The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 21, 1985
Filed:
Apr. 21, 1983
Douglas S Friedrich, Benfleet, GB;
Marconi Avionics Limited, Rochester, GB;
Abstract
A communication system enables a plurality of wide band signals to be carried over a common signal path. Each one of the information channels is used to amplitude modulate selected half-cycles of a common carrier signal. Because successive half-cycles of the carrier signal contain information relating to only one of the information channels any non-linearities in the transmission system do not introduce intermodulation distortions. Successive half-cycles of a carrier signal 5 are routed to separate amplifiers 15, 16, 17 and 18, and the gain of each amplifier is controlled by the signal amplitude of respective information channels 1, 2, 3 and 4. The various half-cycles are then combined at a combiner 21 to re-form the carrier signal which is transmitted over a signal path to a receiver. One of the channels is provided with an identity marker to enable the information channels to be correctly separated and identified at the receiver. By increasing the frequency of the common carrier signal a large number of separate information channels can be carried without requiring the use of a transmission path having an excessively wide bandwidth.