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Time-frequency approach to multipath underwater channel deconvolution
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Orientador(es)
Resumo(s)
Blind deconvolution is presented in the underwater acoustic
channel context, by time-frequency processing. The acoustic
propagation environment was modelled as a multipath
propagation channel. For noiseless simulated data, source
signature estimation was performed by a model-based method.
The channel estimate was obtained via a time-frequency
formulation of the conventional matched-filter. Simulations
used a ray-tracing physical model, initiated with
at-sea recorded environmental data, in order to produce realistic
underwater channel conditions. The quality of the
estimates was 0.793 for the source signal, and close to 1
for the resolved amplitudes and time-delays of the impulse
response. Time-frequency processing has proved to overcome
the typical ill-conditioning of single sensor deterministic
deconvolution techniques.
Descrição
Palavras-chave
Contexto Educativo
Citação
N. MARTINS, "A Time-Frequency Approach to Blind Deconvolution in Multipath Underwater Channels" in IEEE International Conference on Acoustics, Speech, and Signal Processing (ICASSP), 2002, pp. 1225-1228.
Editora
IEEE