Cognitive radio (CR) can successfully deal with the growing demand and scarcity of the
wireless spectrum. To exploit limited spectrum efficiently, CR technology allows unlicensed …

Wireless communications have gained huge attention over the past decades because of
continuously increasing demands. The main goal of all wireless network designers is to …

The cognitive radio (CR) paradigm for designing next‐generation wireless communications
systems is becoming increasingly popular, and different aspects of it are being implemented …

Fairness means to maintain the property of equity or equivalence. It is the distribution,
sharing, allocation, and supply of different working metrics fairly such as bandwidth …

In this paper, we study resource scheduling in a relay-assisted cognitive radio network with
the orthogonal frequency division multiple access (OFDMA) scheme adopted to cope with …

In this paper, we propose an energy-efficient resource allocation scheme for the downlink of
decode-and-forward relay-assisted orthogonal frequency division multiple access systems …

In this paper, we propose a novel framework of cognitive radio assisted cooperation (CRAC)
for downlink transmissions in orthogonal frequency-division multiple access (OFDMA) …

We consider the problem of joint subchannel and power allocation for an orthogonal
frequency-division multiple-access (OFDMA)-based cognitive radio network (CRN). We …

This paper studies the rate maximization problem and designs the beamforming strategy for
relay-aided multiuser multiantenna cognitive radio (CR) network that coexists with a primary …

Opportunistic scheduling algorithms in cognitive radio networks (CRNs) allocate resources
by exploiting the variations in channel conditions and spectral activities of primary users …