Adaptive interference cancellation with diversity combining for a DS-CDMA system in Rayleigh fading

In this work, we propose a new signal detection scheme for a DS-CDMA system in frequency flat Rayleigh fading channels. The proposed detector exploits the space diversity and the adaptive interference cancellation to mitigate the effects of both channel fading and multiple-access interference. It consists of L diversity antennas, L adaptive interference cancellers (one for each diversity branch), and a diversity combiner. The diversity combining method considered in this work is just a kind of simple selection combining. Simulation results show that for a moderate loading of the system a significant performance improvement can be achieved from using the proposed detector with diversity order of only two