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

Suhan CHOI 

Publication
IEICE TRANSACTIONS on Communications  Vol.E92-B  No.3  pp.1013-1016
Publication Date: 2009/03/01
Online ISSN: 1745-1345
Print ISSN: 0916-8516
Type of Manuscript: LETTER
Category: Fundamental Theories for Communications
Keyword: 
interference channels,  correlated messages,  achievable rate region,  sum-rate capacity, 

Full Text: PDF(120.9KB)

Summary: 
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.