Radio spectrum is the backbone for wireless communication. Many recent studies show that
most of the available spectrum has already been allocated. Cognitive radio (CR) provides a …

Cognitive radio (CR) is a promising wireless technology that provides efficient spectral
usage. Medium Access Control (MAC) has an important role in several cognitive radio …

In this paper, we consider a wideband cognitive radio network (CRN) containing a single
secondary user (SU) which can only serially sense multiple narrowband channels and thus …

In this paper, we propose a hybrid cognitive radio (CR) system where underlay and overlay
CR approaches are combined under SIRN constraints. This new access type allows to …

Media access control (MAC) protocol plays a very important role in cognitive radio networks
(CRN) because it is responsible for decision making on whether to access or not to access …

With the increase in user demand for internet access on move, spectrum resource seems to
deplete and leads to spectrum crunch. Recent researches reports that this spectrum crunch …

A cognitive radio (CR) is a radio that can change its transmission parameters based on the
perceived availability of the spectrum bands in its operating environment. CRs support …

In cognitive radio (CR) networks, medium access control (MAC) protocols play an important
role to exploit the spectrum opportunities, manage the interference to primary users (PUs) …

Dynamic spectrum policies combined with software defined radio are powerful means to
improve the overall spectral efficiency allowing the development of new wireless services …

Most of the existing technologies for cognitive radio network (CRN) is essential for providing
an effective solution for spectrum utilization problem in the wireless medium. Power …