On the Capacity Bounds of Non-Restricted Gaussian Amplify-and-Forward Two-Way Relay Channel
On the Capacity Bounds of Non-Restricted Gaussian Amplify-and-Forward Two-Way Relay Channel
复制标题
无限制高斯放大转发双向中继通道的容量界限
DOI:
10.1109/lcomm.2012.081612.120214
复制
发表时间:
2012-08
期刊:
影响因子:
--
通讯作者:
Zhaoyang Zhang
中科院分区:
文献类型:
--
作者:
Yu Zhang;Zhaoyang Zhang
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.
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影响因子:
2.5
作者:
HEKSTRA, AP;WILLEMS, FMJ
通讯作者:
WILLEMS, FMJ
DOI:
10.1109/tit.1984.1056847
发表时间:
1984
期刊:
IEEE Trans. Inf. Theory
影响因子:
--
作者:
T. Han
通讯作者:
T. Han
DOI:
10.1109/isit.2006.261638
发表时间:
2006-07
期刊:
2006 IEEE International Symposium on Information Theory
影响因子:
--
作者:
B. Rankov;A. Wittneben
通讯作者:
B. Rankov;A. Wittneben
影响因子:
2.5
作者:
R. Tandon;S. Ulukus
通讯作者:
R. Tandon;S. Ulukus
DOI:
--
发表时间:
1961
期刊:
--
影响因子:
--
作者:
C. Shannon
通讯作者:
C. Shannon