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This paper describes the design and successful development of an acoustic modem for potential use in underwater ecological sensor networks. The presentation includes theoretical study, design and development of both software and hardware, laboratory experiments, and the documentation and analysis of field-test results.
This paper describes the field testing of an underwater acoustic (UWA) modem in three distinct underwater environments: in the 5-7 m depth waters off the Goleta Pier in California, in the shallow 2-5 m depth waters of Viapahu Lagoon of Moorea, French Polynesia, and in a coral bommies field in Viapahu Lagoon. The modem employs M-ary direct-sequence… (More)