Open Access

Power Backoff Reduction Techniques for Generalized Multicarrier Waveforms

  • F. Danilo-Lemoine1,
  • D. Falconer1Email author,
  • C.-T. Lam1,
  • M. Sabbaghian1 and
  • K. Wesołowski2
EURASIP Journal on Wireless Communications and Networking20072008:437801

Received: 3 April 2007

Accepted: 18 October 2007

Published: 21 November 2007


Amplification of generalized multicarrier (GMC) signals by high-power amplifiers (HPAs) before transmission can result in undesirable out-of-band spectral components, necessitating power backoff, and low HPA efficiency. We evaluate variations of several peak-to-average power ratio (PAPR) reduction and HPA linearization techniques which were previously proposed for OFDM signals. Our main emphasis is on their applicability to the more general class of GMC signals, including serial modulation and DFT-precoded OFDM. Required power backoff is shown to depend on the type of signal transmitted, the specific HPA nonlinearity characteristic, and the spectrum mask which is imposed to limit adjacent channel interference. PAPR reduction and HPA linearization techniques are shown to be very effective when combined.


Reduction TechniqueSpectral ComponentFull ArticlePower RatioNonlinearity Characteristic

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Authors’ Affiliations

Department of Systems and Computer Engineering, Carleton University, Ottawa, Canada, K1S 5B6
Institute of Electronics and Telecommunications, Poznań University of Technology, Poznań, Poland


© F. Danilo-Lemoine et al. 2008

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.