The Sum-Rate Capacity of Strong Interference Channels with Correlated Messages

Suhan CHOI  

IEICE TRANSACTIONS on Communications   Vol.E92-B   No.3   pp.1013-1016
Publication Date: 2009/03/01
Online ISSN: 1745-1345
DOI: 10.1587/transcom.E92.B.1013
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 [1] obtained by Costa and El Gamal. However, it can be larger than that of [1] if the messages are correlated. It is also shown that, in terms of the sum-rate, the achievable rate region in [2] is indeed the sum-rate capacity.