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- W4295162134 abstract "This paper considers non-cooperative and fully-distributed power-allocation for secondary-users (SUs) in spectrum-sharing environments when normalized-interference to each secondary-user is uncertain. We model each uncertain parameter by the sum of its nominal (estimated) value and a bounded additive error in a convex set, and show that the allocated power always converges to its equilibrium, called robust Nash equilibrium (RNE). In the case of a bounded and symmetric uncertainty set, we show that the power allocation problem for each SU is simplified, and can be solved in a distributed manner. We derive the conditions for RNE's uniqueness and for convergence of the distributed algorithm; and show that the total throughput (social utility) is less than that at NE when RNE is unique. We also show that for multiple RNEs, the the social utility may be higher at a RNE as compared to that at the corresponding NE, and demonstrate that this is caused by SUs' orthogonal utilization of bandwidth for increasing the social utility. Simulations confirm our analysis." @default.
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- W4295162134 date "2011-03-24" @default.
- W4295162134 modified "2023-09-30" @default.
- W4295162134 title "Robust Spectrum Sharing via Worst Case Approach" @default.
- W4295162134 doi "https://doi.org/10.48550/arxiv.1103.4873" @default.
- W4295162134 hasPublicationYear "2011" @default.
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