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Sensors 2018, 18(11), 3815; https://doi.org/10.3390/s18113815

Orthogonal Chirp Division Multiplexing for Underwater Acoustic Communication

1
College of Information Science and Technology, Ocean University of China, Qingdao 266100, China
2
SEACom Department, L@bisen Yncréa-Ouest, 29228 Brest CEDEX 2, France
*
Author to whom correspondence should be addressed.
Received: 28 September 2018 / Revised: 2 November 2018 / Accepted: 4 November 2018 / Published: 7 November 2018
(This article belongs to the Special Issue Underwater Sensing, Communication, Networking and Systems)
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Abstract

The objective of this study is to investigate a novel Underwater Acoustic Communication (UWAC) system based on a modulated chirp signal termed as Orthogonal Chirp Division Multiplexing (OCDM). Originating from the Fresnel transform, OCDM uses chirp signals to exploit the multipath diversity of the channel, achieving a good robustness against frequency fading, especially in the underloaded scenario where only a subset of the available waveforms is modulated. The implementation of the OCDM system for the UWAC scenario is described, and the performance results over an experimental water tank and realistic replayed underwater channel are compared against the traditional Orthogonal Frequency Division Multiplexing (OFDM) transmission scheme. View Full-Text
Keywords: UWAC; OFDM; OCDM UWAC; OFDM; OCDM
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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 (CC BY 4.0).
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Bai, Y.; Bouvet, P.-J. Orthogonal Chirp Division Multiplexing for Underwater Acoustic Communication. Sensors 2018, 18, 3815.

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