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Capacity Region of Vector Gaussian Interference Channels With Generally Strong Interference

Author(s): Shang, Xiaohu; Poor, H Vincent

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Abstract: An interference channel is said to have strong interference if a certain pair of mutual information inequalities are satisfied for all input distributions. These inequalities assure that the capacity of the interference channel with strong interference is achieved by jointly decoding the signal and the interference. This definition of strong interference applies to discrete memoryless, scalar and vector Gaussian interference channels. However, there exist vector Gaussian interference channels that may not satisfy the strong interference condition but for which the capacity can still be achieved by jointly decoding the signal and the interference. This kind of interference is called generally strong interference. Sufficient conditions for a vector Gaussian interference channel to have generally strong interference are derived. The sum-rate capacity and the boundary points of the capacity region are also determined.
Publication Date: Jun-2012
Citation: Shang, Xiaohu, and H. Vincent Poor. "Capacity region of vector Gaussian interference channels with generally strong interference." IEEE Transactions on Information Theory 58, no. 6 (2012): 3472-3496. doi:10.1109/TIT.2012.2190042
DOI: 10.1109/TIT.2012.2190042
ISSN: 0018-9448
EISSN: 1557-9654
Pages: 3472 - 3496
Type of Material: Journal Article
Journal/Proceeding Title: IEEE Transactions on Information Theory
Version: Author's manuscript

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