Power Control Mechanism in OFDM Based Cognitive Radio System
Siyaram Yadav · IOSR Journal of Computer Engineering · 2014
Power is key parameter in communication system.In cognitive radio power of transmitter of primary user and secondary user should be at appropriate level for faithfull reception, at the same time there should be no interference between and among the adjacent users.In this paper power control mechanism is proposed for determining the primary user transmitter power.Interference caused due to primary user to secondary user is white noise by secondary user imply different noise levels in different sub channels.Here OFDM is used to fill the spectral gap for which OFDM channel filling optimization technique is used.