Telecommunications – Transmitter and receiver at separate stations – Plural transmitters or receivers
Patent
1996-10-31
1998-09-01
Britton, Howard
Telecommunications
Transmitter and receiver at separate stations
Plural transmitters or receivers
370324, 370350, 370503, 455503, 455 71, 455119, 455260, 455265, H04L 708
Patent
active
058017836
ABSTRACT:
Within a communication system, driving a numerically controlled oscillator with a frequency of a precision frequency oscillator and adjusting the frequency of the numerically controlled oscillator by a calculated number to be equal to that of a frequency signal derived from an external source. The calculated number utilized to adjust the numerically controlled oscillator is then transmitted to each of a number of subunits. Each subunit has another numerically controlled oscillator that is driven by a frequency derived from an internal communication link connecting the subunit to the communication system; and the other numerically controlled oscillator is controlled by the calculated number so that its frequency matches the frequency of the precision oscillator. The frequency of the internal communication link is controlled by the precision oscillator. In a second embodiment, a frequency signal derived from an external source is used to drive a numerically controlled oscillator whose frequency is adjusted by a calculated number to be equal to that of a precision frequency oscillator. The calculated number utilized to adjust the numerically controlled oscillator is then transmitted to each of a number of subunits. Each subunit has another numerically controlled oscillator that is driven by a frequency derived from an internal communication link connecting the subunit to the communication system; and the other numerically controlled oscillator is controlled by the calculated number so that its frequency matches the frequency of the precision oscillator. The internal communication link is frequency locked to the external source.
REFERENCES:
patent: 4516269 (1985-05-01), Krinock
patent: 4517669 (1985-05-01), Freeburg et al.
patent: 4589066 (1986-05-01), Lam et al.
patent: 4617674 (1986-10-01), Mangulis et al.
patent: 4633193 (1986-12-01), Scordo
patent: 4649543 (1987-03-01), Levine
patent: 4665404 (1987-05-01), Christy et al.
patent: 4672658 (1987-06-01), Kavehrad et al.
patent: 4688210 (1987-08-01), Eizenhofer et al.
patent: 4696052 (1987-09-01), Breeden
patent: 4718109 (1988-01-01), Breeden et al.
patent: 4754453 (1988-06-01), Eizenhofer
patent: 4933890 (1990-06-01), Nuytkens
patent: 4985891 (1991-01-01), Fujiwara et al.
patent: 5023572 (1991-06-01), Caldwell et al.
patent: 5117424 (1992-05-01), Cohen et al.
patent: 5123112 (1992-06-01), Choate
patent: 5177766 (1993-01-01), Holland et al.
patent: 5184347 (1993-02-01), Farwell et al.
patent: 5187806 (1993-02-01), Johnson et al.
patent: 5189670 (1993-02-01), Inglis
patent: 5228038 (1993-07-01), Jestice et al.
patent: 5388102 (1995-02-01), Griffith et al.
patent: 5511090 (1996-04-01), Denton
Stallings, W., ISDN An Introduction, Macmillan Publishing Company, New York, 1989, pp. 281-287.
Baxter, et al., Communications and Control Architecture, AT&T Technical Journal, vol. 64, No. 1, Jan. 1985, pp. 153-173.
Wireless PBX, Western Communications Forum, Anaheim, CA, Feb. 2-5, 1992, Ericsson Business Communications Inc.
Britton Howard
Lucent Technologies - Inc.
Moran John C.
LandOfFree
Remote accurate frequency generation using a numerically control does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Remote accurate frequency generation using a numerically control, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Remote accurate frequency generation using a numerically control will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-275285