on Advances in Signal Processing20062006:038237

  • Received: 20 December 2004
  • Accepted: 8 July 2005
  • Published:


Tone reservation peak-to-average (PAR) ratio reduction is an established area when it comes to bringing down signal peaks in multicarrier (DMT or OFDM) systems. When designing such a system, some questions often arise about PAR reduction. Is it worth the effort? How much can it give? How much does it give depending on the parameter choices? With this paper, we attempt to answer these questions without resolving to extensive simulations for every system and every parameter choice. From a specification of the allowed spectrum, for instance prescribed by a standard, including a PSD-mask and a number of tones, we analytically predict achievable PAR levels, and thus implicitly suggest parameter choices. We use the ADSL2 and ADSL2+ systems as design examples.


  • Information Technology
  • Quantum Information
  • Signal Peak
  • Ratio Reduction
  • Extensive Simulation

Authors’ Affiliations

Signal Processing Group, Department of Information Technology, Lund University, Box 118, Lund, SE-221 00, Sweden
Ericsson AB, Stockholm, 126 25, Sweden


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© Niklas Andgart et al. 2006

This article is published under license to BioMed Central Ltd. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.