Underlay cognitive networks should follow strict interference thresholds to operate in parallel
with primary networks. This constraint limits their transmission power and eventually the …

In this paper, the impact of co-channel interference (CCI) on the performance of an underlay
cognitive radio (CR) network over Nakagami-m fading channels is presented and analyzed …

The impact of an imperfect channel estimation on the amplify-and-forward (AF) mode
cooperative communications systems is studied, with some important factors, including the …

In this study, the author investigates the outage performance of cognitive relay networks, in
which the best relay is selected based on full and partial channel state information …

The performance of underlay cognitive relay networks with multiple primary users and
multiple proactive decode-and-forward relays is investigated. Particularly, both interference …

A relay-aided cooperative underlay cognitive radio system with an interference constraint at
the primary receiver (PR) is considered. When the primary user (PU) is active, those …

This paper introduces a new spectrum sharing constraint which facilitates outage analysis
for the cognitive relay networks with multiple primary receivers (PR) s and under outdated …

In this study, we investigate the outage capacity of a cooperative relaying based cognitive
radio network in slow fading channel. Our network scenario consists of a primary transmitter …

In this paper, we propose an underlay two‐way relaying scheme with the successive
interference cancellation (SIC) solution in which two secondary sources transmit …

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 …