Capacity enhancement in multirelay-assisted hybrid SWIPT wireless communications

In this paper, we propose an advanced multirelay-assisted hybrid (M-AH) simultaneous wireless information and power transfer (SWIPT) scheme to enhance the capacity in wireless communication systems. With the proposed scheme, the harvested energy at the relays within the same cluster can be utilized to improve the service quality of the optimal relay. Notably, the optimal relay is determined through an opportunistic relay selection approach. Moreover, we introduce a four-phase transmission strategy and develop an iterative optimization algorithm to maximize the system capacity (SC) while considering time slot and power constraints. The simulation results demonstrate that our proposed scheme outperforms existing schemes.