In 2008, the Federal Communications Commission issued a ruling permitting the unlicensed
usage of TV white spaces (TVWS), ie locally vacant TV channels. Due to its low‐frequency …

TV white spaces refer to the allocated but locally unused TV spectrum and can be used by
unlicensed devices as secondary users. Thanks to their lower frequencies (eg, 54–698 MHz …

Unused spectrum in the television band (so-called TV white space) has the potential to
provide new spectrum for access to information and communication services in developing …

Emerging cognitive radio networking technology potentially provides a promising solution to
the spectrum underutilization problem in wireless access. In this paper, a cross-layer routing …

Spectrum sensing is a key operation in cognitive radio (CR) systems, where secondary
users (SUs) are able to exploit spectrum opportunities by first detecting the presence of …

The emergence of bandwidth-driven applications in the current wireless communication
environment is driving a paradigm shift from the conventional fixed spectrum assignment …

El espectro radioeléctrico es el insumo esencial para prestar servicios inalámbricos. Un
correcto y eficiente uso del mismo permite que los prestadores de estos servicios, en …

Since telecommunications represent a strategic asset for the railway industry and a focal
point for its evolution, it is important to consider emerging standards and technologies …

This paper presents performance evaluation of multi-user diversity in an underlay spectrum
sharing system, over Rayleigh fading channels, in which primary and secondary receivers …

Initial ranging is the primary and important process in wireless networks for the customer
premise equipments (CPEs) to access the network and establish their connections with the …