Abstract Much interest in Cognitive Radio Networks (CRNs) has been raised recently by
enabling unlicensed (secondary) users to utilize the unused portions of the licensed …

In-depth spectrum measurement was conducted in rural and urban locations, covering 50
MHz–6 GHz bands, during the weekdays and weekends. A modified duty cycle metric is …

Continuing proliferation of wireless devices exposes humanity to the reality of the twin
challenge posed by finite frequency spectrum and almost infinite demand for the same …

Latterly, a lot of attention has been given to the use of white space as a solution to the
spectrum scarcity. Several measurement campaigns have been performed in many …

Spectrum handoff is a crucial function of Cognitive Radio (CR) which is the change of
operating frequency. The main problem in spectrum handoff is the time taken in the …

The introduction of new kinds of technological products, applications and services that rely
on wireless communications has resulted into an upsurge inglobal mobile data traffic. There …

This paper examines the spatial variability of duty cycle in the GSM 900 and 1800 MHz
bands within Kwara State, Nigeria. The results show spatial variance in the duty cycle with …

Train safety and non-safety services are provided through radio communications systems.
Railway Radio Communication Systems between Train and Trackside (RSTT) is the …

The number of wireless devices is ever increasing and the band they operate in are getting
more congested, In such circumstances cognitive radio answers to all the underutilization …

The proliferation of smartphones usage necessitates the increase of mobile data traffic
volumes. Thus, Mobile Network Operators (MNOs) have to expand their network …