A partial PIC with MRC receiver design for SCBT system over multipath fading channels

Single carrier block transmission (SCBT) system has become one of most popular modulation system due to its low peak to average power ratio (PAPR), and it is gradually considered to be used for uplink wireless communication system. And in this paper, for the uplink SCBT system, a low complexity parallel interference cancellation (PIC) with maximum ratio combining (MRC) technology is proposed to use for receiver to combat the inter-carrier interference (ICI) problem over multipath fading channel. With the aid of MRC scheme, the proposed PIC technique can effectively perform the interference cancellation and acquire the benefit of frequency diversity gain. In fact, with more taps for weighting combination, it will lead to higher frequency diversity gain. Furthermore, it indicates that the proposed technique can achieve better bit error rate (BER) performance due to the diversity gain. This can mainly be attributed to the ability of this scheme to effectively deal with interference effects and achieve inherent frequency diversity with MRC. Simulation results reveal that the proposed low complexity PIC-MRC system can provide robust performance and outperform the conventional PIC and the iterative frequency domain decision feedback equalizer (FD-DFE) systems over multipath fading channel environment.