Are you involved in designing the next generation of wireless networks? With spectrum
becoming an ever scarcer resource, it is critical that new systems utilize all available …

In cognitive radio networks, the performance of the spectrum sensing depends on the
sensing time and the fusion scheme that are used when cooperative sensing is applied. In …

Cognitive radio allows for usage of licensed frequency bands by unlicensed users.
However, these unlicensed (cognitive) users need to monitor the spectrum continuously to …

In this paper, we study resource allocation for multiuser multiple-input-single-output
secondary communication systems with multiple system design objectives. We consider …

In this paper, we consider the problem of spectrum sensing by using multiple antenna in
cognitive radios when the noise and the primary user signal are assumed as independent …

Cognitive radio (CR) is regarded as an emerging technology, which equips wireless devices
with the capability to adapt their operating parameters on the fly based on the radio …

Spectrum sensing is critically important for cognitive radio, an emerging solution to the
spectrum congestion and low usage of licensed spectrum. Energy detection is a promising …

Cognitive radio (CR) can successfully deal with the growing demand and scarcity of the
wireless spectrum. To exploit limited spectrum efficiently, CR technology allows unlicensed …

ldquoSpectrum holesrdquo represent the potential opportunities for noninterfering (safe) use
of spectrum and can be considered as multidimensional regions within frequency, time, and …

We propose a two-phase protocol based on cooperative decode-and-forward relaying for a
secondary system to achieve spectrum access along with a primary system. The primary and …