The research on non-cooperative power control game algorithm for cognitive radio

Based on the non-cooperative power control game (NPG) proposed by David Goodman, an improved cost function is adopted. To meet the communications needs between licensed users and secondary users in cognitive radios, and ensured that the unimpaired operation of licensed users and secondary users´ communications be not intermitted, a MC-CDMA cognitive radio system and a hand-off technique were proposed for secondary users. In order to efficiently use the limited cognitive radio resources, a novel power control game algorithm in CR systems was adopted. The simulation results show that in comparison to several classical distributed algorithms, the novel algorithm can regulate their transmitter powers to meet the different SIR requirements and enhance the total throughput effectively. Besides, the performance of the system is significantly improved.