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General Information
Editor-in-chief

Prof. Pascal Lorenz
University of Haute Alsace, France
 
It is my honor to be the editor-in-chief of IJFCC. The journal publishes good papers in the field of future computer and communication. Hopefully, IJFCC will become a recognized journal among the readers in the filed of future computer and communication.

IJFCC 2014Vol.3(6): 421-426 ISSN: 2010-3751
DOI: 10.7763/IJFCC.2014.V3.340

A SVD-Based Optical MIMO Precoding Scheme in Indoor Visible Light Communication

Qing-Feng Liu, Shuai-Fang Xiao, Kai-Zhi Huang, and Zhou Zhong
Abstract—A novel optical precoding scheme based on singular value decomposition (SVD) is proposed to solve the problem that strong channel correlation causes low spatial multiplexing gain in indoor visible light MIMO communication. This scheme first ensures a nonnegative signal after precoding through mapping the transmit bits into a specific symbol constellation. Then it eliminates the inter-channel interference by decomposing the MIMO channel through SVD. Finally, it reduces the BER by optimally allocating power among the sub-channels with the object to make the condition of each sub-channel equal. The simulation results show that SVD-based optical precoding scheme can significantly reduce the BER compared to ZF algorithm. And with the enhancement of channel correlation, the BER performance remains in a relatively low level, so it can obtain high spatial multiplexing gain under the strong correlation channel.

Index Terms—Indoor visible light communication, optical MIMO, precoding, SVD, power allocation.

Shuai-Fang Xiao is with the National Digital Switching System Engineering & Technological Research Center, Zhengzhou 450002, China (e-mail: xiaoshuaifang@gmail.com).
Qing-Feng Liu, Kai-Zhi Huang, and Zhou Zhong are with the National Digital Switching System Engineering & Technological Research Center, Zhengzhou 450002, China.

[PDF]

Cite: Qing-Feng Liu, Shuai-Fang Xiao, Kai-Zhi Huang, and Zhou Zhong, "A SVD-Based Optical MIMO Precoding Scheme in Indoor Visible Light Communication," International Journal of Future Computer and Communication vol. 3, no. 6, pp. 421-426, 2014.

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