| 摘要 |
<p>An underwater device receives underwater signals from a pair of beacon units. Based on these signals, a processing circuit in the device determines a distance and a direction to each beacon unit. The underwater device also measures a depth for the device, and an angle of arrival of one or both of the incoming signals. Based on the distances to the two beacon units, the depth of the device, and the measured angle of arrival, the processing circuit can determine a current underwater location for the device.</p> |
