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The Sum-Rate Capacity of Strong Interference Channels with Correlated Messages
IEICE TRANSACTIONS on Communications
Publication Date: 2009/03/01
Online ISSN: 1745-1345
Print ISSN: 0916-8516
Type of Manuscript: LETTER
Category: Fundamental Theories for Communications
interference channels, correlated messages, achievable rate region, sum-rate capacity,
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The transmission of correlated messages over strong interference channels is examined. The result is the proposal of a single-letter characterization of the sum-rate capacity of strong interference channels with correlated messages. It is shown that if the messages are independent, the sum-rate capacity is equal to that of  obtained by Costa and El Gamal. However, it can be larger than that of  if the messages are correlated. It is also shown that, in terms of the sum-rate, the achievable rate region in  is indeed the sum-rate capacity.