Power control based on game theory in cognitive radio

Power control is one of the key technologies in cognitive radio network. This article integrates game element into power control algorithm in cognitive radio. On the basis of traditional model, an improved cost function is presented. Combined with game theory, the existence and uniqueness of Nash equilibrium solution of the game model is proved. Simulation results suggest that the convergence of the proposed game algorithm based on new cost function is superior to the traditional algorithm, the equity of the system is also considered in a certain degree.