Modified vestigial side band transmission system

Details Modified vestigial side band transmission system Modified vestigial side band transmission system

1980-01-25

1982-01-19

Stewart, David L.

Multiplex communications

Wide area network

Packet switching

370 72, 455204, H04J 106, H04J 112, H04J 118

Patent

active

043120644

ABSTRACT:
A communication transmission system includes one or more modulated carrier communication channels in which a receiver has a modified vestigial side band filter for eliminating phase cancellation. Accurate design of the modified vestigial side band filters at the receivers, further reduces susceptibility to frequency drift caused by component aging and component response to environmental changes. The system has particular utility in multiple channel carrier telephone communication systems which utilize limited available band width for providing a maximum number of communication channels over an extended length communication line.

REFERENCES:
patent: 2181499 (1939-11-01), Wheeler
patent: 2247898 (1941-07-01), Wheeler
patent: 2717956 (1955-09-01), Egun
patent: 3466548 (1969-09-01), Roy
patent: 3794938 (1974-02-01), Boelter
patent: 4029902 (1977-06-01), Bell
patent: 4130733 (1978-12-01), Ashford
patent: 4159454 (1979-06-01), Willmore

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