Use Of Smart Antennas for Collaborative Spectrum Sensing in Cognitive Radio

Exponentially increasing demand of bandwidth forcing the future wireless systems to have spectrum efficiency, cost reduction, service quality optimization, and transparent operation across wireless networks. Spectrum scarcity is alleviated by cognitive radio and promises to improve temporal spectral efficiency. The collaborative communication increases accuracy & throughput of CR. Further, Cooperative communication with smart antennas extends CR in both space and time. A CR based on smart antennas is both adaptable and non-intrusive, is being investigated in this paper. The suggested method utilizes beam forming to improve spectrum sharing between primary and cognitive users. Cognitive transmitters with SA are designed to minimize interference to the main receiver. Result shows successful transmission rate of CR user, thus improving spectrum utilization.