A New Approach in Spectrum Allocation for Next Generation Networks: Cognitive Radio
Eyüp Tuna, Medet Karagöz · DergiPark (Istanbul University) · 2012
In today’s wireless communication, a fixed spectrum assignment policy is implemented for each technology by some authorities. Development of different technologies, increase in users’s demands, inefficient usage of limited spectrum enable to emerge a new communication network paradigm and its rapid improvement. Cognitive radio networks which are also known as next generation networks aim to communicate continuously and rapidly as a result of using spectrum efficiently and dynamically. In this paper, due to having a key role for developing wireless communication systems, the cognitive radio technology is investigated. Basic principles and characteristics of cognitive radio networks and the techniques used by cognitive radio are explained. The specifications and the techniques are compared with classic radio and software defined radio. The proposed studies and challenges encountered are discussed.