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dc.contributor.authorUdovydchenkov, Ilya A.  Concept link
dc.date.accessioned2017-04-27T17:42:58Z
dc.date.issued2017-04-07
dc.identifier.urihttps://hdl.handle.net/1912/8950
dc.description© The Author(s), 2017. This is the author's version of the work. It is posted here under a nonexclusive, irrevocable, paid-up, worldwide license granted to WHOI. It is made available for personal use, not for redistribution. The definitive version was published in Journal of Sound and Vibration 400 (2017): 402-416, doi:10.1016/j.jsv.2017.03.035.en_US
dc.description.abstractModal pulses are broadband contributions to an acoustic wave field with fixed mode number. Stable weakly dispersive modal pulses (SWDMPs) are special modal pulses that are characterized by weak dispersion and weak scattering-induced broadening and are thus suitable for communications applications. This paper investigates, using numerical simulations, receiver array requirements for recovering information carried by SWDMPs under various signal-to-noise ratio conditions without performing channel equalization. Two groups of weakly dispersive modal pulses are common in typical mid-latitude deep ocean environments: the lowest order modes (typically modes 1–3 at 75 Hz), and intermediate order modes whose waveguide invariant is near-zero (often around mode 20 at 75 Hz). Information loss is quantified by the bit error rate (BER) of a recovered binary phase-coded signal. With fixed receiver depths, low BERs (less than 1%) are achieved at ranges up to 400 km with three hydrophones for mode 1 with 90% probability and with 34 hydrophones for mode 20 with 80% probability. With optimal receiver depths, depending on propagation range, only a few, sometimes only two, hydrophones are often sufficient for low BERs, even with intermediate mode numbers. Full modal resolution is unnecessary to achieve low BERs. Thus, a flexible receiver array of autonomous vehicles can outperform a cabled array.en_US
dc.language.isoen_USen_US
dc.relation.urihttps://doi.org/10.1016/j.jsv.2017.03.035
dc.subjectOcean acousticsen_US
dc.subjectWeakly dispersive modal pulsesen_US
dc.subjectLong-range sound propagationen_US
dc.subjectUnderwater communicationsen_US
dc.titleArray design considerations for exploitation of stable weakly dispersive modal pulses in the deep oceanen_US
dc.typePreprinten_US


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