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Peak-to-Average Power Ratio (PAR) reduction for acoustic OFDM systems

Author(s)
Rojo Garrave, Guillem; Stojanovic, Milica
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Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
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Abstract
A major drawback of orthogonal frequency division multiplexing (OFDM) is its large peak-to-average power ratio (PAR). Techniques for PAR reduction have been extensively studied for radio communication systems. While these techniques are applicable to acoustic systems, we take a different approach that aims to capitalize on the fundamental differences between the acoustic and radio systems, namely the fact that acoustic transmissions are inherently band-limited. We extend the tone reservation technique to the out-of-band carriers, and design efficient methods for constructing OFDM signals with lower PAR. Two approaches are investigated, one based on a gradient algorithm, and another that uses random sequences. Simulation results show that our technique can provide PAR reduction without the loss in data rate.
Date issued
2010-03
URI
http://hdl.handle.net/1721.1/60288
Department
Massachusetts Institute of Technology. Department of Mechanical Engineering
Journal
MTS/IEEE Biloxi - Marine Technology for Our Future: Global and Local Challenges, OCEANS 2009
Publisher
Institute of Electrical and Electronics Engineers
Citation
Rojo, G. and M. Stojanovic. “Peak-to-average power ratio (PAR) reduction for acoustic OFDM systems.” OCEANS 2009, MTS/IEEE Biloxi - Marine Technology for Our Future: Global and Local Challenges. 2009. 1-7. ©2010 IEEE.
Version: Final published version

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