Journal of Information Processing Systems

Korea Information Processing Society (한국정보처리학회)
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A Power Allocation Algorithm Based on Variational Inequality Problem for Cognitive Radio Networks

  • Zhou, Ming-Yue (College of Computer Science and Technology, Changchun University of Technology) ;
  • Zhao, Xiao-Hui (Key Laboratory of Information Science, College of Communication Engineering, Jilin University)
  • Received : 2016.06.15
  • Accepted : 2016.09.10
  • Published : 2017.04.30
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Abstract

Power allocation is an important factor for cognitive radio networks to achieve higher communication capacity and faster equilibrium. This paper considers power allocation problem to each cognitive user to maximize capacity of the cognitive systems subject to the constraints on the total power of each cognitive user and the interference levels of the primary user. Since this power control problem can be formulated as a mixed-integer nonlinear programming (NP) equivalent to variational inequality (VI) problem in convex polyhedron which can be transformed into complementary problem (CP), we utilize modified projection method to solve this CP problem instead of finding NP solution and give a power control allocation algorithm with a subcarrier allocation scheme. Simulation results show that the proposed algorithm performs well and effectively reduces the system power consumption with almost maximum capacity while achieve Nash equilibrium.

Keywords

Acknowledgement

Supported by : National Natural Science Foundation of China, Jilin province Education Office

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