Pulse or digital communications – Spread spectrum – Direct sequence
Patent
1989-03-15
1992-05-05
Olms, Douglas W.
Pulse or digital communications
Spread spectrum
Direct sequence
360 51, H04L 710
Patent
active
051114860
ABSTRACT:
A paging receiver capable of bit synchronizing to one of two data rates. The receiver has a digital phase locked loop integrated onto a single integrated circuit clocked by a single frequency crystal. The paging receiver receives and synchronizes to a POCSAG signal which may be transmitted at either 512 bits per second or 1200 bits per second. The digital phase locked loop bit synchronizes to either data rate using a single crystal frequency of 76.8 kHz. The data rate is selected by a bit in the code paging receiver's code plug. The digital phase locked loop is constructed to have a substantially constant frequency to bandwidth ratio at both data rates.
REFERENCES:
patent: 4280099 (1981-07-01), Rattlingourd et al.
patent: 4506262 (1985-03-01), Vance et al.
patent: 4518961 (1985-05-01), Davis et al.
patent: 4534044 (1985-08-01), Funke et al.
patent: 4590602 (1986-05-01), Wolaver
patent: 4644419 (1987-02-01), Iikuma et al.
patent: 4724493 (1988-02-01), Nakamura
patent: 4808884 (1989-02-01), Hull et al.
Davis Walter L.
Drapac George A.
Oliboni Mark L.
Woltz Stephen H.
Ingrassia Vincent B.
Koch William E.
Motorola Inc.
Olms Douglas W.
Rasor Gregg E.
LandOfFree
Bit synchronizer does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Bit synchronizer, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Bit synchronizer will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1419043