Efficient use of bandwidth for underwater acoustic communication

TitleEfficient use of bandwidth for underwater acoustic communication
Publication TypeJournal Article
Year of Publication2013
AuthorsSong HC, Hodgkiss WS
JournalJournal of the Acoustical Society of America
Date Published2013/08
Type of ArticleArticle
ISBN Number0001-4966
Accession NumberWOS:000322738900024
Keywordschannel; shallow-water

In a recent shallow water experiment, acoustic communication transmissions were carried out over the 10 to 32 kHz band in similar to 100m deep water over a 3 km range. A natural question is how best to utilize that bandwidth. In one multiband approach discussed previously, the band was divided into four smaller subbands that were processed independently using time reversal decision-feedback equalizers (TR-DFEs). This letter presents a complementary wideband approach using data from the same experiment achieving a data rate of up to 60 kbits/s with 32 quadrature amplitude modulation. These results suggest that a wideband approach can be beneficial in terms of spectral efficiency with modest computational complexity using a TR-DFE. (C) 2013 Acoustical Society of America.

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