H - Electricity – 04 – M
Patent
H - Electricity
04
M
344/12
H04M 3/42 (2006.01) H04J 13/00 (2006.01)
Patent
CA 1192647
ABSTRACT A switching system for performing line to line or group to group switching of communication signals modulated by multiplexed noise codes. The noise codes comprise a subclass or set of multiplexed noise codes consisting of code mate pairs which provide an impulse autocorrelation function when detected and furthermore crosscorrelate to zero at a time when the code mate pairs compress to an impulse providing thereby orthogonal operation, meaning that there is no mutual interference between any of the input/output lines when the signals are translated thereon concurrently. Plural sets of noise code generators and code selectors are coupled to predetermined ones of a plurality of sets of matched filter detectors and code selectors in accordance with a switching algorithm which sets selected code selectors to the same code mate pairs so that a specific signal applied to a predetermined input line and thereafter coupled to modulation means connected to one set of code generators is directed to a predetermined output line that is connected to a matched filter decoder pair matched to the input code.
430040
Aspila Kalevi P.
The Government Of The United States As Represented By The Secret
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