H - Electricity – 04 – J
Patent
H - Electricity
04
J
363/1
H04J 3/12 (2006.01) H04J 3/07 (2006.01)
Patent
CA 1055170
A DIGITAL TIME-DIVISION MULTIPLEXING SYSTEM by Alvin L. Pachynski, Jr. ABSTRACT OF THE DISCLOSURE Disclosed is a digital multiplexer which combines N parallel bit-synchronized digital signals, each of bit rate f1, into a single composite line signal of bit rate f2, where f2 > Nf1. Before the individual bits are interleaved, each digital signal is converted to a submultiple of the line frequency, f2. By inserting gaps having a predetermined duration and occurring at a fixed rate into each of the N digital signals, the bit rate f1 of each bit stream is increased to f2/N. This is done without sampling any bit more than once. A multiplexer sequentially interleaves each bit from the N converted bit streams along with the gaps in each bit stream, forming the composite signal of bit rate f2. The interleaved gaps form empty time slots in the composite signal into which one or more signaling bits are added. Some of the added signaling bits carry framing information to lock the transmitter and receiver together. Thus, a composite higher-rate digital line signal consisting of interleaved information bits and signaling bits forms the time-division multiplex signal suitable for transmission over a single digital transmission path.
253085
Gte Automatic Electric Laboratories Incorporated
Na
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