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Partner Cooperation With Decode-and-Forward: Closed-Form Outage Analysis and Comparison

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2 Author(s)
Benjillali, M. ; Commun. Syst. Dept., Inst. Nat. des Postes et Telecommun., Rabat, Morocco ; Alouini, M.

In this paper, we investigate the outage performance of “partner cooperation” based on opportunistic Decode-and-Forward with constrained partial selection and reactive relaying strategies in dual-hop cooperative Nakagami-m fading links. The source/destination, which is based on the unique knowledge of local channel state information, selects the best relay to increase the chances of cooperation in both uplink and downlink communications when the direct link is also available. After deriving new expressions for the cumulative distribution functions of the variables of interest, the outage probability of the system is obtained in closed-form. We also derive the ε-outage capacity in different particular cases, and the obtained results-when the channel model is reduced to a Rayleigh fading-either are new or correspond to those previously obtained in other works. Simulation results confirm the accuracy of our analysis for a large selection of system and fading parameters and provide a new insight into the design and optimization of cooperative configurations.

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Vehicular Technology, IEEE Transactions on  (Volume:62 ,  Issue: 1 )