Spectrum Monitoring and Interference Minimization Algorithm for OFDM-Based Cognitive Radio Networks

Cognitive radios network is programmable wireless devices to monitor spectrum used, and networking protocol as needed for better network and application performance. In Cognitive radio networks detection of Licensed user reappearance during the non-licensed user transmission is very much required. This paper presents a spectrum monitoring algorithm in support of that purpose for OFDM based CR networks. The technique decreases the rate of spectrum monitoring and offers the chance of less time between primary transmission and its detection. Interference impact on proposed technique is studied and results are also presented.