NDLI: On the Capacity Bounds of Non-Restricted Gaussian Amplify-and-Forward Two-Way Relay Channel

Content Provider	IEEE Xplore Digital Library
Author	Yu Zhang Zhaoyang Zhang Rui Yin
Copyright Year	1997
Abstract	In this letter, we revisit the non-restricted half-duplex Gaussian amplify-and-forward two-way relay channel (AF-TWRC). The inner and outer bounds of its capacity region are derived by evaluating Shannon's inner and outer bounds for general two-way channels. We prove that, in contrast to the case of Gaussian two-way channel (GTWC) where the two bounds coincide thus establishing its capacity region, the two bounds of AF-TWRC do not coincide unless both terminals are noise-free, due to that the intermediate relay node introduces additional power constraint relating to the correlation of channel inputs from both terminals. This indicates that the capacity region of non-restricted Gaussian AF-TWRC, which was previously believed to be already established in a way similar to that of GTWC, still remains open. We further investigate a special case of non-restricted AF-TWRC where the relay is noise-free, and obtain its capacity region based on the tighter dependence balance bound.
Starting Page	1540
Ending Page	1543
Page Count	4
File Size	203639
File Format	PDF
ISSN	10897798
Volume Number	16
Issue Number	10
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2012-10-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Relays Joints Gaussian distribution Correlation Covariance matrix Entropy Decoding dependence balance Amplify-and-forward two-way relay channel capacity bound
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering Modeling and Simulation Computer Science Applications

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