Multiplexed Noise Coded Switching System.
DEPARTMENT OF THE ARMY WASHINGTON DC
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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 inputoutput 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.
- Non-Radio Communications