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

  • Authors:
  • Zufan Zhang;Yinxue Yi;Jing Yang

  • Affiliations:
  • 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

  • Venue:
  • International Journal of Wireless and Mobile Computing
  • Year:
  • 2012

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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.