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, secondary users can be coordinated to perform spectrum
sensing so as to detect primary user activities more accurately. However, more sensing …

Spectrum sensing is an important aspect of cognitive radio networks (CRNs). Secondary
users (SUs) should periodically sense the channels to ensure primary-user (PU) protection …

User cooperation for spectrum sensing in cognitive radios has been proposed in order to
improve the overall performance by mitigating multi-path fading and shadowing experienced …

Green cognitive radios show promise for high energy efficiency (EE) in the future of wireless
communications. Spectrum sensing refers to an energy-consuming procedure that allows …

In this paper, we formulate the energy-efficient cooperative sensing scheduling scheme for a
cognitive radio network (CRN) with heterogeneous primary signal-to-noise ratio at each …

In this paper, we address energy efficient (EE) cooperative spectrum sensing policies for
large scale heterogeneous cognitive radio networks (CRNs) which consist of multiple …

A promising technology that tackles the conflict between spectrum scarcity and
underutilization is cognitive radio (CR), of which spectrum sensing is one of the most …

Cooperative spectrum sensing (CSS) that utilizes multi-user diversity to mitigate channel
instability and noise uncertainty is a promising technique in cognitive radio networks …

Cooperative spectrum sensing, which provides an effective approach to improve the sensing
performance and better exploit the spectrum opportunities, is an important technology to …