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This paper proposes an underwater positioning system using acoustic signals that is suitable for submersible vehicles and wireless sensor network applications. The system employs two underwater speakers that serve as anchor nodes, a hydrophone as a receiver, and a pressure-based depth sensor. Fast Fourier transform (FFT) is used to classify acoustic signals from each speaker based on a unique, identifying...
This paper proposes an underwater positioning system (UPS) for remotely operated underwater vehicle (ROV). The system uses two underwater speakers as anchor nodes and a hydrophone as a receiver node. Time-of-arrival (ToA) is locally measured by sensors to identify distances from the hydrophone to the two anchor nodes. Then, using 2-D trilateration algorithm and depth from a pressure sensor, the position...
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