Telecommunications – Carrier wave repeater or relay system – Portable or mobile repeater
Reexamination Certificate
2006-03-14
2006-03-14
Trinh, Sonny (Department: 2687)
Telecommunications
Carrier wave repeater or relay system
Portable or mobile repeater
C455S018000, C455S456100
Reexamination Certificate
active
07013111
ABSTRACT:
The disclosed invention provides a wireless communications terminal apparatus that calculates its accurate position, eliminating the influence of a repeater on the calculation without using complicated processing. The terminal apparatus receives signals transmitted from a plurality of radio stations and calculates its position, using the received signals. The terminal apparatus comprises repeater detection means for detecting a signal from a repeater which transmits signals that are generated on the basis of signals transmitted from one of the radio stations and indistinguishable from the signals transmitted from that radio station from among the received signals and position calculation means for calculating its position. When the repeater detection means has detected a signal from a repeater, the position calculation means ignores the detected signal from the repeater and calculates the terminal position, using the received signals from other radio stations.
REFERENCES:
patent: 6132306 (2000-10-01), Trompower
patent: 6633743 (2003-10-01), Berlinsky
patent: 2001/0036833 (2001-11-01), Koshima et al.
patent: 2002/0115448 (2002-08-01), Amerga et al.
patent: 2003/0125045 (2003-07-01), Riley et al.
patent: 07-181242 (1993-12-01), None
Fujishima Kenzaburo
Kuwahara Mikio
Mizugaki Kenichi
Ogino Atsushi
A. Marquez, Esq. Juan Carlos
Doan Phuoc
Fisher Esq. Stanley P.
Hitachi , Ltd.
Reed Smith LLP
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