With the rapid deployment of new wireless devices and applications, the last decade has
witnessed a growing demand for wireless radio spectrum. However, the fixed spectrum …

This paper provides an overview of cognitive radio (CR) networks, with focus on the recent
advances in resource allocation techniques and the CR networks architectural design. The …

Spectrum sensing is a key function of cognitive radio to prevent the harmful interference with
licensed users and identify the available spectrum for improving the spectrum's utilization …

We consider a cognitive radio network with an energy-harvesting secondary transmitter to
improve both energy efficiency and spectral efficiency. The goal of this paper is to determine …

We investigate the problem of distributed channel selection using a game-theoretic
stochastic learning solution in an opportunistic spectrum access (OSA) system where the …

Age of information (AoI) is a performance metric that measures the timeliness and freshness
of information, and is particularly relevant in applications with time-sensitive data. This paper …

Opportunistic spectrum access (OSA) has been regarded as the most promising approach to
solve the paradox between spectrum scarcity and waste. Intelligent decision making is key …

A green-energy-powered cognitive radio (CR) network is capable of liberating the wireless
access networks from spectral and energy constraints. The limitation of the spectrum is …

Energy-efficient design has become increasingly important to battery-powered wireless
devices. In this paper, we focus on the energy efficiency of a cognitive radio network, in …

Cognitive functions in wireless network nodes are beneficial for leveraging intricate trade-
offs among energy efficiency, performance and practicality. There are two fundamental but …