Telecommunications – Transmitter and receiver at separate stations – Single or vestigial sideband system
Patent
1982-06-01
1985-09-03
Bookbinder, Marc E.
Telecommunications
Transmitter and receiver at separate stations
Single or vestigial sideband system
455 71, 455 72, 455109, 455116, 455203, 455265, 455266, 455260, H04B 100, H04B 116, H04B 176
Patent
active
045397074
ABSTRACT:
A compressed single side band communication system and method in which the audio signal is compressed prior to pre-emphasis and thereafter summed with a pilot tone for further compression prior to transmission. Initally, only the pilot tone is transmitted at full rated power to aid in acquisition of the signal by the receiver. Thereafter, the transmitter ALC is disabled and the pilot tone is attenuated. The receiver adjusts the frequency characteristics of the pilot tone filter and phase lock loop filter in the detector as a function of lock-on. The delay after loss of lock-on in reverting to wide band pilot tone and wideband loop filters is varied as a function of signal strength. The pilot tone may be modulated for tone coded squelch. The modulating source is located in the return end of the phase lock loop filter. A unique filter is provided to insure acquisition of the pilot tone. Automatic gain control of the audio signal is responsive to the tone signal without effecting the composite audio and tone signal.
REFERENCES:
patent: 2248757 (1941-07-01), Herold
patent: 2349870 (1944-05-01), Koch
patent: 3084328 (1963-04-01), Groeneveld et al.
patent: 3112462 (1963-11-01), De Jager et al.
patent: 3217255 (1965-11-01), Broadhead, Jr. et al.
patent: 3271681 (1966-09-01), McNair
patent: 3518566 (1970-06-01), Vogel
patent: 3667047 (1972-05-01), Iwasaki et al.
patent: 4271499 (1981-06-01), Leveque
Collette Douglas P.
Jacobs Paul H.
Aerotron, Inc.
Bookbinder Marc E.
Rogers, III L. Lawton
LandOfFree
Compressed single side band communications 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 Compressed single side band communications system and method, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Compressed single side band communications system and method will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-617798