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:
Jan. 20, 1998
Filed:
Nov. 14, 1995
Tomoyuki Ueno, Kawasaki, JP;
Fujitsu Limited, Kanagawa, JP;
Abstract
A multichannel communication system has a transmitter for frequency-division-multiplexing and transmitting signals in a plurality of channels, and a receiver for selectively receiving the signal in one of the channels. The multichannel communication system prevents additional information from being interrupted in reception due to a channel change, for thereby reliably transmitting such additional information. The transmitter has a control information multiplexing unit for time-division-multiplexing main information in each of the channels with control information common to the channels at the same timing, and a transmitting unit for frequency-division-multiplexing and transmitting the main information in each of the channels which has been time-division-multiplexed with the control information by the control information multiplexing unit. The receiver has an inhibit signal generating unit for generating a channel change inhibit signal in timed relationship to the multiplexing of the control information, and an extracting unit extracting unit responsive to a channel change signal indicative of one of the channels to be received, for extracting the signal in the channel which is indicated by the channel change signal from frequency-division-multiplexed signals transmitted from the transmitting unit if a channel change inhibit signal is not transmitted from the inhibit signal generating means.