An Improved Tomlinson-Harashima Precoding Based on Dynamic CSI in High-Speed Mobile Scenarios

doi:10.3969/j.issn.0372-2112.2019.06.004

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ACTA ELECTRONICA SINICA ›› 2019, Vol. 47 ›› Issue (6) : 1209-1215. DOI: 10.3969/j.issn.0372-2112.2019.06.004

An Improved Tomlinson-Harashima Precoding Based on Dynamic CSI in High-Speed Mobile Scenarios

LIAO Yong, HU Yi, YANG Xin-yi, YAO Hai-mei, ZHANG Nan

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Abstract

Aiming at the technical challenges brought about by the fast time-varying characteristics of the channel in high-speed scenes to precoding in multiple input multiple output (MIMO) system,this paper proposes an improved Tomlinson-Harashima precoding (THP) algorithm for MIMO systems based on the dynamic channel state information (CSI) model.Channel statistical information and correlations are exploited to compensate instantaneous CSI,which could reflect current real-time channel status exactly.Further,aimed at maximizing the signal to interference plus noise ratio,a multi-user scheduling algorithm based on loop traversal search is proposed.And the multi-user scheduling algorithm is applied to THP,which could improve the precoding accuracy of the traditional THP.Simulation results show that the proposed scheme can be efficiently applied to high-speed mobile scenario,and improve bit error ratio performance as well as channel capacity.

Key words

high-speed mobility / MIMO system / dynamic channel state information / Tomlinson-Harashima precoding / user scheduling / signal to noise ratio

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LIAO Yong, HU Yi, YANG Xin-yi, YAO Hai-mei, ZHANG Nan. An Improved Tomlinson-Harashima Precoding Based on Dynamic CSI in High-Speed Mobile Scenarios[J]. Acta Electronica Sinica, 2019, 47(6): 1209-1215. https://doi.org/10.3969/j.issn.0372-2112.2019.06.004

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Funding

National Natural Science Foundation of China (No.61501066); Chongqing Research Program of Basic and Frontier Technology (No.cstc2015jcyjA40003); Chongqing Postgraduate Research and Innovation Project (No.CYS18061); Fundamental Research Funds for the Central Universities (No.106112017CDJXY500001)