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Joint passive time reversal and multichannel equalization for underwater communications
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Autores
Orientador(es)
Resumo(s)
Time reversal has aroused considerable interest in
communications applications as a means of partially compensating
for the intersymbol interference introduced by the channel.
This paper presents experimental results for a passive time
reversal experiment conducted off the west coast of Portugal
during the MREA’2004 mission. A single acoustic projector
generated a 2/4-PSK stream at 200 and 400 baud, modulated
around a carrier frequency of 3600 Hz. The signals were received
at a range of about 2 Km from the source on a sparse vertical
array with 8 hydrophones. We examine several strategies for
demodulating the data, including equalization, time-reversal, and
combinations of both techniques. This work emphasizes the use of
low-complexity multichannel combining algorithms for tracking
channel variations prior to generating a passively focused signal.
Descrição
Palavras-chave
Acoustic arrays Adaptive equalizers Intersymbol interference
Contexto Educativo
Citação
J.P. GOMES, A. SILVA and S. JESUS, ``Joint Passive Time Reversal and Multichannel Equalization for Underwater Communications'' in Proc. OCEANS'06, pp. 1-6.
Editora
IEEE - Institute of Electrical and Electronics Engineers