Next generation cognitive system approaches in the underwater communication area

The terrestrial communication enables Internet-based, comprehensive and system-wide telecommunication services. However, these bandwidth-intensive developments fail for the underwater area – why? The purpose of this article is to provide first approach to a possible key solution for robust point to point acoustic communication in an underwater environment. A cognitive system involving model based a priori information was investigated to achieve this goal. Our discussion is focused on developing a robust and all-weather system model which estimates cognitive parameters needed for communication.We also present the concept of using the BELLHOP model with the GNU radio framework for this purpose by discussing and analyzing a flexible OFDM transmission scheme. Adaptive features such as frequency agility, location awareness and transmit power control are explained with this model based approach in the underwater context.

▸ First approaches to a possible key solution for robust underwater communication. ▸ Use of a cognitive system involving model based a priori information. ▸ Robust and all-weather communication system model estimating cognitive parameters. ▸ New a priori information through deductive inference providing optimal parameters. ▸ Effects of spatial variability are observed based on optimal frequency and sea state.