F. A. Khan, K. Tourki, Mohamed-Slim Alouini, K. Qaraqe
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Outage and SER performance of an opportunistic multi-user underlay cognitive network
Consider a multi-user underlay cognitive network where multiple cognitive users concurrently share the spectrum with a primary network and a single secondary user is selected for transmission. The channel is assumed to have independent but not identical Nakagami-m fading. Closed form expressions for the outage performance and the symbol-error-rate performance of the opportunistic multi-user secondary network are derived when a peak interference power constraint is imposed on the secondary network in addition to the limited peak transmit power of each secondary user.
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