Telecommunications – Transmitter and receiver at separate stations – Single or vestigial sideband system
Patent
1984-08-16
1986-11-11
Ng, Jin F.
Telecommunications
Transmitter and receiver at separate stations
Single or vestigial sideband system
455109, 332 45, H04B 168
Patent
active
046226940
ABSTRACT:
A system for transmitting television signals on a radio link. The system includes a transmitter having a modulator for modulating a carrier signal to produce a vestigial sideband amplitude modulated signal for transmission. The modulator includes a first converter for converting the frequency of video signals to an intermediate frequency and a second converter for converting the intermediate frequency of the video signals to a radio frequency. The system further includes a receiver having a demodulator for demodulating a received vestigial sideband amplitude modulated signal. The modulator includes a Nyquist filter connected between the first and second converters, and the demodulator includes a filter having a rectangular characteristic for processing the signal to be demodulated.
REFERENCES:
patent: 3675131 (1972-07-01), Pickholtz
patent: 3921073 (1975-11-01), Pexa
patent: 4183054 (1980-01-01), Patisaul et al.
B. Fisk and C. L. Spencer, a publication from the Proceedings of the IRE entitled "Synthesizer Stabilized Single-Sideband Systems", Dec., 1956, pp. 1680-1685.
Anzac catalogue, 1982, p. 96.
W. von Guttenberg and E. Kugler, "Modulation of Television Signals for Joint Transmission of Telephone and Television over Cables", 1964, pp. 325-331.
John P. Costas, "Synchronous Communications", Proc. IRE 44 1956, pp. 1713-1718.
Lier Hans-Peter
Weber Herbert
ANT Nachrichtentechnik GmbH
Ng Jin F.
Telesz Jr. Andrew J.
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