It is widely believed that the advances of networking technologies will reshape the future of
telecommunication system. The continuous growth in data traffic originated by mobile users …

The massive growth in mobile users and wireless technologies has resulted in increased
data traffic and created demand for additional radio spectrum. This growing demand for …

In cognitive networks, efficient spectrum sensing is of great importance for communication of
unlicensed secondary users (SU) without interfering with the communication of licensed …

Spectrum access policy in cognitive radio (CR) systems is classically based on a binary-
valued function, where the secondary users (SUs) can access the spectrum of a primary …

The hybrid cognitive radio (CR) system which combines the two classical interweave and
underlay approaches has an improved spectrum efficiency compared to conventional CR …

Over recent years, cognitive radio technology has been paid enormous attention as this
innovatory communication archetype can utilize existing wireless spectrum resources more …

Abstract Design of a novel triband bandpass filter is presented for wireless communications
systems. The filter is based on inter‐coupled stepped impedance resonators and inter …

In this work, two novel methodologies for the multiband spectrum sensing in cognitive radios
are implemented. Methods are based on the continuous wavelet transform (CWT) and the …

The introduction of Cognitive Radio (CR) to ensure the efficient utilization of radio spectrum
resources, where the opportunistic unlicensed user called the Secondary User (SU) jumped …

The authors propose an optimal joint power control and multi‐band spectrum sensing
scheme for cognitive radio (CR) systems to increase the spectral efficiency and to overcome …