With years of tremendous traffic and energy consumption growth, green radio has been
valued not only for theoretical research interests but also for the operational expenditure …

Spectrum sensing is one of the essential tasks to have a cognitive radio system, which will
allow an unlicensed user, called secondary user, to utilize the spectrum while the licensed …

The incorporation of cognitive radio (CR) and energy harvesting (EH) capabilities in wireless
sensor networks enables spectrum and energy-efficient heterogeneous CR sensor networks …

Cognitive radio has been proposed as a promising technology to resolve the spectrum
scarcity problem by dynamically exploiting underutilized spectrum bands. Cognitive radio …

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 …

In this paper, we consider heterogeneous cognitive radio networks (CRNs) comprising
primary channels (PCs) with heterogeneous characteristics and secondary users (SUs) with …

In cognitive radio (CR) networks, cooperation can greatly improve the spectrum sensing
performance. However, more energies are required in the local spectrum sensing and …

Joint optimal transmission power and sensing time of energy efficient spectrum sensing for a
cognitive radio (CR) system is considered. The design problem is formulated as a function of …

Square lattice (SL), triangle lattice (TL), and hexagon lattice (HL) are widely used regular
deployment patterns for industrial Internet of Things (IoT). However, the performance of …

Cooperative spectrum sensing (CSS) has been proposed to improve the reliability of
decisions made about the presence of primary users in cognitive radio networks. However …