Energy efficiency (EE) is very crucial for future wireless communication systems, especially
for cognitive radio networks (CRNs). The EE performance relies on channel state …

We consider a cognitive radio network, where primary users (PUs) share their spectrum with
energy harvesting (EH) enabled secondary users (SUs), conditioned on a limited SUs' …

Energy efficiency (EE) is very crucial for future green wireless communication systems,
particularly for cognitive radio networks (CRNs). However, the EE design for CRNs in fast …

The newly emerging energy-harvesting cognitive radio networks (EH-CRNs) have drawn
significant research interests in the fields of spectrum reuse and lifetime prolongation. This …

We investigate the problem of power allocation to secondary users (SUs) in underlay
cognitive radio networks (CRNs), where the channel state information (CSI) pertaining to the …

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 …

We investigate the energy efficiency (EE) in cognitive radio networks, where cognitive users
are allowed to access a licensed frequency band opportunistically, provided that the …

We study the feasibility of the total power minimization problem subject to power budget and
Signal-to-Interference-plus-Noise Ratio (SINR) constraints in cognitive radio networks. As …

Cognitive radio (CR) and energy-efficient design have emerged as two promising
techniques to achieve high spectrum efficiency (SE) and energy efficiency (EE), respectively …

In this paper, we investigate the energy-efficient resource allocation in orthogonal frequency
division multiplexing (OFDM)-based cognitive radio (CR) networks, where we try to …