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In this paper, we investigate the shaping loss in a two-user Gaussian multiple-access channel (MAC) with network coding. We conjecture that the shaping loss in this system model is much larger than 1.53 dB, verified by simulation results. To recover such large shaping loss, we consider the combination of physical-layer network coding with constellation shaping, and propose a physical-layer shaped...
We consider a two-way relay system where two sources exchange information with the assistance of multiple, non-cooperative, relay nodes. Specifically, we propose a capacity upper bound for the two-way relay channel and derive the achievable regions for different relay strategies, such as the amplify-and-forward (AF), the decode-and-forward (DF) and the compress-and-forward (CF). Furthermore, the upper...
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