Multiplex communications – Communication over free space – Combining or distributing information via time channels
Patent
1994-06-30
1997-04-08
Safourek, Benedict V.
Multiplex communications
Communication over free space
Combining or distributing information via time channels
375365, 370514, H04J 306
Patent
active
056195079
ABSTRACT:
An apparatus and method for establishing frame synchronization in a satellite communication system which receives a modulated signal having frames, such that a unique word and data are multiplexed in each of the frames. A demodulator demodulates the modulated signal and provides a demodulated signal including the unique words. A signal detector compares the signal power of the demodulated signal with a threshold signal and provides a detection signal. A selector provides, in accordance with the detection signal, the detected demodulated signal or fixed data as a selected signal. A frame synchronizing circuit detects the unique word from the selected signal, when the demodulated signal is provided as the selected signal by the selector, and establishes frame synchronization in accordance with the detected unique word.
REFERENCES:
patent: 4800560 (1989-01-01), Aoki et al.
patent: 5012491 (1991-04-01), Iwasaki
patent: 5020131 (1991-05-01), Isoe
patent: 5206887 (1993-04-01), Tsuda
patent: 5229997 (1993-07-01), Hirata et al.
patent: 5333148 (1994-07-01), Tsubaki
NEC Corporation
Ngo Ricky Q.
Safourek Benedict V.
LandOfFree
Method and apparatus for establishing and maintaining frame sync does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method and apparatus for establishing and maintaining frame sync, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for establishing and maintaining frame sync will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2401755