title: Diversity-based acoustic communication with a glider in deep water.
abstract: The primary use of underwater gliders is to collect oceanographic data within the water column and periodically relay the data at the surface via a satellite connection. In summer 2006, a Seaglider equipped with an acoustic recording system received transmissions from a broadband acoustic source centered at 75 Hz deployed on the bottom off Kauai, Hawaii, while moving away from the source at ranges up to ∼200 km in deep water and diving up to 1000-m depth. The transmitted signal was an m-sequence that can be treated as a binary-phase shift-keying communication signal. In this letter multiple receptions are exploited (i.e., diversity combining) to demonstrate the feasibility of using the glider as a mobile communication gateway.
authors.affiliation: Scripps Institution of Oceanography, University of California, San Diego, La Jolla, California 92093-0238.
authors.forename: H C
authors.initials: HC
authors.lastname: Song
authors.affiliation: School of Ocean and Earth Science and Technology, University of Hawaii at Manoa, Honolulu, Hawaii 96822.
authors.forename: Bruce M
authors.initials: BM
authors.lastname: Howe
authors.affiliation: Rosenstiel School of Marine and Atmospheric Science, University of Miami, Miami, Florida 33149.
authors.forename: Michael G
authors.initials: MG
authors.lastname: Brown
authors.affiliation: Applied Physics Laboratory, University of Washington, Seattle, Washington 98105.
authors.forename: Rex K
authors.initials: RK
authors.lastname: Andrew
mesh_terms: D000162:Acoustics / Q000295:instrumentation*; D004867:Equipment Design; D005240:Feasibility Studies; D009038:Motion; D009791:Oceanography / Q000295:instrumentation* / Q000379:methods; D009792:Oceans and Seas; D012623:Seawater; D012815:Signal Processing, Computer-Assisted; D013016:Sound; D013018:Sound Spectrography; D013997:Time Factors; D014159:Transducers