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Selective relaying based on instantaneous channel status is usually adopted to improve transmission performance in cooperative communication systems. However, such scheme has an extremely high computational complexity. To reduce the complexity, we propose a selective cooperation scheme to decide whether cooperative transmission should be adopted or not by utilizing statistical channel information...
The fading AWGN two-user two-hop network is considered where the channel coefficients are independent and identically distributed (i.i.d.) according to a continuous distribution and vary over time. For a broad class of channel distributions, the ergodic sum capacity is characterized to within a constant number of bits/second/hertz, independent of the signal-to-noise ratio. The achievability follows...
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