|START||NEW VOL 20||SEARCH||STATISTICS||PAS - GDANSK DIVISION|
pp. 79-88, vol. 7, 2004
University of Technology and Agriculture in Bydgoszcz, Bydgoszcz, Poland
Abstract: A multipath problem in an underwater acoustic channel is discussed in this paper. For underwater acoustic communications the main problem encountered is the presence of multipath propagation caused by reflection and scattering of the transmitted signals at the surface and the bottom. Multipath propagation causes significant degradation of the underwater acoustic communication signals. Echos, which are delayed from direct path underwater acoustic signals, can be represented by impulse responses, which have cepstrums concentrated farther from the cepstral origin. A cepstral analysis and homomorphic deconvolution method is discussed as a means of detecting the multipath effect. The results of numerical simulation are presented in this paper.
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