CoLlAborative eMbedded networks for submarine surveillance (CLAM) Project

In the present deliverable, we briefly summarize the current trends and state-of-theart in terms of channel modeling, physical layer design, and beamforming. We focus on typical scenarios and system parameters considered in CLAM. For example, for frequencies of practical interest in CLAM, the ray tracing approximation to the solution of the wave equation is deemed to be a good model, and is analyzed in more detail. Similarly, after a brief review of the design of currently available commercial and research modems, we will focus on the usage of the particle velocity sensor as a receiver for underwater communications. Finally, we will introduce beamforming as a technique to improve the performance of underwater communication, and focus of the beamforming capabilities of particle velocity sensors.