Smart Radio Spectrum Management for Cognitive Radio

Today’s wireless networks are characterized by fixed spectrum assignment policy. The limited available spectrum and the inefficiency in the spectrum usage necessitate a new communication paradigm to exploit the existing wireless spectrum opportunistically. Cognitive radio is a paradigm for wireless communication in which either a network or a wireless node changes its transmission or reception parameters to communicate efficiently avoiding interference with licensed or unlicensed users. It can capture best available spectrum to meet user communication requirements (spectrum management). In this work, a fuzzy logic based system for spectrum management is proposed where the radio can share unused spectrum depending on parameters like distance, signal strength, node velocity and availability of unused spectrum. The system is simulated and is found to give satisfactory results.