Patent ID: 9729227
Date: 2017-08-08
CPC Classifications: G01S,H04B

Claim:
1. A method comprising: defining a first audio signal having specific signal characteristics making the first audio signal recognizable by at least another user device; causing a first user device to broadcast the first audio signal according to the defined signal characteristics, while the first user device is in motion; receiving, via a computer network, data associated with a first identifiable version of the first audio signal having the specific signal characteristics as received at a second user device in audible proximity to the first user device; receiving, via the computer network, data associated with a second identifiable version of the first audio signal having the specific signal characteristics as received at a third user device in audible proximity to the first user device; estimating a position and orientation of the first user device relative to the second user device and the third user device based on a detected difference in the first and second identifiable versions of the first audio signal as received at the second user device and the third user device; and generating, while the first user device is in motion, a spatial model that tracks a motion of the first user device relative to the second user device and the third user device based on a plurality of estimated positions and orientations of the first user device over a period of time.