Telecommunications – Transmitter and receiver at separate stations – Suppressed carrier wave system
Patent
1984-05-18
1988-02-16
Safourek, Benedict V.
Telecommunications
Transmitter and receiver at separate stations
Suppressed carrier wave system
455 47, 455 71, 455202, 375 50, 375 61, 375 77, 375 97, 329 50, H04B 700
Patent
active
047260696
ABSTRACT:
An improved system and method for modulation, demodulation and signal processing for single sideband communications systems which provides correction for the adverse effects of rapid fading characteristics in a mobile environment. The system provides modulation through a modified Weaver modulator in which the audio input is processed to produce an output in the form of an upper sideband having a pilot tone in a spectral gap at approximately midband. The receiver includes a modified Weaver demodulator and a correction signal generating circuit which processes the received faded audio input and pilot tone to produce a correcting signal. The correcting signal is mixed with the received signal to regenerate unfaded versions of both the signal and pilot by removing random amplitude and phase modulations imposed on them by the fading.
REFERENCES:
patent: 3271681 (1966-09-01), McNair
patent: 3271682 (1966-09-01), Bucher, Jr.
patent: 3611144 (1971-10-01), Harmon, Jr. et al.
patent: 3792364 (1974-02-01), Ananias
patent: 4313211 (1982-01-01), Leland
patent: 4328590 (1982-05-01), Lee
O'Reilly David
Safourek Benedict V.
LandOfFree
A muiti-mode modulation and demodulation system and method does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with A muiti-mode modulation and demodulation system and method, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and A muiti-mode modulation and demodulation system and method will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2225925