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Low-Complexity Doppler Compensation for OFDM-based Underwater Acoustic Communication Systems

Lookup NU author(s): Ammar Abdelkareem, Professor Bayan Sharif, Dr Charalampos Tsimenidis, Jeffrey Neasham, Emeritus Professor Oliver Hinton

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Abstract

In this paper, low-complexity Doppler-shift compensation for orthogonal frequency division multiplexing (OFDM) suitable for underwater acoustic communication (UWAC) is proposed. This algorithm exploits the integer part and the fractional part of the time expansion/compression measured within a fraction of a sample period in each OFDM to jointly estimate the Doppler-shift and the residual carrier frequency offset (CFO). Unlike block-Doppler compensation, the proposed scheme increases the throughput by utilizing single chirp pulse as a preamble. In addition, the Doppler-shift variation within the OFDM symbol is dealt with by adopting a smoothing filter. The proposed scheme was investigated in an experiment, evaluating the system performance over a range of 1 km in the North Sea during the summer of 2009.


Publication metadata

Author(s): Abdelkareem AE, Sharif BS, Tsimenidis CC, Neasham JA, Hinton OR

Publication type: Conference Proceedings (inc. Abstract)

Publication status: Published

Conference Name: IEEE Oceans Spain

Year of Conference: 2011

Pages: 1-6

Publisher: IEEE

URL: http://dx.doi.org/10.1109/Oceans-Spain.2011.6003384

DOI: 10.1109/Oceans-Spain.2011.6003384

Library holdings: Search Newcastle University Library for this item

ISBN: 9781457700866


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