Partial parallel interference cancellation and its modified adaptive implementation for MC-CDMA system

Partial parallel interference cancellation (PPIC) and its adaptive implementation are investigated in this paper. The concept and methodology of the adaptive PPIC implementation is borrowed from the DS-CDMA context. A modification for the adaptive version is also proposed which leads to less complexity and better performance. Different scenarios have been considered to fully investigate the performance in a range of system loading with different combinations of convolutional coding, turbo coding and constellation. The performance is provided in terms of BER, FER, number of active users and in the presence of a multipath fading channel. It is also compared with the performance of the equal gain combining (EGC) detector. In the low to moderate loading the PPIC achieves a good performance. High order modulations, on the other hand, deteriorate its performance.