In this paper, we investigate the achievable energy efficiency of cognitive radio networks
where two main modes are of interest, namely, spectrum sharing (known as underlay …

This paper explores joint power allocation and route selection in a multihop cognitive radio
network consisting of secondary transmitter and receiver connected through decode-and …

In this paper, we discuss the joint improvement of the energy efficiency (EE) and the
spectrum efficiency (SE) in OFDM-based cognitive radio (CR) networks. A multi-objective …

This paper investigates an energy-efficient transmission scheme in cognitive radio networks,
where primary users (PUs) may reoccupy the spectrum when secondary users (SUs) is …

In this paper, we consider a spectrum-sharing cognitive radio network where a bi-directional
secondary network is allowed to access the spectrum allocated to a primary user (PU) on …

In this paper, we present a novel power allocation scheme for multicarrier cognitive radio
networks. The proposed scheme performs subchannel power allocation by incorporating …

Maximisation of the sum‐rate of secondary users (SUs), equipped with multi‐antenna
transmitters and receivers, is considered in the context of multi‐input–multi‐output antenna …

In this paper, we develop and analyze a novel performance metric, called interference
efficiency, which shows the number of transmitted bits per unit of interference energy …

A decentralized network of cognitive and noncognitive transmitters where each transmitter
aims at maximizing his energy efficiency is considered. The cognitive transmitters are …

In this paper, we focus on energy efficiency in cognitive radio networks (CRNs). This is
formally stated as the problem of maximizing the energy efficiency (defined as the ratio of the …