Patent ID: 8583145

Claim:
A method for determining the relative position of a transponder with a radio transceiver in a personal electronic device (PED) that also includes a satellite navigation system, the method comprising: activating a locator mode in the personal electronic device; identifying a target ID associated with the transponder; transmitting a sequence that is coded for the identified target ID to the transponder with the radio transceiver; capturing samples of a radio spectrum with the transceiver for receipt of a reply from the transponder; retrieving velocity vectors from the satellite navigation system; extracting apparent velocities associated with the captured samples and the transponder; correlating the retrieved velocity vectors with the apparent velocities; and determining a time-of-flight between the transmission of the sequence and the correlated receipt of the reply from the transponder and at least one of the direction, distance, and exact location of the transponder from the locator to the transponder using the correlation.