User capacity for synchronous multirate CDMA systems with linear MMSE receivers
Yingwei Yao, H. Vincent Poor, Feng‐Wen Sun · IEEE Transactions on Information Theory · 2004
The performance of linear minimum mean-square error (MMSE) multiuser receivers in a dual-rate synchronous direct-sequence code-division multiple-access (DS-CDMA) system is investigated using the random spreading sequence analysis. Multicode (MC) systems and different variants of variable spreading length (VSL) systems are studied. User capacity regions are obtained for these systems.