Rate Regions of a Two-Way Gaussian Relay Channel

Jianquan Liu; Meixia Tao; Youyun Xu

ChinaCom2009-Signal Processing for Communications Symposium

Research Article

Rate Regions of a Two-Way Gaussian Relay Channel

Cite: BibTeX Plain Text

@INPROCEEDINGS{10.1109/CHINACOM.2009.5339832,
    author={Jianquan Liu and Meixia Tao and Youyun Xu},
    title={Rate Regions of a Two-Way Gaussian Relay Channel},
    proceedings={ChinaCom2009-Signal Processing for Communications Symposium},
    publisher={IEEE},
    proceedings_a={CHINACOM2009-SPC},
    year={2009},
    month={11},
    keywords={},
    doi={10.1109/CHINACOM.2009.5339832}
}

Jianquan Liu
Meixia Tao
Youyun Xu
Year: 2009
Rate Regions of a Two-Way Gaussian Relay Channel
CHINACOM2009-SPC
IEEE
DOI: 10.1109/CHINACOM.2009.5339832

Jianquan Liu¹^,*, Meixia Tao¹^,*, Youyun Xu¹

1: Department of Electronic Engineering Shanghai Jiao Tong University, Shanghai, 200240, China

*Contact email: jianquanliu@sjtu.edu.cn, mxtao@sjtu.edu.cn

Abstract

We study two-way communications over a threenode Gaussian relay channel. Several practical relaying strategies are considered, including bitwise XOR-based decode-andforward (DF), superposition-based DF, and amplify-and-forward (AF). For each considered two-way relay scheme, we show that its achievable rate pair is governed by a set of linear inequalities. As a result, we obtain explicit, analytical expressions as well as geometrical shapes of the rate regions for each scheme. Our analytical results provide a convenient and efficient way to evaluate the performance of two-way relaying at any channel conditions. Numerical examples are also presented to demonstrate and compare the rate regions and maximum sumrates of the considered schemes at different relay locations.

Published: 2009-11-20
Publisher: IEEE
Modified: 2010-05-16

: http://dx.doi.org/10.1109/CHINACOM.2009.5339832