Peak-to-Average Power Ratio (PAR) reduction for acoustic OFDM systems
Author(s)Rojo Garrave, Guillem; Stojanovic, Milica
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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.
DepartmentMassachusetts Institute of Technology. Department of Mechanical Engineering
MTS/IEEE Biloxi - Marine Technology for Our Future: Global and Local Challenges, OCEANS 2009
Institute of Electrical and Electronics Engineers
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.
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