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| Power Control Algorithm Based on Differential Game for CR System |
| Zhang Long,Zhou Xian-wei,Wang Jian-ping,Huang Wei,Ma Zhong-gui |
| School of Information Engineering, University of Science and Technology Beijing, Beijing 100083, China |
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Abstract Considering the dynamic nature in Cognitive Radio (CR) system, differential game theory is adopted in power control for CR system and a novel model of noncooperative differential game for power control is presented. Then a distributed noncooperative power control algorithm based on differential game is proposed in this paper. The proposed algorithm achieves the distributed dynamic power control under the condition that the requirements, including the average power threshold and QoS of secondary users, are guaranteed. Furthermore, an analytical solution to feedback Nash equilibrium is obtained. Simulation results show that the proposed algorithm can regulate the transmitted power of secondary users effectively to enhance the total throughput, and the performance of CR system is thereby improved.
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Received: 24 December 2008
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Corresponding Authors:
Zhang Long
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2010, Vol. 32 
