Pulse or digital communications – Repeaters – Testing
Patent
1986-11-24
1988-08-16
Safourek, Benedict V.
Pulse or digital communications
Repeaters
Testing
332 9R, H04L 2720
Patent
active
047649402
ABSTRACT:
A modulator for a modem, said modulator being adapted to convert a bit stream, wherein each given number of successive bits defines a symbol, into a phase modulated intermediate frequency (IF) signal, the symbols in the modulator section being phase modulated DPSK conversion. The phase modulated symbols are then digitally filtered to provide a filtered signal comprising time shared, digital in-phase and quadrature phase components that, when converted into an analog signal, provides a modulation signal of a frequency that is centered about a predetermined frequency and deviates therefrom in accordance with the value of the phase modulated symbol. The filtered signal, after being converted to an analog signal is then filtered and passed to a mixer for up conversion to an IF signal.
REFERENCES:
patent: 4049909 (1977-09-01), Peck
patent: 4268727 (1981-05-01), Agrawal et al.
patent: 4358853 (1982-11-01), Qureshi
patent: 4562415 (1985-12-01), McBiles
patent: 4575858 (1966-03-01), Dow
patent: 4583238 (1986-04-01), Boisseau et al.
patent: 4672633 (1987-06-01), Claasen et al.
Critchlow David N.
Paneth Eric
Yehushua Moshe
Callan Edward W.
International Mobile Machines Corporation
Jacobs Arthur A.
Safourek Benedict V.
LandOfFree
Modem for RF subscriber telephone system does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Modem for RF subscriber telephone system, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Modem for RF subscriber telephone system will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-604744