… networks is studied; 2) the impacts of the interference on the primary user and the self-interference
during the relay selection process of DF-based underlay cognitive radio networks are …

… for two benchmark communications schemes in cognitive radio networks, namely direct
transmission and dual-hop communications with partial relay selection. Various results show …

… to fulfill the increasing demands of radio spectrum by 5G-and-B5G wireless systems. It is
a usual practice in underlay cognitive radio networks to take assistance from intermediate …

… The partial relay selection strategy, which chooses the relay with the largest SNR from the
… , “Proposed relay selection scheme for physical layer security in cognitive radio networks,” …

… sharing cognitive radio network, where the primary system leases its radio spectrum to the
secondary system for a fraction of time in exchange for secondary users served as relays to …

… Relative to [35]-[40] wherein the SOP for the cooperative systems with multiple relays over
… with three different relay selection schemes in the underlay cognitive radio systems experi…

… Differing from [19] and [20] which only considered physical layer security in non-cognitive
radio systems, we examine the secrecy transmission in cognitive radio systems. Additionally, …

… 1, we consider a cognitive radio network, where multiple cognitive relays (CRs) are
available to assist a cognitive source (CS) for both the spectrum sensing and data transmission …

… cognitive radio system with the secondary users and primary users in which the partial and
opportunistic relay selection … hybrid CR scheme and relay selection techniques. Specifically, …

… A cognitive radio technology has been recently proposed to resolve this contrast [2]. The
philosophy behind this technology is the co-existence of secondary users (SUs) and PUs on the …