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Several wireless systems that seek to exploit multiuser or spatial diversity need to opportunistically select a 'Best' node from among the many available nodes. This is done on the basis of a suitability metric that is locally known at each node, and is initially not known elsewhere. While a fast, scalable, multiple access based algorithm is known today for doing this in a distributed manner, it assumes perfect knowledge of statistical parameters such as the cumulative distribution function of the suitability metric and also the total number of nodes.
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