Outage analysis of two‐way relaying in SWIPT‐enabled CCRN with co‐channel interference

Abstract

SummaryThis work investigates the dual impacts of co‐channel interference (CCI) on radio frequency (RF) energy harvesting (EH)‐enabled cooperative cognitive radio network (CCRN). CCRN is considered to be worked following overlay mode of spectrum sharing technique. One pair of cellular nodes are considered as primary users (PUs), and a pair of Internet‐of‐Things devices (IoDs) are considered as secondary users (SUs) of CCRN. IoDs are used to help the communication between cellular node and in benefit of that the devices can access the cellular spectrum. In one hand, the effect of CCI from different sources may deteriorate the received signal‐to‐noise ratio (SNR) at IoDs, and on the other hand, scavenge of energy at IoDs from RF signal of CCI may improve the transmission of information from IoDs. Hybrid power time switching (HPTS) technique is adopted in the proposed model for harvesting energy from RF signals at IoDs following simultaneous wireless information and power transfer (SWIPT) principle. The closed form expressions of both PU and SU outage are derived to analyse the performance of two different networks. The joint effects of both power splitting and time switching factors on both PU and SU outage are shown in simulation results. The outage performances of both PU and SU networks with respect to different interference‐to‐noise (INR) level and transmission power are also shown in the results. The performance of the proposed system is found as better than the previous work on similar network architecture.