Reconfigurable Intelligent Surfaces (RISs) comprised of tunable unit elements have been
recently considered in indoor communication environments for focusing signal reflections to …

In this paper, we propose a joint channel allocation and power control algorithm by using
cognitive radio non-orthogonal multiple access (CR-NOMA) for femtocell users (FUs). The …

The optimal spectrum access strategy is investigated for multi-user multi-channel scenario in
cognitive radio networks. At first, an online learning method based on Dirichlet Process is …

Over the past decade, many research studies have contributed to making indoor localization
of Wi-Fi devices accurate and practically useful for emerging applications wherein GPS …

It is crucial to estimate the location of primary users (PUs) for the development of cognitive
radio networks (CRNs). Great efforts have been made in the past to develop localization …

In Cognitive Radio (CR) systems, the spectrum handoff is a key-factor as it could affect
propagation path nature. Accordingly, it may affect the overall system coverage and …

Cognitive radio-enabled heterogeneous networks are an emerging technology to address
the exponential increase of mobile traffic demand in the next-generation mobile …

Lately, the heterogeneous deployment of ultra-dense small cells such as femtocells in the
coverage region of conventional macrocells, which is referred to as ultra-dense networks …

Simulation of end-users' movement is an essential part of wireless network models that may
highly affect conclusions derived from conducted experiments. This paper presents most …

A cognitive femtocell network is considered as a highly promising solution to tackle
communications in indoor environments. Currently, the spectrum allocated in the femtocells …