The increasing popularity of wireless services and devices necessitates high bandwidth
requirements; however, spectrum resources are not only limited but also heavily …

In wireless multimedia cognitive radio networks (WMCRNs), to optimize multimedia
transmissions and scarce wireless spectrum utilization, a multimedia secondary user (MSU) …

The goal of spectrum sensing is to elevate the detection performance of secondary users
(SUs) in a cognitive radio network (CRN). In cooperative spectrum sensing, all secondary …

Cognitive radio (CR) provides a better way for utilization of spectrum resource by introducing
an opportunistic usage of the frequency bands that are not heavily occupied by a licensed …

Spectrum sensing and access have been widely investigated in cognitive radio network for
the secondary users to efficiently utilize and share the spectrum licensed by the primary …

In this thesis new methods are presented for achieving spectrum sensing in cognitive radio
wireless networks. In particular, supervised, semi-supervised and unsupervised machine …

In cognitive radio techniques, OFDM is usually regarded as the physical layer candidate.
However, the weaknesses of the OFDM technique, ie, using plain FFT for spectral analysis …

The growing problem of spectrum scarcity and the inefficient spectrum utilization in the
licensed bands, are addressed by the emerging Cognitive Radio (CR) paradigm. It is seen …

Channel sensing order setting is crucial for efficient channel exploration and exploitation in
cognitive radio (CR) networks. This paper investigates the sensing order setting problem in …

In this paper, we propose a multi-channel parallel transmission mechanism for channel
assignment in cognitive radio (CR) networks. The proposed mechanism enables secondary …