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Estimating the multipath structure of an underwater channel using a single vector sensor
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Abstract(s)
This paper aims at estimating the multipath structure of an underwater acoustic channel using a single vector sensor. The
multipath structure of an underwater acoustic channel measured by a single hydrophone from broadband signals is used
for source localization or environmental monitoring applying model based methods. Usually these methods require a
number of time consuming propagation model runs and an optimization procedure. A vector sensor measures the pressure
and the particle velocity, thus in addition to delays and amplitudes estimated by a hydrophone can potentially estimate the
direction (azimuth and elevation) of the different echoes in an impulse response. This additional information can be used
to significantly reduce the number of propagation model runs and simplify the optimization procedure. Although, the estimate
of the azimuth is relatively straightforward using a single vector sensor, the estimate of the elevation of the different
echoes is difficult due to the signal bandwidth, low amplitude of the latter arrivals or sensitivity to phase errors of available
devices, among others. This paper discusses the estimates of the direction of individual echoes observed in impulse
responses gathered during the Makai’05 sea trial in the context of single vector sensor model based localization (azimuth,
range and depth).
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Citation
P. FELISBERTO, O. RODRÍGUEZ and S.M. JESUS, "Estimating the multipath structure of an underwater channel using a single vector sensor", (abstract), in Proc. of Meetings on Acoustics (POMA) of the Acoustical Society of America, 2012, no.17, 070086, January
Publisher
Acoustical Society