Performance evaluation of energy harvesting-enabled NOMA under imperfect [formula omitted] shadowed fading channel information and hardware impairment

Abstract

Energy harvesting (EH)-enabled nonorthogonal multiple access (NOMA) is one of wireless communication technologies which has superiority of energy and spectral efficiencies. Nevertheless, EH-enabled NOMA is affected by multifarious practical factors including EH nonlinearity, channel impairments (fading, shadowing, path loss), and more especially, imperfect channel information and hardware impairment. Consequently, the paper evaluates swiftly its performance accounting for these factors by proposing explicit computational expressions for system throughput, energy efficiency, and outage probability. The findings reveal that system performance is significantly mitigated by these factors. Notwithstanding, it is improved, optimized, complete outage-avoided by selecting appropriate parameters. Furthermore, the findings indicate the advantage of NOMA to the conventional orthogonal multiple access.