Long-range acoustic communication in deep water using a towed array |
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Authors: | Song H C Cho S Kang T Hodgkiss W S Preston J R |
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Affiliation: | Scripps Institution of Oceanography, University of California, San Diego, La Jolla, CA 92093-0238, USA. hcsong@mpl.ucsd.edu |
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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. |
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