H - Electricity – 04 – J
Patent
H - Electricity
04
J
363/11
H04J 3/00 (2006.01) H04B 7/216 (2006.01) H04J 13/02 (2006.01) H04K 1/02 (2006.01) H04L 9/18 (2006.01) H04J 13/00 (2006.01)
Patent
CA 1046669
ABSTRACT OF THE DISCLOSURE A transmission system is described, suitable for transmitting multiple messages over a single carrier. At the transmitter, a message- modulated carrier is given an additional modulation by an identifiable signal. At the receiver, the carrier is identified by means of the additional modulation with messages being retrieved by demodulating the modulated carriers. The system is characterized in that, in the transmitter the carrier for each message is given an additional modulation causing a number of sub-carriers to be generated. The sub-carriers are synchronized in code and carrier frequency both mutually and jointly. The carrier is solely modulated by an identifiable signal. The carrier and sub-carriers are then added to from the transmitted carrier.
221820
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