Title :
Multicarrier coherent communications for the underwater acoustic channel
Author :
Bejjani, Elie ; Belfiore, Jean-Claude
Author_Institution :
Dept. Commun., Ecole Nat. Superieure des Telecommun., Paris, France
Abstract :
We propose a multicarrier transmission scheme for severely spread channels-but not overspread. The underwater acoustic channel is a good representative of this kind of channel. The technique of orthogonal data and pilot symbols allows coherent detection and therefore the use of QAM signal constellations. Some simulated performances of the proposed scheme are presented in both Rayleigh and Rician multipath fading. Acceptable error rate floors are shown to be possible for channel spread factor reaching 0.15
Keywords :
Rayleigh channels; Rician channels; acoustic signal detection; fading; multipath channels; quadrature amplitude modulation; underwater sound; QAM signal constellations; Rayleigh multipath fading; Rician multipath fading; channel spread factor; coherent detection; error rate floors; multicarrier coherent communications; multicarrier transmission scheme; orthogonal data; performances; pilot symbols; severely spread channels; underwater acoustic channel; Acoustic signal detection; Additive noise; Channel estimation; Constellation diagram; Error analysis; Fluctuations; Quadrature amplitude modulation; Underwater acoustics; Underwater communication; Underwater tracking;
Conference_Titel :
OCEANS '96. MTS/IEEE. Prospects for the 21st Century. Conference Proceedings
Conference_Location :
Fort Lauderdale, FL
Print_ISBN :
0-7803-3519-8
DOI :
10.1109/OCEANS.1996.569060
