Visible light communication (VLC) has emerged as a promising technology for 5G and beyond communication networks in the last few years. In this paper, a multiple-input multiple-output (MIMO) VLC system using angular diversity receiver is proposed. In particular, the repetition coding is adopted at the transmitter and receiver diversity schemes, i.e. maximum-ratio combining (MRC), equal gain combining (EGC) and selection best combining (SBC), are adopted at the receiver for further performance enhancement. The closed-form expressions for average error probability of the proposed system are derived in the presence of imperfect channel state information (CSI). This research investigates that the increment in SNR is not sufficient to offset the effect of channel estimation error especially at high estimation error. The error performance analysis of the proposed MIMO–VLC system with and without estimation error is presented for different receiver locations and semi-half angles of the transmitting light emitting diodes (LEDs). Analytical results are verified with the simulation results.

在过去几年中，可见光通信 (VLC) 已成为 5G 及其他通信网络的有前途的技术。在本文中，提出了一种使用角度分集接收器的多输入多输出 (MIMO) VLC 系统。特别地，在发射机和接收机分集方案中采用重复编码，即在接收机采用最大比合并(MRC)、等增益合并(EGC)和选择最佳合并(SBC)以进一步提高性能。在存在不完善的信道状态信息 (CSI) 的情况下，推导出所提出系统的平均错误概率的封闭形式表达式。本研究调查了 SNR 的增量不足以抵消信道估计误差的影响，尤其是在高估计误差时。针对不同的接收器位置和发射发光二极管 (LED) 的半半角，提出了所提出的 MIMO-VLC 系统在有和没有估计误差的情况下的误差性能分析。仿真结果验证了分析结果。