Patent ID: 11901972
Assignee: QUALCOMM INCORPORATED
Field: Measurement (Instruments)
Classification: CPC H  G | IPC G  H

Claim 24:
25. The apparatus of claim 20, wherein the transmitter is a first transmitter, and the apparatus further comprises:
means for obtaining a second phase difference indication corresponding to a second difference in phase between a third signal wirelessly received, at a third time, by the wireless signaling device from a second transmitter and a fourth signal wirelessly received, at a fourth time that is different from the third time, by the wireless signaling device from the second transmitter;
means for determining a second angular relationship between the second transmitter and the wireless signaling device based on the second phase difference indication, a third virtual focal point location of the third signal, and a fourth virtual focal point location of the fourth signal, the fourth virtual focal point location and the third virtual focal point location being different, wherein the second angular relationship is a second angle from a second line, connecting the third virtual focal point location and the fourth virtual focal point location, to the wireless signaling device;
means for obtaining a third phase difference indication corresponding to a third difference in phase between a fifth signal wirelessly received, at a fifth time, by the wireless signaling device from a third transmitter and a sixth signal wirelessly received, at a sixth time that is different from the fifth time, by the wireless signaling device from the third transmitter;
means for determining a third angular relationship between the third transmitter and the wireless signaling device based on the third phase difference indication, a fifth virtual focal point location of the fifth signal, and a sixth virtual focal point location of the sixth signal, the sixth virtual focal point location and the fifth virtual focal point location being different, wherein the third angular relationship is a third angle from a third line, connecting the fifth virtual focal point location and the sixth virtual focal point location, to the wireless signaling device; and
means for determining a position estimate of the wireless signaling device based on the first angular relationship, the second angular relationship, the third angular relationship, a location of the first transmitter, a location of the second transmitter, and a location the third transmitter.