Multihop relaying is an efficient strategy to improve the connectivity and extend the coverage
area of secondary networks in underlay cognitive systems. In this work, we provide a …

In this paper, the performance of a dual-hop multiuser underlay cognitive network is
thoroughly investigated by using a decode-and-forward (DF) protocol at the relay node and …

In this paper, we analyze the performance of cognitive multi-hop networks employing the two
most common cooperation protocols, decode-and-forward (DF) and amplify-and-forward …

In this paper, the system capacity of multihop Decode-and-Forward (DF) relaying networks
under adaptive transmission techniques is studied over Rician fading channels. In particular …

In this paper, we consider a multi-hop transmission using cooperative communication in
cognitive underlay networks. Relying on the broadcast characteristic of wireless medium, the …

In this paper, the authors consider an underlay multi‐hop cognitive radio network with
energy harvesting secondary nodes, where there is a cluster of secondary decode‐and …

Cognitive radio allows secondary users to use the same existing frequency spectrum band
as primary users. This co-existence has several impacts on the whole network. This has …

The performance of cognitive networks (CNs) has been significantly improved by deploying
a third-party, namely relay, to assist the direct communication. However, under a limited …

The nature of cognitive radio is based on the co-existence of secondary users in the area of
primary users. Co-channel interference (CCI), therefore, is a vulnerable phenomenon in …

Relaying transmission enables the high performance of wireless communication systems.
Therefore, many researches have investigated this technique. However, most of the studies …