Underwater acoustic modem using multi-carrier modulation

Lam F. Yeung, Robin S. Bradbeer, Eric T.M. Law, Angus Wu, Bin Li, Zhong G. Gu

Research output: Chapters, Conference Papers, Creative and Literary WorksRGC 32 - Refereed conference paper (with host publication)peer-review

4 Citations (Scopus)

Abstract

An underwater digital acoustic communications system based on multicarrier modulation technique is presented. This technique is relatively robust in a strong mulripath fading environment and has been successfully tested in a shallow water channel at a data rate up to 10kbps over 1km. The test system using 48 carrier frequencies for transmitting 48 parallel bits of data in each packet. The data stream is encoded into a sequence of packets. These packets are encapsulated by headers, synchronisation and training signals. In order to reduce the mnltipath fading problem, an adaptive channel equalisation scheme with a LSM algorithm is used. The mulripath fading problem can be further improved by a redundant carrier assignment and wavelet based MFM scheme. The advantage of this scheme is that the fading is reduced without affecting the channel capacity.
Original languageEnglish
Title of host publicationOceans 2003: Celebrating the Past... Teaming Toward the Future
PublisherIEEE
Pages1368-1375
Volume3
ISBN (Electronic)0933957327, 0933957319
ISBN (Print)0933957300, 9780933957305
DOIs
Publication statusPublished - Sept 2003
EventOceans 2003 - Marine Technology Society, Institute of Electrical and Electronics Engineers Conference, MTS/IEEE - San Diego, United States
Duration: 22 Sept 200326 Sept 2003

Publication series

NameOceans Conference Record (IEEE)
PublisherIEEE
ISSN (Print)0197-7385

Conference

ConferenceOceans 2003 - Marine Technology Society, Institute of Electrical and Electronics Engineers Conference, MTS/IEEE
Country/TerritoryUnited States
CitySan Diego
Period22/09/0326/09/03

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