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• W2146573076 abstract "Conventional distributed power control algorithms in cognitive radio (CR) are based on the assumption of perfect channel state information (CSI) which may lead to performance degradation in practical systems. In this paper, the robust distributed power control problem is investigated in CR systems by considering the uncertainty of channel gain. The objective is to maximize the sum rate of secondary users (SUs) subject to the primary users (PUs) interference power constraints and the transmission power constraint of SUs. The channel gain fluctuation is described using ellipsoid sets and the interference power constraints can be converted into robust interference power constraints. Lagrangian duality method is applied to solve the robust power control problem in a distributed way. Simulation results show that the effectiveness of the proposed robust algorithm." @default.
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• W2146573076 date "2014-11-30" @default.
• W2146573076 modified "2023-09-27" @default.
• W2146573076 title "Robust Power Control Algorithm for Multiple Primary Users and Secondary Users in Cognitive Radio Networks" @default.
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• W2146573076 doi "https://doi.org/10.14257/ijca.2014.7.11.08" @default.
• W2146573076 hasPublicationYear "2014" @default.
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