Two-way CATV system using frequency division multiplexing

Details Two-way CATV system using frequency division multiplexing Two-way CATV system using frequency division multiplexing

1989-05-18

1990-05-22

Olms, Douglas W.

Multiplex communications

Wide area network

Packet switching

370 70, 358142, H04J 400

Patent

active

049282727

ABSTRACT:
A two-way CATV system, in which a plurality of communication channels are set simultaneously in an upstream communication line between a plurality of end terminal equipment and a center equipment by using frequency division multiplexing, is disclosed. A digital transmultiplexer is arranged at each junction between a trunk line and a branch line for converting a frequency division multiplex signal into a time division multiplex signal. Frequency division multiplex signals from the terminal equipment are converted into time division multiplex signals, and then only a time slot corresponding to a frequency slot containing a signal therein is picked up to thereby prevent upstream noises from flowing into the trunk line.

REFERENCES:
patent: 4013842 (1977-03-01), Kao et al.
patent: 4075429 (1978-02-01), Takahata et al.
patent: 4513315 (1985-04-01), Dekker et al.

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