Cognitive radio (CR) has emerged as a promising technology to exploit the unused portions
of spectrum in an opportunistic manner. The fixed spectrum allocation of governmental …

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

Design of an efficient medium access control protocol is critical for proper functioning of a
distributed cognitive radio network and better utilization of the channels not being used by …

Inefficient use of radio spectrum is becoming a serious problem as more and more wireless
systems are being developed to operate in crowded spectrum bands. Cognitive radio offers …

With the fast adoption of Internet of Things devices in our lives, the demand for the wireless
spectrum has increased manyfold. With existing static spectrum allocation policies in use, it …

In this paper, we present a novel capacity-aware spectrum allocation model for cognitive
radio networks. First, we model interference constraints based on the interference …

Cognitive radio is an exciting emerging technology that has the potential of dealing with the
urgent requirement and scarcity of the radio spectrum. Although having multiple radio …

With the increasing demands for wireless communication, efficiently using the spectrum
resource has always been an important research topic. In this paper, the problem of N pairs …

Coherent communications aim to support higher data rates and extended connectivity at
lower power consumption compared with traditional point-to-point transmissions. The typical …

In IEEE 802.22 Wireless Regional Area Networks (WRANs), each Base Station (BS) solves
a complex resource allocation problem of simultaneously determining the channel to reuse …