Abstract:

A novel framework was proposed which introduced the Game Theory into the multiantenna power control in broadband wireless systems. Firstly, the power control problem was described as an Nperson noncooperating Game. Secondly, antenna's quality of service（QoS）level was formulated by a utility function and the cost for reaching the level is formulated by a price function. Finally, the process of power control was expressed as the process of maximum net utility (utility function minus price function) for each antenna. For the application of the framework, a new algorithm was also proposed. By the results of theoretical deductions and simulations, the algorithm converges to a fixed Nash equilibrium point and it also has the tunable parameter to meet the needs of different QoS levels.

Key words: multiple input multiple output, distributed power control, Game Theory