Modular contiguous channel multiplexer

Details Modular contiguous channel multiplexer Modular contiguous channel multiplexer

1987-03-04

1989-03-21

Olms, Douglas W.

Multiplex communications

Wide area network

Packet switching

H04J 108

Patent

active

048150754

ABSTRACT:
This invention relates to a modular contiguous channel multiplexer having one or more modules that produce an asymmetric filter function that is combined with responses from other modules to produce an overall symmetrical response. The multiplexer can have channels arranged in any order of relative frequencies and one or more channels can be added or removed from the multiplexer without disturbing the operation of the existing or remaining channels. A method of constructing a multiplexer involves choosing the most downstream channel first, then choosing sequentially the channel immediately upstream from the channel last chosen and choosing filters of each channel to meet certain criteria. The filters of each channel are identical to one another but are not necessarily identical to filters in adjacent channels.

REFERENCES:
patent: 4029902 (1977-06-01), Bell, Jr. et al.
patent: 4258435 (1981-03-01), Levy et al.

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