This study evaluates the performance of the energy detection based spectrum sensing
technique in noisy and fading environments. Both single user detection and cooperative …

Cognitive radio is one of the most effective techniques to improve the spectrum utilization
efficiency. To implement the cognitive radio, spectrum sensing is considered as the key …

With the evolution of cognitive radio, there are continuously an ongoing development to
make it more efficient. More stress is given on the Sensing and Management of cognitive …

Spectrum scarcity causes a hurdle to the implementation of emerging wireless applications
which require more frequency spectrum. Cognitive Radio (CR) has provided a promising …

Energy detection is widely used in cognitive radio due to its low complexity. One
fundamental challenge is that its performance degrades in the presence of noise …

Cognitive Radio (CR) is an intelligent system for opportunistically accessing the idle
resources and a solution for spectrum resources scarcity. The main purpose of this article is …

Methods for primary user detection in cognitive radio may be severely impaired by noise
uncertainty (NU) and the associated SNR wall phenomenon. The ability to avoid the SNR …

Spectrum scarcity became a serious problem in recent years, due to the multitude of
communication systems requiring frequency resources. Cognitive Radio (CR) technology …

Cognitive radio has a critical application which it is Spectrum access, and knowing that the
key to this application is detected in the spectrum to find free bands. Nowadays the studies …

We propose a novel structure where the energy detector has multiples of verification using
time delay, in order to improve its performance. Additionally, the performance is investigated …