Service-integrating, digital message transmission system for joi

Details Service-integrating, digital message transmission system for joi Service-integrating, digital message transmission system for joi

1986-12-03

1988-08-09

Griffin, Robert L.

Multiplex communications

Wide area network

Packet switching

370 3, 455606, 455608, 455617, H04B 900

Patent

active

047633263

ABSTRACT:
In future broadband-ISDN, with preferably optical fiber subscriber connecting lines, the subscriber can not only access narrow-band ISDN-services but also broadband-services (for example moving picture services). For the integration of low-rate ISDN-signals and high-rate broadband signals, at the transmitter the narrow-band and the broadband signals are additively superimposed on each other with weighting factors depending on their bit rate ratios, to derive a multi-level amplitude sum signal. At the receiver the narrow-band signal is recovered from the multi-level amplitude sum signal by amplitude envelope demodulation, and the broadband signal is recovered by amplitude limiting of such sum signal.

REFERENCES:
patent: 4328591 (1982-05-01), Baghdady
patent: 4441180 (1984-04-01), Schussler
patent: 4481621 (1984-11-01), Schmack et al.
patent: 4545048 (1985-10-01), Hauk et al.

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