Unlicensed wireless technologies don't require any permission, so long as products and users comply with the rules associated with that unlicensed band. Unlicensed wireless technologies are vulnerable to interference.
Published in Chapter:
Sensing Techniques for Next Generation Cognitive Radio Networks: Spectrum Sensing in Cognitive Radio Networks
Dhaya R. (Rajalakshmi Engineering College, India), Rajeswari A. (Velammal Engineering College, India), and Kanthavel R. (V V College of Engineering, India)
Copyright: © 2019
|Pages: 17
DOI: 10.4018/978-1-5225-5354-0.ch006
Abstract
Cognitive radio is the technology used to solve the problem of spectrum underutilization by performing spectrum sensing, spectrum management, spectrum sharing, and spectrum mobility. The primary goal of cognitive radio is open spectrum sharing. Spectrum is a scarce and valuable natural resource that has to be used very effectively. The static allocation of spectrum to the licensed users will lead to wastage of resources when the spectrum is unused by the licensed user. Spectrum sensing methodology helps in detecting the spectrum holes and enables the unlicensed users to access the unused bands in the licensed spectrum effectively without interfering the licensed users. Cognitive thinking takes wireless communication to the next level by sensing the electromagnetic environment and dynamically adjusts its operating parameters in order to achieve maximum throughput, mitigate interference, facilitate interoperability, etc. The chapter presents the basics of cognitive radio networks, its architecture, its application, and advantages of cognitive radio networks.