Abstract:

Power control and dynamic spectrum access are key technologies for improving spectrum utilization ratio in satellite communication. Primary users are rewarded for allowing secondary users to communication in their licensed spectrum by dynamic spectrum leasing. A game theoretic framework with primary users and secondary user as players and with two different utility functions is developed. An optimal power allocation strategy that could satisfy both types of users and could max system throughput by payoff dominance selection of Nash equilibrium is addressed. The relation between users number and transfer power is performed, and simulation results show the increase of the secondary users number that system could afford and the minimum SINR required by primary users within the confines of a certain extent could enhance system throughput.