Communications: directive radio wave systems and devices (e.g. – Directive – Position indicating
Reexamination Certificate
2007-10-31
2009-02-24
Phan, Dao L (Department: 3662)
Communications: directive radio wave systems and devices (e.g.,
Directive
Position indicating
Reexamination Certificate
active
07495613
ABSTRACT:
A system and a method for position determination by impulse radio using a first transceiver having a first clock providing a first reference signal and a second transceiver placed spaced from the first transceiver. The system determines the position of the second transceiver. The second transceiver has a second clock that provides a second reference signal. A first sequence of pulses are transmitted from the first transceiver. The first sequence of pulses are then received at the second transceiver and the second transceiver is then synchronized with the first sequence of pulses. A second sequence of pulses are transmitted from the second transceiver. The first transceiver receives the second sequence of pulses and the first transceiver is synchronized with the second sequence of pulses. A delayed first reference signal is generated in response to the synchronization with the second sequence of pulses. A time difference between the delayed first reference signal and the first reference signal is then measured. The time difference indicates a total time of flight of the first and second sequence of pulses. The distance between the first and the second transceiver is determined from the time difference. The direction of the second transceiver from the first transceiver is determined using a directional antenna. Finally, the position of the second transceiver is determined using the distance and the direction.
REFERENCES:
patent: 4206462 (1980-06-01), Rabow et al.
patent: 4908600 (1990-03-01), Martinez
patent: 5241562 (1993-08-01), Partyka et al.
patent: 5365516 (1994-11-01), Jandrell
patent: 5381151 (1995-01-01), Boles et al.
patent: 5589838 (1996-12-01), McEwan
patent: 5754961 (1998-05-01), Serizawa et al.
patent: 5796363 (1998-08-01), Mast
patent: 5835054 (1998-11-01), Warhus et al.
patent: 5904296 (1999-05-01), Doherty et al.
patent: 6054950 (2000-04-01), Fontana
patent: 6121927 (2000-09-01), Kalliojarvi
patent: 6400754 (2002-06-01), Fleming et al.
patent: 2003/0164794 (2003-09-01), Haynes et al.
Cowie Ivan A.
Fullerton Larry W.
Richards James L.
Babayi Robert S.
Phan Dao L
Time Domain Corporation
Venable LLP
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