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Interference analysis for MIMO-OFDM based indoor visible light communication

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Abstract

Visible Light Communication (VLC) is an emerging wireless optical communication technology based on white light-emitting diode. VLC can fulfill lighting and communication needs; however, when illuminated, it produces reflections in the room, leading to a multipath effect that affects the signal quality of optical communication, thereby affecting user experience and system performance. This paper proposes a VLC system combining Multiple Input Multiple Output and Orthogonal Frequency Division Multiplexing (OFDM) using theoretical analysis. Firstly, the OFDM signal is modulated to compare the constellation distortion with the signal to noise ratio (SNR) of 25 dB and 30 dB. Experimental results show that the lower the bit error rate (BER), the more serious the distortion. Secondly, an optimal MMSE detection algorithm is proposed based on the minimum mean squared error (MMSE) signal detection algorithm and the least-squares method. Furthermore, the BER of the signal is verified by using zero forcing, MMSE and an optimized MMSE detection algorithm at the receiver of the system. The findings indicate that the optimized MMSE linear detection algorithm provides higher performance, with a BER of less than\(10^{-4}\) at 20 dB SNR. The overall experiment results illustrate that the proposed method in this work provides the system with low BER and high reliability, improving overall system performance.

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Acknowledgements

This work has been supported by the National Natural Science Foundation of China (No. 61705260) and the 2115 Talent Development Program of China Agricultural University.

Author information

Author notes

  1. Furong Zhu, Wencong Lai, Qiulian Zhang, Xinlai Liu and Wenjie Zhang are contributed equally to this work.

Authors and Affiliations

  1. College of Information and Electrical Engineering, China Agricultural University, Beijing, 100083, China

    Liwei Yang, Furong Zhu, Wencong Lai, Qiulian Zhang & Xinlai Liu

  2. Minnan Normal University, Zhangzhou, 363000, Fujian, China

    Wenjie Zhang

Authors
  1. Liwei Yang

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  2. Furong Zhu

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  3. Wencong Lai

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  4. Qiulian Zhang

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  5. Xinlai Liu

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  6. Wenjie Zhang

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Corresponding author

Correspondence toLiwei Yang.

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Appendix A: List of acronyms

Appendix A: List of acronyms

Acronyms

English Spelling

VLC

Visible Light Communication

LED

Light Emitting Diode

RF

Radio Frequency

OFDM

Orthogonal Frequency Division Multiplexing

MIMO

Multiple Input Multiple Output

SISO

Single Input Single Output

NOHO

Non-Orthogonal Hybrid Optical

SNR

Signal-to-Noise Ratio

FFT

Fast Fourier Transform

IFFT

Inverse Fast Fourier Transform

BER

Bit Error Rate

PD

Photoelectric Detector

AP

Access Point

SDM

Space Division Multiplexing

ISI

Inter-Symbol Interference

ICI

Inter-Channel Interference

CSI

Channel Status Information

CP

Cyclic Prefix

CS

Cyclic Suffix

V-BLAST

Vertical Bell laboratories layered space-time

ZF

Zero Forcing

ZF-SIC

Zero Forcin Successive Interface Cancellation

MMSE

Minimum Mean Square Error

MMSE-SIC

Minimum Mean Square Error Successive Interface Cancellation

ISIC

Iterative Successive Interface Cancellation

QPSK

Quadrature Phase Shift Keying

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Yang, L., Zhu, F., Lai, W.et al. Interference analysis for MIMO-OFDM based indoor visible light communication.J Supercomput79, 702–724 (2023). https://doi.org/10.1007/s11227-022-04656-4

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