Genetic Algorithm based multiuser detection in multi-carrier DS-CDMA system

Recently, mobile communication system has been required to provide quality of service and multimedia service. Since the radio frequency spectrum is a precious resource, wireless radio networks need to make efficient use of it by providing high capacity for the system of interest. Time-domain and Frequency-domain spread MC DS-CDMA (TF-domain spread MC DS-CDMA) is a capacity improvement transmission scheme. The advantage of this scheme is that it can support more users without using long spreading codes. Multiuser Detection (MUD) is a kind of technology that can eliminate multiple access interference and increase system capacity. In this paper, we use Genetic Algorithm to reduce computational complexity of optimum detector and apply it to TF-domain spread MC DS-CDMA to eliminate multiple access interference in order for system to support more users with better performance.