Linear Precoding Designs for MIMO VLC Using Multi-Color LEDs under Multiple Lighting Constraints

Author:

Xiao Ye,Zhu Yi-JunORCID,Sun Zheng-Guo

Abstract

Multiple-input multiple-output (MIMO) technology as an efficient approach to improve the transmission rate in visible light communication (VLC) has been well studied in recent years. In this paper, we focus on the MIMO VLC system using multi-color LEDs in the typical indoor scenario. Besides the correlation of the MIMO channel, the multi-color crosstalk interference and quadrangle chromaticity region are also considered to increase the practicality of this system. With the constraints of power, amplitude and chromaticity, an iterative algorithm to minimize mean-squared-error (MSE) is proposed to jointly design the precoder and equalizer. Our proposed algorithm provides an effective method to get the optimal precoder by updating optimization variables iteratively. As the equalizer matrix is fixed at each iteration, the main non-convex precoding design problem is transformed into a convex optimization problem and then solved. With the utilization of multi-color LEDs, our proposed precoding method would be promising to promote the practical applications of high-speed indoor optical wireless communication. Simulation results show that our proposed method owns better performance than conventional chromaticity-fixed schemes and zero-forcing precoding designs.

Funder

National Natural Science Foundation of China

Publisher

MDPI AG

Subject

Inorganic Chemistry,Condensed Matter Physics,General Materials Science,General Chemical Engineering

Cited by 5 articles. 订阅此论文施引文献 订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献

1. Integrated sensing, lighting and communication based on visible light communication: A review;Digital Signal Processing;2024-02

2. Performance of MMSE-LE in 2 Gbaud/s Single Carrier Visible Light Communication using PAM-2;2022 13th International Symposium on Communication Systems, Networks and Digital Signal Processing (CSNDSP);2022-07-20

3. Multi-User Precoder Designs for RGB Visible Light Communication Systems;Sensors;2020-11-29

4. Advanced LED Solid-State Lighting Optics;Crystals;2020-08-27

5. Hybrid multiplexing in OFDM-based VLC systems;2020 IEEE Wireless Communications and Networking Conference (WCNC);2020-05

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