Current Trends and Research Challenges in Spectrum-Sensing for Cognitive Radios

Após ponderação e conclusões provisórias, surgidas durante a redacção e análise destes contextos históricos e de produção de obra individual em cada uma das duas

It is based on using the channel of the licensed user (also called primary user, PU), if the PU is not using it and without harmful interference. The harmful interference is

This picture suggests an active group of children and young people us- ing the internet in public places, most of them from low SES households and living with parents that are unable

This scheme was proposed as a solution to the problem of noise uncertainty, fading and shadowing. This scheme decreases the probabilities of false detection and false

Cognitive Radio (CR) is a developing technology to overcome the problem of using the spectrum inefficiently by improving idle spectrum utilization in both temporally and spatially.

The manuscripts in both the ISPRS Annals and Archives cover a broad range of topics related to remote sensing platforms and technologies, and reflect the current trends in

CR is an persuasive resolution to the spectral congestion crisis by establishing the opportunistic exploitation of unused frequency bands that are not significantly engaged through

By introducing the trust scheme into the fuzzy logic scheme to represent the reliability of the nodes, a cooperative spectrum sensing scheme based on trust and fuzzy logic for