Exploring Dynamic Spectrum Access with Cognitive Radio: A Review

The problem faced by wireless systems is to find the suitable spectrum bands for the fulfilment of future demands. All of radio spectrum has been allocated different services, user and applications; still it is shown in the observations that the spectrum usage is quite low. Therefore concept of cognitive radio has been used to overcome this problem with the utilisation of spectrum. Cognitive Radio is the type of wireless communication in which a transmitter and receiver are used to detect communication channel those in use and not in use .It helps in minimising the concept of interference among users with the fair use of the available radio frequency. Dynamic spectrum access is an approach used to decrease the spectrum scarcity in wireless communication. The reuse of sparsely occupied frequency bands and interference are the major aims.