In this paper, we propose and evaluate the behavior of a new cognitive amplify-and-forward
relaying scenario where the multiple primary users utilize orthogonal spectrum bands. Using …

In this paper, to guarantee the reliable communications of the primary user (PU), we impose
a joint constraints on both average and peak interference power. With multiple relays …

In this paper, the performance of dual-hop decode-and-forward (DF) cognitive relay
networks over independent non-identically distributed (inid) Weibull fading channels are …

In this paper, we study a multiple-antenna two-way relaying (TWR) cognitive radio (CR)
system. A space alignment (SA) technique is adopted by the secondary users (SUs) to avoid …

In this work, the system performance of a cognitive multi-relay amplify-and-forward network
is investigated in the presence of imperfect channel estimations. In the proposed structure …

In this paper, we investigate and evaluate the performance of incremental relaying and relay
selection, when used in the context of cognitive radio networks. Assuming that a number of …

The performance of cognitive spectrum sharing systems with opportunistic relay selection
over Nakagami-m fading is analyzed in the presence of multiple primary users (PUs). In …

With most of the radio spectrum already allocated, cognitive radio acts as a promising
solution to the spectrum scarcity problem. Increasing the secondary throughput without …

Spectrum sharing in cognitive radio network helps to improve the spectrum utilization. In
underlay spectrum sharing model, the secondary users (SU) are allowed to share the …

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 …