Performance analysis of two‐way wireless‐powered Amplify‐and‐Forward relaying in the presence of co‐channel interference

• Published in: International journal of communication systems 2021-01, Vol.34 (1), p.n/a
• Main Authors: Soleimani‐Nasab, Ehsan, Javadi, Sepideh
• Format: Article
• Language: English
• Subjects: Amplification; amplify‐and‐forward, co‐channel interference, energy harvesting, power transfer, two‐way relaying; Energy harvesting; Interference; Monte Carlo simulation; Performance assessment; Relay; Relaying; Transmitters
• ISSN: 1074-5351; 1099-1131
• DOI: 10.1002/dac.4644

Summary In this paper, we investigate the performance assessment of a bidirectional relaying system using energy harvesting techniques. We assume independent and nonidentically distributed (i.n.i.d.) Nakagami‐m fading channels where the amplify‐and‐forward relay is subject to co‐channel interference (CCI) due to transmissions of other transmitters. Two different scenarios, namely, scenario I and scenario II are evaluated. In scenario I, both end‐sources provide the required energy for the relay, whereas the relay also harvests energy from the co‐channel interferes. Then, in the first phase of cooperation, both end‐sources send the information to the relay, and after amplifying the received signal, relay transfers information to the appropriate destination in the second time‐slot. In the scenario II, both end‐sources harvest energy from the relay. After that, the information cooperative transmission is done similar to the first scenario. For both considered scenarios, tight closed‐form expressions of outage probability, symbol error probability, ergodic capacity, and throughput are obtained at arbitrary signal‐to‐noise‐ratios (SNRs). To get more insights, simplified high SNR results for both scenarios are also deduced where the diversity orders are obtained. Monte Carlo simulation results are presented to validate the correctness of our proposed analysis. Our results explicitly demonstrate that the first scenario has a better performance than the second one in the medium and high SNR region, whereas the second scenario outperforms the first one in the low SNR regime. The performance analysis of a wireless‐powered bidirectional relaying system, deriving tight closed‐form along with asymptotic expressions of outage probability, symbol error probability, ergodic capacity, and throughput. The first scenario has a better performance than the second one in the medium and high SNR region, whereas the second scenario outperforms the first one in the low SNR regime.