Self-synchronization and spatial diversity of passive time reversal communication

TitleSelf-synchronization and spatial diversity of passive time reversal communication
Publication TypeJournal Article
Year of Publication2015
AuthorsSong HC, Hodgkiss WS
JournalJournal of the Acoustical Society of America
Date Published2015/05
Type of ArticleArticle
ISBN Number0001-4966
Accession NumberWOS:000354962900050
Keywordschannel; equalization; ocean; phase-conjugation; retrofocusing; shallow-water; techniques; underwater acoustic communication

Time reversal (TR) achieves spatial and temporal focusing in complex environments. In the context of communications, passive (uplink) TR is equivalent to active (downlink) TR with the communications link being in opposite directions but with the same theoretical performance. The benefit of passive TR, however, is its natural self-synchronization, making TR communications robust and readily extended to cases involving temporal diversity and synthetic aperture communications. Self-synchronization is examined analytically and demonstrated with shallow water experimental data. In addition, the impact of spatial diversity on communications performance is investigated in terms of the aperture and element spacing of the 64-element vertical receive array. (C) 2015 Author(s). All article content, except where otherwise noted, is licensed under a Creative Commons Attribution 3.0 Unported License.

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