Patent ID: 9288633
Filing Date: 2016-03-15
CPC Classification: G01S,H04W

Claim Text:
1. A method of detecting a revisit position, the method comprising: receiving at a computing system a plurality of position data points, each of the plurality of position data points including a signal scan measurement; calculating, at the computing system, a first signal distance between a first signal scan measurement corresponding to a first position data point of the plurality of position data points and a second signal scan measurement corresponding to a second position data point of the plurality of position data points; determining, at the computing system, that the first signal distance is less than a first threshold, that the first signal distance is a local minimum for the first position data point, and that the first signal distance is a local minimum for the second position data point; and based on the determining, identifying, at the computing system, the first and second position data points as revisit points.