Step-Down Grouping Maximization-Likelihood Algorithms and its Application in DS-CDMA System

We focus on the maximization-likelihood algorithms and its application aimed at achieving satisfactory performance at the price of a moderate computational complexity. We propose a new algorithm named step-down grouping maximization likelihood (SGML). At the analysis stage, some interesting properties shared by the proposed procedures are proven. Finally, the performance assessment shows that the new schemes are superior to the linear detectors in DS-CDMA system, and some of them achieve a bit-error rate close to that of the optimum receiver.