Patent ID: 8712690

Claim:
A non-time of flight or time of arrival position location system, comprising: a receiver to receive a plurality of broadcast signals, each of the plurality of received signals characterized by a respective signal strength and by data that uniquely identifies an originating one of a plurality of terrestrial radio frequency beacons positioned in a respective known location within an indoor environment; at least one input/output device; a processor communicably coupled to the receiver and the at least one input/output device; and processor-executable instructions that cause the processor to: determine an initial receiver location relative to the known locations of at least some of the plurality of beacons; for each of the received broadcast signals, iteratively determine an updated receiver location relative to the known locations of the at least some of the plurality of beacons by causing the processor to: determine a vector quantity including a magnitude and a direction associated with each of the plurality of received broadcast signals to provide a respective plurality of vector quantities; and sum the resultant plurality of vector quantities to determine the updated receiver location until a number of consecutive iterations provide updated receiver locations falling within a defined limit; and generate at least one human-perceptible output indicative of the updated receiver location via the at least one output device.