| 摘要 |
In one embodiment, a tracking module ( 110 ) to select a plurality of pairs of digital ultrasonic signals to form two or more pairs of digital ultrasonic signals and estimate time difference of arrival (TDOA) for each of the two or more pairs of digital ultrasonic signals. The tracking module ( 110 ) may further determine an intersection of each pair of the TDOA estimated digital ultrasonic signals to form one or more intersections and a location of an ultrasonic signal generator ( 102 ) corresponding to at least one of the one or more intersections.
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