Emerging Applications of Cognitive Radios

Adnan Muhammad, Muhammad Qureshi, Mahmood Khan, Ashraf Khan
As per recent Federal Communications Commission (FCC) report, it has been observed that licensed spectrum bands are not being fully utilized by licensed users. Instead of exploring new spectrum bands at higher Giga hertz range, white spaces in existing frequency bands can be utilized for communication. Recently, cognitive radios have been introduced as being capable of increasing the spectral efficiency by opportunistically access both the licensed and unlicensed spectrum bands. In this
more » ... ds. In this literature, we have targeted some important applications of cognitive radios and surveyed the challenges facing by cognitive users in these applications.