Cognitive Radio System is a type of wireless communication system where a transceiver detects the communication channels that are in use. The transceiver then immediately moves into vacant channels, while avoiding occupied ones. These capabilities help to optimise the use of available radio frequency spectrum so it also minimises interference to other users. The occupied channels can be avoided to increase spectrum efficiency and it improves the quality of service (QoS) for other users.
The wireless radio frequency spectrum is a limited resource, normally allocated through a licensing process. The licensed spectrum is not always used ideally. Finally, some bands are overcrowded (GSM) while others are relatively unused (military). Cognitive radio is very efficient to use and to share resources optimally and intelligently.Click here to continue reading
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