title: Long-range acoustic communication in deep water using a towed array.
abstract: In September 2010 a long-range acoustic communication (LRAC10) experiment was carried out in deep water off the Southern California Coast. The experiment involved two mobile components: (1) a source towed slowly at a speed of 2-3 knots at ∼75-m depth and (2) a horizontal line array towed at 3.5 knots at a depth of ∼200 m. Phase-coherent communication sequences were transmitted in the frequency band of 200-300 Hz at various ranges (100-700 km). Initial analysis of the LRAC10 data demonstrates that an information rate of 50 bits/s can be achieved over ∼550-km range using quadrature-phase shift-keying (QPSK) modulation and error-correction coding combined with beamforming.
authors.affiliation: Scripps Institution of Oceanography, University of California, San Diego, La Jolla, CA 92093-0238, USA. hcsong@mpl.ucsd.edu
authors.forename: H C
authors.initials: HC
authors.lastname: Song
authors.forename: S
authors.initials: S
authors.lastname: Cho
authors.forename: T
authors.initials: T
authors.lastname: Kang
authors.forename: W S
authors.initials: WS
authors.lastname: Hodgkiss
authors.forename: J R
authors.initials: JR
authors.lastname: Preston
mesh_terms: D000162:Acoustics / Q000295:instrumentation*; D004867:Equipment Design; D009038:Motion; D009792:Oceans and Seas; D012815:Signal Processing, Computer-Assisted; D013016:Sound; D013018:Sound Spectrography; D013997:Time Factors; D014867:Water
chemical_list: D014867:Water