Performance of a Precoding MIMO System for Decentralized Multiuser Indoor Visible Light Communications

被引：113
作者：
Hong, Yang [1 ]
Chen, Jian [1 ]
Wang, Zixiong [2 ]
Yu, Changyuan [3 ]
机构：
[1] Nanjing Univ Posts & Telecommun, Sch InfoComm Engn, Nanjing 210003, Peoples R China
[2] Hong Kong Polytech Univ, Dept Elect Engn, Kowloon, Hong Kong, Peoples R China
[3] Natl Univ Singapore, Dept Elect & Comp Engn, Singapore 117576, Singapore
来源：
IEEE PHOTONICS JOURNAL | 2013年 / 5卷 / 04期
基金：
中国国家自然科学基金;
关键词：
Visible light communication (VLC); multi-user (MU) MIMO; precoding; light-emitting diode (LED);
D O I：
10.1109/JPHOT.2013.2274766
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
This paper investigates the performance of our recently proposed precoding multiuser (MU) MIMO system in indoor visible light communications (VLC). The transmitted data of decentralized users are transmitted by light-emitting-diode (LED) arrays after precoding in a transmitter, by which the MU interference is eliminated. Thus, the complexity of user terminals could be reduced, which results in the reduction of power consumption. The limitation of block diagonalization precoding algorithm in VLC systems is investigated. The corresponding solution by utilizing optical detectors with different fields of view (FOV) is derived, and the impact of FOV to the proposed system is also analyzed. In this paper, we focus on BER and signal-to-noise-ratio performances of the proposed system with the consideration of the mobility of user terminals. Simulation results show that the majority of the indoor region can achieve 100 Mb/s at a BER of 10(-6) when single LED chip's power is larger than 10 mW.
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页数：11
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