Peak-to-Average Power Ratio Reduction for Acoustic Orthogonal Frequency Division Multiplexing Systems

Orthogonal frequency division multiplexing (OFDM) is a modulation scheme for high-rate underwater acoustic communications that are challenged by multipath propagation. However, it has a drawback in the large peak-to-average power ratio (PAR). Techniques for PAR reduction have been extensively studied for radio communication systems. Although these techniques are applicable to acoustic systems, this research takes a different approach that aims to capitalize on the fundamental differences between the acoustic and the radio systems; namely, the fact that acoustic transmissions are inherently band limited. The tone reservation technique is extended 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 the authors' techniques can provide PAR reduction without the loss in data rate.

• Record URL:
  https://doi.org/10.4031/MTSJ.44.4.4
• Record URL:
  https://www.ingentaconnect.com/contentone/mts/mtsj/2010/00000044/00000004/art00006
• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/oclc/1623789
• Authors:
  • Rojo, Guillem
  • Stojanovic, Milica
• Publication Date: 2010-7

Language

• English

Media Info

• Media Type: Print
• Features: Figures; References;
• Pagination: pp 30-41
• Serial:
  • Marine Technology Society Journal
  • Volume: 44
  • Issue Number: 4
  • Publisher: Marine Technology Society
  • ISSN: 0025-3324
  • Serial URL: http://ingentaconnect.com/content/mts/mtsj

Subject/Index Terms

• TRT Terms: Acoustic signal processing; Communication systems; Oceanography; Sonic navigation
• Subject Areas: Data and Information Technology; Marine Transportation;

Filing Info

• Accession Number: 01340954
• Record Type: Publication
• Files: TRIS
• Created Date: May 26 2011 10:29AM