Patent Number: 8,818,406

Title: TDOA based positioning with calculation of correction factors for compensating the clock offsets of unsynchronized network stations

Abstract: The present invention presents a method, arrangement and computer program product for clocking exploiting the relative behavior of clocks of individual receiving stations as well as a corresponding modeling to derive a time difference of arrival of a signal from a user device which can be used to correct the time difference of arrival based on the modeled clock behavior and leads to a correct clocking of received user signals without the need of synchronization of the clocks in the various receiving stations. This principle is applicable to a plurality of pairs of receiving stations and beacon signals transmitted amongst them and allows for a correct location estimation of a user device.

Inventors: Bevan; David (Bishops Stortford, GB), Gale; Simon (Bishops Stortford, GB)


International Classification: H04W 24/00 (20090101); H04M 3/42 (20060101)

Expiration Date: 8/26/12018