Adaptive MMSE turbo equalization with high-order modulations and spatial diversity applied to underwater acoustic communications

Conference: European Wireless 2011 - Sustainable Wireless Technologies
04/27/2011 - 04/29/2011 at Vienna, Austria

Proceedings: European Wireless 2011

Pages: 6Language: englishTyp: PDF

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Laot, Christophe; Bidan, Raphaël Le (Institut TELECOM, TELECOM Bretagne, LabSTICC CNRS UMR 3192, Université européenne de Bretagne, Technopole Brest-Iroise - CS 83818 - 29238 Brest Cedex 3, France)

This paper presents some results on adaptive minimum mean-square error (MMSE) turbo equalization obtained from underwater experiments in the Atlantic ocean. The performance gain is evaluated as a function of the number of hydrophones at the receiver side. Single-carrier transmission with high-order modulations is considered, at a coded bit rate as high as 24 kb/s on the underwater acoustic channel. The all-digital receiver performs timing recovery, equalization, interleaving and channel decoding.