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This paper covers an extensive detailed analysis about the use of cooperative communication in cognitive radio especially the underlay technique. Authors have also tried to explain the effect of using multiple relay instead of single relay on outage probability. Asymptotic analysis of the proposed system model is also derived and results are compared. This papers explains the use cooperative communication...
Cognitive radio has been proposed as the means for secondary users to promote the efficient utilization of the spectrum by exploiting the existence of spectrum holes. Meanwhile, cooperative diversity techniques can improve the transmission rate and reliability of wireless networks. In this paper, both the case of relay participating in the cognitive networks and the case of relay selection are considered...
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