A SURVEY ON DYNAMIC SPECTRUM ACCESS TECHNIQUES FOR COGNITIVE RADIO

作者：Anita Garhwal; Partha Pratim Bhattacharya

来源：International Journal of Next-Generation Networks, 2012.

• Wireless Communication
• Cognitive Radio
• Fuzzy Logic
• Spectrum Management
• Dynamic Spectrum Access.

Cognitive radio (CR) is a new paradigm that utilizes the available spectrum band. The key characteristic ofCR system is to sense the electromagnetic environment to adapt their operation and dynamically vary itsradio operating parameters. The technique of dynamically accessing the unused spectrum band is known asDynamic Spectrum Access (DSA). The dynamic spectrum access technology helps to minimize unusedspectrum bands. In this paper, main functions of Cognitive Radio (CR) i.e. spectrum sensing, spectrummanagement, spectrum mobility and spectrum sharing are discussed. Then DSA models are discussedalong with different methods of DSA such as Command and Control, Exclusive-Use, Shared Use of PrimaryLicensed User and Commons method. Game-theoretic approach using Bertrand game model, MarkovianQueuing Model for spectrum allocation in centralized architecture and Fuzzy logic based method are alsodiscussed and result are shown.

• 出版日期2012