Time acquisition in a wireless position determination system

Details Time acquisition in a wireless position determination system Time acquisition in a wireless position determination system

2005-06-14

2005-06-14

Beamer, Temica M. (Department: 2681)

Telecommunications

Carrier wave repeater or relay system

Portable or mobile repeater

C455S502000, C455S013200, C342S357490, C342S357490

Reexamination Certificate

active

06907224

ABSTRACT:
A system and method provide aiding information to a wireless device. The wireless device extracts a snippet of a received reference signal, generates a timestamp representing the time of reception thereof, and transmits the snippet and timestamp to a position determination entity (PDE). The PDE receives and stores a reference signal along with its reception time, and receive the snippet and timestamp from the wireless device. The PDE matches the snippet to a portion of the stored reference signal, and determines a time offset between the timestamp and the time of reception of the matched portion of the stored reference signal, The PDE then prepares the aiding information, synchronizes it to the wireless device using the time offset, and transmits the synchronized aiding information to the wireless device.

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