A Novel Power Control Game Algorithm for Cognitive Radio

A new power control algorithm is proposed in a cognitive radio system with MC-CDMA. A new utility function that is formed by transmit power and SIR is applied to the algorithm and the static nash equilibrium is obtained for utility function. The nash equilibrium power in new algorithm provides substantial power saving as compared to SIR balancing algorithm and Koskie-Gajic algorithm while reducing the achieved SIR only slightly. The simulation results show that the novel algorithm can regulate their transmitter powers to meet the different SIR requirements and enhance the total throughput effectively. The performance of CR system is thereby improved obviously.