In cognitive radio systems, secondary users can share the spectrum with the primary user as
long as the quality of service (QoS) of the primary system is guaranteed. However, the …

In this letter, we propose full-rate cooperative spectrum sharing protocol for bandwidth
efficient cognitive networks. Cooperative communication is a newly emerging protocol for …

In this correspondence, an adaptive cooperation diversity scheme with best-relay selection
is proposed for multiple-relay cognitive radio networks to improve the performance of …

A quadrature signaling based two-phase cooperation framework for cooperative cognitive
radio networking is proposed. By leveraging the degrees of freedom provided by orthogonal …

Cooperative sharing of spectrum among one primary user (PU) and multiple secondary
users (SUs) helps to enhance the throughput of the whole system. In this paper, we propose …

Recent studies demonstrated that dynamic spectrum access can improve spectrum
utilization significantly by allowing secondary unlicensed users to dynamically share the …

In this paper, we illustrate the benefits of cooperation in cognitive radio. Cognitive
(unlicensed) users need to continuously monitor spectrum for the presence of primary …

In cognitive radio networks, secondary users (SUs) opportunistically exploit the spectrum
unutilized by primary users (PUs). In this paper, we study the secondary communication …

Opportunistic spectrum access, popularly known as cognitive radio technology is an
innovative radio design philosophy which aims to increase spectrum utilization by exploiting …

In underlay cognitive radio networks, unlicensed secondary users are allowed to share the
spectrum with licensed primary users when the interference induced on the primary …