… in the presence of multiple primary users (PUs). The secondary user (SU) network is
composed by one source node, N decode-and-forward (DF) relays, and one destination. A best …

… is proposed for a two-hop decode and forward cognitive relay network. Based on the joint …
the primary user (PU), the closed-form solution for optimal power allocation and relay selection …

… the radio spectrum access and efficiency [4] by allowing secondary users (SUs) to access
spectrum portions initially allocated to a primary user (PU); as long as defined power and/or …

… outage performance of partial AF relay selection in cognitive relay networks. We derive an
… In the relay selection, we adopt the partial AF relay selection protocol. The relay, having the …

… , focusing on relay selection is addressed. We consider a challenging scenario which takes
user mobility into consideration. Based on user mobility pattern, a dynamic relay selection …

… relaying selection is not common in cognitive two-way relay … that consider the case of single
relay networks. In this paper, … the best relay is selected by the opportunistic relaying selection …

… network and no dedicated feedback channel is available from a primary user to a
secondary user, resulting in that the instantaneous channel gains of PUs is unavailable …

… The secondary nodes share the spectrum with a licensed primary user (PU), and each node
… We propose joint relay selection and optimal power allocation among the secondary user (…

… interferences to the primary users (PUs), in this paper, we take secondary users (SUs) as …
cooperative relay selection, in which the PUs actively select appropriate SUs as relay nodes …

… in which selected secondary users assist (relay) the primary network in order to utilize the
licensed spectrum and the remained secondary users … ones, cognitive radio users (denoted as …