Telecommunications – Transmitter and receiver at same station – Radiotelephone equipment detail
Reexamination Certificate
2005-02-17
2008-08-05
Trinh, Sonny (Department: 2618)
Telecommunications
Transmitter and receiver at same station
Radiotelephone equipment detail
C455S561000, C342S417000, C342S445000
Reexamination Certificate
active
07409227
ABSTRACT:
The invention relates to a radio apparatus for estimating a direction from which a received wave arrives and forming a radio transmission channel between a transmitting end of the received wave and itself. The invention aims to maintain stable transmission quality. The radio apparatus of the invention includes: two receiving sections which alternately detect two received waves that have arrived from a same transmitting end to two elements, in every period as an integer multiple of a period of each symbol of the received waves; and an arriving angle calculating section which calculates, in every period, an arriving angle as an inverse function of a difference in two phases which are proportional to a distance between the two elements, given as a function of positions of the elements and the arriving angle of the received waves, and contain a difference in phase shift amounts of the two receiving sections.
REFERENCES:
patent: 5841400 (1998-11-01), Hiramatsu
patent: 5854612 (1998-12-01), Kamiya et al.
patent: 5966095 (1999-10-01), Hiramatsu et al.
patent: 5999800 (1999-12-01), Choi et al.
patent: 6351238 (2002-02-01), Kishigami et al.
patent: 6366241 (2002-04-01), Pack et al.
patent: 6446025 (2002-09-01), Nakamura et al.
patent: 6529745 (2003-03-01), Fukagawa et al.
patent: 6781543 (2004-08-01), Nakagawa et al.
patent: 6897807 (2005-05-01), Kishigami et al.
patent: 6-273504 (1994-09-01), None
patent: 8-114662 (1996-05-01), None
patent: 10-170621 (1998-06-01), None
patent: 10-177064 (1998-06-01), None
patent: 10-229307 (1998-08-01), None
patent: 2001-281316 (2001-10-01), None
patent: 2002-107439 (2002-04-01), None
International Search Report dated Jun. 24, 2003.
Fujitsu Limited
Katten Muchin & Rosenman LLP
Trinh Sonny
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