Automatic frequency control processing in multi-channel...

Details Automatic frequency control processing in multi-channel... Automatic frequency control processing in multi-channel...

2006-06-13

2006-06-13

Urban, Edward F. (Department: 2685)

Telecommunications

Receiver or analog modulated signal frequency converter

Signal selection based on frequency

C455S164200, C455S136000, C455S192200, C375S344000, C375S339000

Reexamination Certificate

active

07062240

ABSTRACT:
A multiple channel receiver (200) includes a communications receiver synthesizer (204) and at least one numerically controlled oscillator (NCO) (406) that produce local oscillator signals that are derived from a common reference oscillator (202). A DSP (212) and CPU (214) perform automatic frequency control (AFC) by adjustment of the reference oscillator (202) based upon a signal received by a receive channel using the local oscillator signal produced by the communications receiver synthesizer (204). The CPU (214) also provides a synchronous indication of adjustments to the reference oscillator (202) to control circuitry for the at least one NCO (406) so that the configuration of the NCO (406) can be altered so as to maintain a substantially constant frequency output during the adjustment of the reference oscillator (202).

REFERENCES:
patent: 5416808 (1995-05-01), Witsaman et al.
patent: 5654718 (1997-08-01), Beason et al.
patent: 5841396 (1998-11-01), Krasner
patent: 5856766 (1999-01-01), Gillig et al.
patent: 5901171 (1999-05-01), Kohli et al.
patent: 6009118 (1999-12-01), Tiemann et al.
patent: 6121923 (2000-09-01), King
patent: 6122506 (2000-09-01), Lau et al.
patent: 6163710 (2000-12-01), Blaser et al.
patent: 6208291 (2001-03-01), Krasner
patent: 6208292 (2001-03-01), Sih et al.
patent: 6424826 (2002-07-01), Horton et al.
patent: 6546040 (2003-04-01), Eschenbach
patent: 6618006 (2003-09-01), Syrjarinne
patent: 6697016 (2004-02-01), Voor et al.
patent: 2004/0063411 (2004-04-01), Goldberg et al.
patent: 2004/0142701 (2004-07-01), Abraham

Affiliated with

Also associated with

Rating

Automatic frequency control processing in multi-channel... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Automatic frequency control processing in multi-channel..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Automatic frequency control processing in multi-channel... will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3628762