@inproceedings{8e4823a83c2f4ae6b75ea00f85139eae,
title = "MIMO Four-Way Relaying",
abstract = "Two-way relaying in wireless systems has initiated a large research effort during the past few years. Nevertheless, it represents only a specific traffic pattern and it is of interest to investigate other traffic patterns where such a simultaneous processing of information flows can bring performance advantage. In this paper we consider a \emph{four-way relaying} multiple-input multiple-output (MIMO) scenario, where each of the two Mobile Stations (MSs) has a two-way connection to the same Base Station (BS), while each connection is through a dedicated Relay Station (RS). The RSs are placed in such a way that one RS and the terminals associated with it do not interfere with the other RS, and vice versa. We introduce and analyze a two-phase transmission scheme to serve the four-way traffic pattern defined in this scenario. Each phase consists of combined broadcast and multiple access. We analyze the sum-rate of the new scheme for Decode-and-Forward (DF) operational model for the RS. We compare the performance with state-of-the-art reference schemes, based on two-way relaying with DF. The results indicate that the sum-rate of the two-phase four-way relaying scheme largely outperforms the four-phase scheme, while closely approaching the performance achievable when the BS is replaced by two BSs.",
author = "Huaping Liu and Fan Sun and {De Carvalho}, Elisabeth and Petar Popovski and Henning Thomsen and Yuping Zhao",
year = "2013",
doi = "10.1109/SPAWC.2013.6612009",
language = "English",
isbn = "978-1-4673-5577-3",
series = "I E E E Workshop on Signal Processing Advances in Wireless Communications. Proceedings",
publisher = "IEEE",
pages = "46 -- 50",
booktitle = "Signal Processing Advances in Wireless Communications (SPAWC), 2013 IEEE 14th Workshop on",
address = "United States",
note = "2013 IEEE 14th Workshop on Signal Processing Advances in Wireless Communications (SPAWC) ; Conference date: 16-06-2013 Through 19-06-2013",
}