Mutual frequency locking across a link

Details Mutual frequency locking across a link Mutual frequency locking across a link

2005-07-26

2005-07-26

Pham, Chi (Department: 2667)

Multiplex communications

Duplex

Communication over free space

C370S516000, C455S073000, C455S265000, C375S362000, C375S371000, C331S046000

Reexamination Certificate

active

06922402

ABSTRACT:
Transmitter frequency locking across a full duplex communications link. An offset in one transmitter results in an offset at the corresponding receiver. That receiver offset shifts its transmitter in a corresponding manner, causing a correcting offset in the first receiver, which is used to correct the first transmitter. A first embodiment uses filtered received frequency information derived from a baseband demodulator to correct transmitter frequency. A second embodiment uses filtered frequency information from a frequency detector to correct transmitter frequency.

REFERENCES:
patent: 4759078 (1988-07-01), Schiller
patent: 5526527 (1996-06-01), Lipowski et al.
patent: 5640431 (1997-06-01), Bruckert et al.
patent: 5995812 (1999-11-01), Soleimani et al.
patent: 6442374 (2002-08-01), Brady et al.
Cesar Carralero et al—“Automatic Reference Oscillator Tuning Strategy”; Motorola Technical Developments, Motorola Inc., Schaumburg, Illinois, U.S.; vol. 10, Mar. 1990; pp. 34-35.
A. Plattner et al—“A 60 GHZ Hand-Held LPI-Transceiver”; Proceedings Of The European Microwave Conference, Helsinki, Sep. 13-17, 1982; Sevenoaks, Microwave Exhibitions, GB; vol. Conf. 12, 1982, pp. 540-544.
European Search Report—EP 01 30 0377 dated Jul. 18, 2002.

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