H - Electricity – 04 – J
Patent
H - Electricity
04
J
363/27
H04J 1/12 (2006.01) H04J 13/00 (2006.01) H04L 1/04 (2006.01)
Patent
CA 1127781
Abstract of the Disclosure A time division multiple access mobile communications system employ- ing frequency division multiplexing and perfect noise codes to enable utiliza- tion of the system. A central node, or repeater, is employed, with all trans- missions to it being performed at a first frequency, and with the frequency division multiplexing being such that all re-transmissions from the central rode are performed at a second, different frequency. The noise codes employed are of a type termed code mates having correlation functions which upon detec- tion provide an impulse autocorrelation function. The described arrangement enables random access, or direct call-up, to be accomplished with total non- interference between users. Large improvements in signal-to-noise power ratio and in signal-to-jamming power ratio will be seen to result.
332742
Aspila Kalevi P.
The Government Of The United States As Represented By The Secret
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