This paper considers the problem of optimizing the data rate of the cooperative cognitive
system subject to the dual constraints of the interference threshold of primary users and …

In this study, a new beamforming and power allocation method for cooperative cognitive
radio (CR) networks is proposed. The proposed method can be deployed in systems with …

Cognitive radio networks with cooperative communications can effectively improve spectrum
efficiency and data rate. Under this network scenario, there are three possible transmission …

This paper considers a resource scheduling problem of a cooperative cognitive radio
network based on orthogonal frequency division multiplexing technology, in which primary …

In the underlay decode-and-forward (DaF) cooperative cognitive radio (CR) network, an
optimal relay can be selected by the conventional max-min selection on the condition of not …

A cognitive radio scenario is considered where the signals transmitted by a secondary user
(SU) are relayed by multi-antenna relays using an amplify-and-forward cooperation protocol …

In this paper we consider a decode-and-forward cooperative network, which is active in the
same bandwidth as a primary user network. The cooperative or secondary user network …

In this paper, we investigate a two‐step cooperative cognitive radio network, which consists
of two secondary links, a number of relays, and one primary link. During the first step, the …

In cognitive radio networks, secondary users (SUs) have to control their transmission power
so that the interference to primary users'(PUs) are tolerable. Under this situation, SUs will …

In this paper, we investigate joint relay selection and power allocation to maximize system
throughput with limited interference to licensed (primary) users in cognitive radio (CR) …