In the underlay spectrum sharing approach, cognitive radios have limited coverage area to
keep interference protection for the licensed users. Multiple cooperative relays have shown …

In underlay cognitive radio networks, imperfect channel knowledge will have an adverse
effect on the performance of both the primary users (PU) and the secondary users (SU) …

This paper studies best relay selection in a multi-cell cognitive network with amplify-and-
forward (AF) relays. We derive the analytical integral-form expression of the cumulative …

This work investigates the impact of outdated channel state information (CSI) on the outage
performance of decode-and-forward (DF) buffer-aided underlay cognitive relay networks …

Cooperative relaying combined with selection has been extensively studied in the literature
to improve the performance of interference-constrained secondary users in underlay …

Cooperative relay technology has recently been introduced into cognitive radio (CR)
networks to enhance the network capacity, scalability, and reliability of end-to-end …

This letter considers amplify-and-forward (AF) cognitive relay networks with interference
power constraint and transmit power constraint in a spectrum-sharing context. In particular …

We examine the impact of multiple primary transmitters and receivers (PU-TxRx) on the
outage performance of cognitive decode-and-forward relay networks. In such a joint …

The availability of channel state information (CSI) about the interference links from the
secondary transmitters to the primary receivers is widely assumed in the literature on …