Repeater identification in position determination system

Details Repeater identification in position determination system Repeater identification in position determination system

2006-07-04

2006-07-04

Vuong, Quochien B. (Department: 2684)

Telecommunications

Carrier wave repeater or relay system

Portable or mobile repeater

C455S427000, C455S011100, C455S018000

Reexamination Certificate

active

07072612

ABSTRACT:
A method of identifying whether a first signal received at a subscriber station has been relayed by a repeater. The method involves measuring at the subscriber station a time difference of arrival between the first signal and a second signal. A hyperboloid or other potential solution surface is then formed from the measured time difference of arrival. A determination is then made whether or not the first signal was relayed by a repeater based on information derived from the potential solution surface.

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patent: 2353648 (2001-02-01), None
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