The cognitive radio (CR) communication system is capable of collecting the information
about its location, radio-frequency spectrums, and the present environment, so that it can …

The past decades witnessed the fast development of the wireless communication
technologies and its applications. However, the upgrading demand is contradictory to the …

Data Transmission plays an important role in the digital world. This transfer occurs via point-
to-point data streams or channels. These channels may previously have been in the form of …

the wireless traffic is increasing in an unparalleled way, which causes radio spectrum
shortage. The fixed spectrum assignment policy makes this problem more critical. Cognitive …

Cognitive Radio (CR) is a promising technology to improve the spectrum utilization
efficiency. Due to the increasing demand for wireless communication CR allows better use …

Cognitive radio (CR) is the enabling system for sustaining dynamic spectrum admittance: the
policy that addresses the spectrum shortage difficulty that is encountered in many countries …

Defined Radio (SDR) that, in addition to the re-configuration capability, also has the ability to
analyze its surrounding radio environment and decide how best to re-configure itself. The …

An important functionality of cognitive radio network is spectrum sensing. It is performed to
determine the idle frequency bands that are not being occupied by a licensed primary user …