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The capacity region of Gaussian interference channel in the weak interference regime is an open problem. Recently, Etkin, Tse and Wang derived an outer bound for the two-user Gaussian interference channel and proved that a simple Han-Kobayashi signaling scheme can achieve within one bit of the capacity region for all values of channel parameters. In this paper, we extend their result to the K-user...
This paper characterizes the capacity of a class of modular additive noise relay channels, in which the relay observes a corrupted version of the noise and has a separate channel to the destination. The capacity is shown to be strictly below the cut-set bound in general and achievable using a quantize-and-forward strategy at the relay. This result confirms a previous conjecture on the capacity of...
This paper studies a Gaussian Z-interference channel with a rate-limited digital relay link from the interference-free receiver to the interfered receiver. An achievable rate region is derived based on a combination of the Han-Kobayashi common-private information splitting technique and a partial interference-forwarding relaying strategy in which a part of the interference is decoded then forwarded...
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