Patent ID: 9497728
Filing Date: 2016-11-15
CPC Classification: H04W

Claim Text:
1. A position tracking system, comprising: a base station with a processor; at least three spatially separated receiver antennae disposed at locations known to the processor of the base station, each of the at least three receiver antennae receiving electromagnetic signals transmitted by a transmitting antenna of a mobile device; and one or more relay stations in communication with the base station and with the transmitting antenna of the mobile device, each relay station being disposed at a distance from the base station known to the processor of the base station, each relay station comprising a processor, one or more receiver antennae that receive the electromagnetic signals transmitted by the transmitting antenna of the mobile device, and one or more transmitter antennae, the one or more transmitter antennae of each relay station sending timing information associated with the electromagnetic signals received by the one or more receiver antennae of that relay station to the base station; wherein the processor of the base station uses the timing information associated with the electromagnetic signals received by and sent from the one or more relay stations to the base station and timing information associated with the electromagnetic signals received by the at least three spatially separated receiver antennae to compute the position of the transmitting antenna of the mobile device.