Single hydrophone source localization

S.M. Jesus
Universidade do Algarve,  Campus de Gambelas,
PT-8000 Faro, Portugal.
M.B. Porter
Dept. of Mathematical Sciences, NJIT,
Newark, NJ, USA.
Y. Stephan  X. Demoulin
CMO - Service Hidrographique et Oceanographique de la Marine,
F-29275 Brest Cedex, France.
O. Rodríguez
Universidade do Algarve,  Campus de Gambelas,
PT-8000 Faro, Portugal.
E. Coelho
Instituto Hidrografico,  Rua das Trinas 49, PT-1296,
Lisboa Codex, Portugal.

Comments: download a pdf file.
Ref.: IEEE Journal of Oceanic Engineering, Vol.25, No.3, pp.337 - 346, 2000.

AbstractThe method presented in this paper assumes that the received signal is a linear combination of delayed and attenuated uncorrelated replicas of the source emitted waveform. The set of delays and attenuations, together with the channel environmental conditions, provide sufficient information for determining the source location. If the transmission channel is assumed known, the source location can be estimated by matching the data with the acoustic field predicted by the model conditioned on the estimated delay set. This paper presents alternative techniques, that do not directly attempt to estimate time delays from the data but, instead, estimate the subspace spanned by the delayed source signal paths. Source localization is then done using a family of measures of the distance between that subspace and the subspace spanned by the replicas provided by the model. Results obtained on the INTIMATE'96 data set, in a shallow water acoustic channel off the coast of Portugal, show that a sound source emitting a 300-800 Hz LFM sweep could effectively be tracked in range and depth over an entire day .

ACKNOWLEDGMENT: this work was partially supported by the EU project MAS2-CT920022.