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DOI码：10.1109/TWC.2011.120511.110269
发表刊物：IEEE Transactions on Wireless Communications
摘要：Two-way relaying can significantly improve the spectrum efficiency of bi-directional information transmission between two nodes with the help of half-duplex relays. However, in the general case of asymmetric channel gains, the achievable rates of both directions are restricted by the link with the worse channel quality. In this paper, we propose a new three-phase cooperative transmission protocol, which exploits the direct link and the time resource of a two-way relay system more efficiently. We derive the rate region outer bound of this protocol, and propose a practical transmission scheme based on doubly nested lattice codes, which can achieve this outer bound within 0.5 bit. Numerical results show the superiority of this protocol over two other classical protocols in asymmetric channels.
论文类型：期刊论文
一级学科：信息与通信工程
文献类型：期刊
卷号：11
期号：2
页面范围：694-702
是否译文：否
发表时间：2012-02-01
收录刊物：SCI
发布期刊链接：https://ieeexplore.ieee.org/document/6108301