Wireless-powered relaying SIMO-UWOC/MISO-RF networks with residual hardware impairments

Due to the non-ideal characteristics of the transceivers, there always exists some residual hardware impairments (RHIs) in practical communication systems, which could lead to degraded system performance. Therefore, in this study, we investigate wireless-powered relaying assisted underwater wireless optical communication-radio frequency systems in the context of RHIs. Specifically, considering the scenario that a multi-aperture and multi-antenna relay employs both a selection combining and a transmit antenna selection schemes to process the received and transmitted signals, we first obtain both the probability density function and cumulative distribution function of the instantaneous signal-to-interference-plus-noise ratio of the first link with RHIs. Next, utilizing those expressions as well as the Meijer's-G and Fox's-H functions, the analytical and asymptotic expressions of outage probability as well as analytical average bit error rate expressions are obtained. In addition, Monte-Carlo simulations are performed to check the accuracy of those obtained expressions.