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Using relays to extend the coverage of base-stations in cellular systems has been of interest in recent years as it can reduce the cost of installing more base-stations and yet cater to mobile terminals within a wider coverage area. There have been recent advances where two or more half duplex relay stations are used to recover the loss of bandwidth due to the use of half duplex relays. However, such...
In this paper, we derive the moments of the harmonic mean of two independent gamma distributed random variables which have the same shape parameter but different scale parameters. We then apply these results to analyze the average sum rate of two-way amplify-and-forward (AF) half- duplex relaying systems. By deriving tight upper and lower bounds for the average sum rate of two-way relaying, we show...
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