Modulation and demodulation system employing AM-PSK and FSK for

Details Modulation and demodulation system employing AM-PSK and FSK for Modulation and demodulation system employing AM-PSK and FSK for

1989-02-28

1992-02-11

Safourek, Benedict V.

Pulse or digital communications

Repeaters

Testing

375 42, H04L 2534, H04L 2549

Patent

active

050881116

ABSTRACT:
A communication network having a first broadband communications channel or transmitting bus and a second broadband communications channel or receiving bus, wherein the first broadband communications channel is for passing information upstream to a head end and the second broadband communications channel is for passing information downstream from the head end to remote nodes. All nodes of the system are coupled to both the first communications channel and the second communications channel. According to the invention, modulation of signals applied to the first communication channel is optimized for burst communication from a plurality of sources to central control at the head end, and modulation applied to the second communications channel is optimized for continuous communication from the central source to a target node.

REFERENCES:
patent: 4020289 (1977-04-01), Anderson
patent: 4210779 (1980-07-01), Simokat
patent: 4313205 (1982-01-01), Rhodes
patent: 4425666 (1984-01-01), Groth, Jr.
patent: 4426710 (1984-01-01), Pommier
patent: 4498169 (1985-02-01), Rozmus
patent: 4520492 (1985-05-01), Weber
patent: 4574284 (1986-03-01), Feldman et al.
patent: 4686490 (1987-08-01), Cressey
patent: 4712240 (1987-12-01), Schnerk

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