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 …

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 …

Non-orthogonal multiple access (NOMA)-based cognitive radio (CR) networks have recently
emerged as a promising solution to enhance the spectral efficiency and massive …

The rapid growth of wireless communication systems around the world has led to a
significant demand for more radio spectrum resources. Radio spectrum regulators are facing …

In cognitive radio networks, each cognitive transmission process typically requires two
phases: the spectrum sensing phase and data transmission phase. In this paper, we …

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

The sensing‐throughput trade‐off and the sensing‐energy trade‐off for cooperative
spectrum sensing have been the subject of recent research. Two important, but often …

A hybrid spectrum sensing and geolocation database framework is proposed to tackle the
discovery of spatial-temporal spectrum hole in cognitive radio networks. We first analyze the …

In this letter, we study the performance of the energy detector for opportunistic spectrum
access (OSA) by a secondary user (SU) in dynamic scenarios, where a primary user (PU) …

Cognitive femtocell has emerged as one of the promising ways to solve the indoor coverage
and spectrum shortage problems in cellular networks. However, it is a challenge to motivate …