Multi-Feedback Successive Interference Cancellation with Dynamic Log-Likelihood-Ratio Based Reliability Ordering

In this paper, we propose a successive interference cancellation (SIC) detector which utilises multiple feedback (MF) candidates for cancellation stages and a dynamic log-likelihoodratio (LLR)-based dynamic reliability ordering (RO) of the cancellation stages in a multiple-input multiple-output (MIMO) system. The proposed multi-feedback reliability-ordered SIC (MF-RO-SIC) detector’s performance is compared with VBLAST based techniques for MF, the dynamic LLR RO without MF and the maximum likelihood (ML) detector. The results show that the MF-RO-SIC can outperform the MF-SIC and the RO-SIC in bit error rate (BER) performance, with the ability to tune the performance by altering the shadowing criterion values.