Sliding-window superposition coding for interference networks

ISIT(2014)

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摘要
Superposition coding with successive cancellation decoding for interference channels is investigated as a low-complexity alternative to the rate-optimal simultaneous decoding. It is shown that regardless of the number of superposition layers and the code distribution of each layer, the standard rate-splitting scheme by Grant, Rimoldi, Urbanke, and Whiting for multiple access channels fails to achieve the simultaneous decoding inner bound on the capacity region for interference channels. A new coding scheme is proposed that uses coding over multiple blocks and sliding-window decoding. With at most two superposition layers, this scheme achieves the simultaneous decoding inner bound for any two-user-pair interference channels without using high-complexity simultaneous multiuser sequence detection. The proposed coding scheme can be also extended to achieve the performance of simultaneous decoding for general interference networks, including the Han-Kobayashi inner bound.
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关键词
radiofrequency interference,code distribution,superposition layers,successive cancellation decoding,han-kobayashi inner bound,multi-access systems,wireless channels,sliding-window decoding,interference suppression,multiple access channels,high-complexity simultaneous multiuser sequence detection,sliding-window superposition coding,two-user-pair interference channels,decoding,rate-splitting scheme,network coding,interference networks
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