Interference Cancellation/Decoding for Coded Synchronous Multi-carrier DS-CDMA

Abstract

In this paper, by applying Turbo principle to convolutionally coded synchronous multi-carrier DS-CDMA, we propose Turbo parallel interference cancellation and decoding, which is termed Turbo PIC/decoding. We make analysis and simulations for Turbo PIC/decoding by the computer. The simulation results show that Turbo PIC/decoding acquires better performance with a posteriori log-likelihood rate (LLR) feedback than with a priori LLR feedback and outperforms the conventional PIC/decoding in performance significantly. Besides, Turbo PIC/ decoding with a posteriori LLR feedback has a lower complexity than that with a priori LLR feedback, which indicates that Turbo PIC/decoding with a posteriori LLR feedback is more favorable for future application because of its better performance and relatively lower implementation complexity.