Adaptive multiuser detection for DS-CDMA systems

In this paper, two linear adaptive multiuser detection schemes are presented. An adaptive MMSE detector and a blind adaptive multiuser detector belong to a class of suboptimal linear detection schemes. The strength of these adaptive solutions consists in very attractive trade-off between performance of the detectors and their requirements regarding knowledge of parameters of the desired user as well as other users. Relatively low computational complexity of such detection algorithms is also the benefit. In order to show a performance advantage of the adaptive detectors over a classical matched filter solution (commonly applying in exiting CDMA systems), computer simulations are carried out. They demonstrate that the adaptive linear detectors can be recognized as powerful multiuser detection tools.