Combinatory　Spread－Spectrum　Multiple－Access　Based　on　Residue　Number　System：System　and　Performance

ＣｏｍｂｉｎａｔｏｒｙＳｐｒｅａｄ－ＳｐｅｃｔｒｕｍＭｕｌｔｉｐｌｅ－ＡｃｃｅｓｓＢａｓｅｄｏｎＲｅｓｉｄｕｅＮｕｍｂｅｒＳｙｓｔｅｍ：ＳｙｓｔｅｍａｎｄＰｅｒｆｏｒｍａｎｃｅＹａｎｇＬｉｅｌｉａｎｇ；ＬｉＣｈｅｎｇｓｈｕ（ＮｏｒｔｈｅｒｎＪｉａｏｔ...

A combinatory direct-sequence based on residue number system(RNS),spread spectrum multiple-access communication system model is presented.Under this communication environment,each user is assigned a set of(when i≠j,gcd(mi,mj)-1)othogonal sequences;Each receiver has correlators used for despread,log2 information bits can be transmitted in a symbol period.We obtain approximations for the multiuser probability of error when the channel noise is a combination of additive white Gaussian noise(AWGN)and multiple-access interference.In section4,we compare the performance such as transmission capability,system structure,and the probability of error with the system proposed by P.K.Enge.