The paper presents a review of the scientific literature dealing with the wideband detection
of signals. Such problem is critical in Cognitive Radios (CRs), as it allows identifying the …

The electromagnetic spectrum is one of nature's meagre resources. The requirements of
wireless communication cannot be satisfied by the new spectrum allocation plan. A policy of …

The paper presents a review of the measurement methods and the technologies for
wideband spectrum sensing. Wideband spectrum sensing is a relevant task in RF …

As the demand for frequency resources increases because of the great number of new
wireless technologies, the frequency spectrum becomes overcrowded and solutions have to …

A tecnologia de rádio cognitivo tem sido uma importante área da pesquisa em
telecomunicações para a solução do problema da escassez espectral. Além de permitir a …

This thesis extensively analyses the performance of an energy detector which is widely
employed to perform spectrum sensing in cognitive radio over different generalised channel …

Cognitive radio is a smart radio that can change its transmitter parameter based on
interaction with the environment in which it operates. The demand for frequency spectrum is …

Cognitive radio is an emerging technology proposing the concept of dynamic spec-trum
access as a solution to the looming problem of spectrum scarcity caused by the growth in …

Spectrum scarcity is one of the major issues faced in Wireless communication technology.
Efficient spectrum utilization is of utmost importance to alleviate the problem of interference …

Many spectrum sensing techniques have been proposed in the literature to enable cognitive
radio technology. However, their reliability when primary users have very low signal-to-noise …