Achievable Rate Region for the Two-User Gaussian X Channel with Limited Receiver Cooperation: General Case

Surapol TAN-A-RAM  Watit BENJAPOLAKUL  

Publication
IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences   Vol.E100-A   No.3   pp.822-831
Publication Date: 2017/03/01
Online ISSN: 1745-1337
Type of Manuscript: PAPER
Category: Information Theory
Keyword: 
achievable rate region,  Han-Kobayashi (HK) strategy,  receiver cooperation,  X channel,  

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Summary: 
In this paper, we propose to use a strategy for the two-user Gaussian X channel with limited receiver cooperation in the general case consisting of two parts: 1) the transmission scheme where the superposition coding is used and 2) the cooperative protocol where the two-round strategy based on quantize-map-and-forward (QMF) is employed. We image that a Gaussian X channel can be considered as a superposition of two Gaussian interference channels based on grouping of the sent messages from each transmitter to the corresponding receivers. Finally, we give an achievable rate region for the general case of this channel.