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This paper addresses power allocation between channels in a cognitive radio system, and uses insights from information theory to compare the total capacity available using a fully distributed power allocation scheme with an optimum scheme based on perfect knowledge of all links. First the equations for optimum allocation are obtained, leading to an extension of the water-filling power allocation,...
This paper addresses power allocation between channels in a cognitive radio system, and uses insights from information theory to compare the total capacity available using a fully distributed power allocation scheme with an optimum scheme based on perfect knowledge of all links. First the equations for optimum allocation are obtained, leading to an extension of the water-filling power allocation,...
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