| 摘要 |
<p>An orthogonal code division multiple-access communications system comprised of a plurality of transceivers respectively employing orthogonal noise code mate pairs of a type having autocorrelation functions upon detection which when linearly added together compress into a lobeless impulse and wherein the same single time slot is utilized by all of the users in the system. Each user is assigned a different unique noise code pair consisting of code mate pairs that are selected from a subset of multiplexed noise codes whose crosscorrelation function value is equal to zero at a time when all the code mate pairs compress to an impulse, i.e. .gamma. = 0. The described arrangement enables random access, or direct call-up, to be accomplished with no interference between the users while using different noise codes for each user.</p> |
