Outage performance of a network coding aided multi-user cooperative secondary network

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• 作者：S. B. Mafra ; R. D. Souza ; J. L. Rebelatto ; G. Brante and O. K. Rayel
• 刊名：Transactions on Emerging Telecommunications Technologies
• 出版年：2017
• 出版时间：February 2017
• 年：2017
• 卷：28
• 期：2
• 全文大小：987K
• ISSN：2161-3915

文摘

We evaluate the performance of a network-coded cooperative secondary network in a cognitive radio system under spectrum sharing constraints. The secondary network is composed of multiple sources that cooperate to transmit their own information to a common secondary destination. The outage probability is analysed under a given maximum interference constraint set by the primary network as well as to the maximum transmit power limit of the secondary sources. Moreover, we also obtain a closed-form equation for the ϵ-outage capacity, that is, the maximum information rate achieved by the secondary sources given a target outage probability. Also, we resort to the Dinkelbach algorithm in order to find the optimum number of parity packets that maximises the ϵ-outage capacity. The influence of the number of source nodes and another system parameters in the secondary's performance is also evaluated, and we show through theoretical and numerical results that cooperative communication with network coding can provide significant gains in terms of outage probability and diversity order when compared with non-cooperative or traditional cooperative. Copyright