Currently, there are several ongoing efforts for the definition of new regulation policies,
paradigms, and technologies aiming a more efficient usage of the radio spectrum. In this …

Fifth Generation (5G) networks aim at providing value-added services with advanced
performance such as low-latency communications, high reliability, high data rates and …

In the last decade, cognitive radio (CR) has emerged as a major next generation wireless
networking technology, which is the most promising candidate solution to solve the spectrum …

Due to advancements in the wireless networking technologies, a lot of new wireless services
are demanding the radio spectrum for their usage. The radio spectrum is considered as a …

Cognitive radios have been identified as a solution to the crowded spectrum issue. With the
realization of cognitive radio networks came the recognition that both new and old security …

Spectrum sensing is one of the most essential components of cognitive radio since it detects
whether the spectrum is available or not. However, spectrum sensing accuracy is often …

Cognitive radio is a promising solution for spectrum scarcities in the future. Secondary users
(SUs) adopt cooperative sensing to learn the primary user's (PU's) occupancy activity. This …

The focus of this research paper is twofold: First, we discuss some of the critical issues and
challenges currently inhibiting the realization of a cognitive radio network (CRN). Those …

Collaborative spectral sensing can fuse the perceived results of multiple cognitive users,
and thus will improve the accuracy of perceived results. However, the multi-source features …

In the 15 years since inception, extensive research has been conducted on various
proposed features associated with the cognitive radio paradigm. This paper proposes an …