Telecommunications – Transmitter and receiver at separate stations – With control signal
Reexamination Certificate
2007-11-27
2007-11-27
Maung, Nay (Department: 2618)
Telecommunications
Transmitter and receiver at separate stations
With control signal
C455S041200, C455S255000, C455S265000, C370S338000
Reexamination Certificate
active
10504059
ABSTRACT:
A reference local oscillation signal transmission station1radiates a reference local oscillation signal to a service zone. A portion of the signal received by each radio slave station terminal2is branched and fed to an injection locked oscillator6. As a result, a local oscillation signal which is synchronized with the reference local oscillation signal is obtained. In the slave station terminal2, the thus-obtained local oscillation signal is fed to a transmission frequency converter (mixer)7and a reception frequency converter (mixer)8. An IF band transmission modulated signal is fed to the mixer7for frequency conversion to a radio frequency band, and the thus-obtained radio-frequency modulated signal is transmitted. Meanwhile, a received radio-frequency modulated signal is fed to the mixer8for down conversion, and the thus-obtained signal is fed to an IF band demodulator10so as to restore an information signal. The present invention not only solves the problem of deterioration of signal quality stemming from phase noise and frequency offset generated in a millimeter wave band oscillator, but also improves the efficiency of frequency use.
REFERENCES:
patent: 3931575 (1976-01-01), Amoroso, Jr.
patent: 5355523 (1994-10-01), Ogawa et al.
patent: 6184920 (2001-02-01), Masuda et al.
patent: 2003/0050083 (2003-03-01), Metais et al.
patent: 0 386 874 (1990-01-01), None
patent: 0 386 874 (1990-09-01), None
patent: 05-048491 (1993-02-01), None
patent: 05-063679 (1993-03-01), None
patent: 05-068018 (1993-03-01), None
patent: 05-206886 (1993-08-01), None
patent: 2001-53640 (2001-02-01), None
patent: 2002-9655 (2002-01-01), None
Hamaguchi Kiyoshi
Ogawa Hiroyo
Shoji Yozo
National Institute of Information and Communications Technology
Nguyen Tuan H.
Staas & Halsey , LLP
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