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An uplink power control algorithm using traditional iterative model for cognitive radio networks

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Abstract

Based on the analysis of the feature of cognitive radio networks, a relevant interference model was built. Cognitive users should consider especially the problem of interference with licensed users and satisfy the signal-to-interference noise ratio (SINR) requirement at the same time. According to different power thresholds, an approach was given to solve the problem of coexistence between licensed user and cognitive user in cognitive system. Then, an uplink distributed power control algorithm based on traditional iterative model was proposed. Convergence analysis of the algorithm in case of feasible systems was provided. Simulations show that this method can provide substantial power savings as compared with the power balancing algorithm while reducing the achieved SINR only slightly, since 6% SINR loss can bring 23% power gain. Through further simulations, it can be concluded that the proposed solution has better effect as the noise power or system load increases.

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Correspondence to Feng Li  (李枫).

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Foundation item: Project(61071104) supported by the National Natural Science Foundation of China

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Li, F., Tan, Xz. & Wang, L. An uplink power control algorithm using traditional iterative model for cognitive radio networks. J. Cent. South Univ. 19, 2816–2822 (2012). https://doi.org/10.1007/s11771-012-1347-0

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  • DOI: https://doi.org/10.1007/s11771-012-1347-0

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