Orthogonal Code Division Multiple Access Communications System.
Abstract
This invention relates generally to noise code communications systems and more particularly to an orthogonal code division multiple-access (CDMA) communications system which utilizes noise code mate pairs. An orthogonal code division multiple-access communications system is 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 cross-correlation function value is equal to zero at a time when all the code mate pairs compress to an impulse. 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.
Document Details
- Document Type
- Technical Report
- Publication Date
- Aug 12, 1982
- Accession Number
- ADD009734
Entities
People
- Frank S. Gutleber
Organizations
- United States Army