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• W2951934635 abstract "This paper studies a Gaussian Z-interference channel with a rate-limited digital relay link from one receiver to another. Achievable rate regions are derived based on a combination of Han-Kobayashi common-private information splitting technique and several different relay strategies including compress-and-forward and a partial decode-and-forward strategy, in which the interference is partially decoded then binned and forwarded through the digital link for subtraction at the other end. For the Gaussian Z-interference channel with a digital link from the interference-free receiver to the interfered receiver, the capacity region is established in the strong interference regime; an achievable rate region is established in the weak interference regime. In the weak interference regime, the partial decode-and-forward strategy is shown to be asymptotically sum-capacity achieving in the high signal-to-noise ratio and high interference-to-noise ratio limit. In this case, each relay bit asymptotically improves the sum capacity by one bit. For the Gaussian Z-interference channel with a digital link from the interfered receiver to the interference-free receiver, the capacity region is established in the strong interference regime; achievable rate regions are established in the moderately strong and weak interference regimes. In addition, the asymptotically sum capacity is established in the limit of large relay link rate. In this case, the sum capacity improvement due to the digital link is bounded by half a bit when the interference link is weaker than certain threshold, but the sum capacity improvement becomes unbounded as the interference link becomes stronger." @default.
• W2951934635 created "2019-06-27" @default.
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• W2951934635 date "2010-06-25" @default.
• W2951934635 modified "2023-10-16" @default.
• W2951934635 title "Gaussian Z-Interference Channel with a Relay Link: Achievability Region and Asymptotic Sum Capacity" @default.
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• W2951934635 doi "https://doi.org/10.48550/arxiv.1006.5087" @default.
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