Title: A novel spatial Tomlinson-Harashima precoding scheme in multi-user MIMO broadcast channels

Authors: Zufan Zhang; Yinxue Yi; Jing Yang

Addresses: School of Communications and Information Engineering, Chongqing University of Posts and Telecommunications, Chongqing 400065, China. ' School of Communications and Information Engineering, Chongqing University of Posts and Telecommunications, Chongqing 400065, China. ' Science & Technology Division, Chongqing University of Posts and Telecommunications, Chongqing 400065, China

Abstract: Spatial Tomlinson-Harashima Precoding (STHP) is a promising transmission technique that can mitigate Inter-User Interferences (IUI) in a multi-user Multiple Input Multiple Output broadcast channel. However, traditional STHPs cannot guarantee user fairness that is supposed to be a desirable feature for future wireless communication systems. This paper proposes an improved STHP transceiver structure. It is based on zero-forcing criterion and has the perfect user fairness. In addition to this, we also derive an elegant ordering method that can significantly improve the system performance.

Keywords: STHP; spatial Tomlinson-Harashima precoding; user fairness; multi-user MIMO broadcast channels; ordering; interference; wireless communications.

DOI: 10.1504/IJWMC.2012.046781

International Journal of Wireless and Mobile Computing, 2012 Vol.5 No.2, pp.137 - 143

Received: 17 Dec 2011
Accepted: 24 Dec 2011

Published online: 07 May 2012 *

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