On the performance of MU-MIMO indoor visible light communication system based on THP algorithm

Jian Chen, Ningning Ma, Yang Hong, Changyuan Yu

Research output: Chapter in book / Conference proceedingConference article published in proceeding or bookAcademic researchpeer-review

Abstract

Multiple input and multiple output (MIMO) technique offers advantage of high data rate parallel transmission for indoor visible light communication (VLC) systems. As multiple decentralized user terminals are generally employed in typical indoor environment, the main difficulty for multi-user MIMO indoor VLC systems lies in the separation of data for different user terminals. We have proposed a linear precoding multi-user (MU) MIMO indoor VLC system to eliminate multi-user interference (MUI), by utilizing block diagonalization (BD) algorithm. However, nonlinear Tomlinson-Harashima precoding (THP) algorithm is generally considered as much better scheme in a practical MIMO system. Besides, channel capacity based on THP algorithm is better than that of BD precoding algorithm. Therefore, in this paper, we utilize THP optimization scheme to eliminate MUI in MU-MIMO indoor VLC system. The performances of conventional THP algorithm and THP optimization scheme in VLC systems are investigated. In addition, based on the limitation analysis of THP algorithm in VLC system, optical detectors with different fields of view (FOV) are utilized to further improve system performance. Numerical simulation results show that nonlinear precoding based on THP algorithm can achieve better BER performance than that with linear BD precoding.
Original languageEnglish
Title of host publication2014 IEEE/CIC International Conference on Communications in China, ICCC 2014
PublisherIEEE
Pages136-140
Number of pages5
ISBN (Electronic)9781479941469
DOIs
Publication statusPublished - 1 Jan 2015
Externally publishedYes
Event2014 IEEE/CIC International Conference on Communications in China, ICCC 2014 - Shanghai, China
Duration: 13 Oct 201415 Oct 2014

Conference

Conference2014 IEEE/CIC International Conference on Communications in China, ICCC 2014
CountryChina
CityShanghai
Period13/10/1415/10/14

Keywords

  • Multiuser MIMO
  • THP optimization
  • Tomlinson-Harashima precoding
  • Visible light communications

ASJC Scopus subject areas

  • Computer Networks and Communications

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