Abstract
Underwater acoustic data communication is critical for naval and scientific underwater missions. For example, high‐rate telemetry between underway autonomous underwater vehicles (AUVs) and surface platforms can facilitate adaptive sampling of the ocean. Multiple‐input/multiple‐output (MIMO) systems can deliver significant increased channel capacity for underwater communications. At the University of Delaware, an acoustic MIMO communication testbed on a Gavia AUV has been developed for digital communication measurements at the frequency band of 20–30 kHz. The Gavia AUV is a modular, small‐size vehicle (20 cm in diameter, 77 kg in air) with a depth rating of 200 m. With advanced navigation systems (INS) and surface communication capabilities (WiFi and Iridium), it has been tested through various coastal‐ocean missions. The MIMO system on board is designed for easy, low‐cost deployment, and is capable of conducting acoustical sampling via a towed array with or without single‐element or multi‐element source transmission. In the presentation, the design concept, component detail, and engineering test results will be shown. [Work supported by ONR 321OA.]
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