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Experimental detection and reception performance for uplink underwater acoustic communication using a remote, in-air, acousto-optic sensor

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2 Author(s)
Blackmon, F.A. ; Naval Undersea Warfare Center, Newport, RI ; Antonelli, L.T.

Covert communications between underwater and aerial platforms would increase the flexibility of surface and air vehicles engaged in undersea warfare by providing a new netcentric warfare communications capability and could have a variety of commercial and oceanographic applications. Research into an acousto-optic sensor shows promise as a means for detecting acoustic data projected toward the water surface from a submerged platform. The laser-based sensor probes the water surface to detect perturbations caused by an impinging acoustic pressure field. Experimental studies were conducted to demonstrate acousto-optic sensor feasibility for obtaining accurate phase preserved recordings of communication signals across the air-water interface. The recorded surface velocity signals were transferred to an acoustic communications receiver that used conventional acoustic telemetry algorithms such as adaptive equalization to decode the signal. The detected, equalized, and decoded bit error rate performance is presented for hydrostatic and more realistic, hydrodynamic water surface conditions

Published in:

Oceanic Engineering, IEEE Journal of  (Volume:31 ,  Issue: 1 )