In the present paper, the bit error rate (BER) performance of hybrid power line communication (PLC) and multiple-input multiple-output (MIMO) visible light communication (VLC) system (HPMV) has been investigated using line-of-sight (LOS) and LOS plus first reflection (L-R1) signals for room size of 5 m × 5 m × 3 m (configuration A) and 7.5 m × 7.5 m × 3.5 m (configuration B). In the work, Rayleigh fading and Barry channel models have been considered for PLC and VLC channels respectively. The BER has been analysed by varying separations between LEDs as 0.2 m, 0.6m and 1m for both configurations. The results show that the BER for LOS and L-R1 signals decreases upto optimal separation of 0.6 m for configuration A. However, the result indicates that the required optimal separation for configuration B is more than configuration A. The channel frequency response of MIMO-VLC and HPMV system has been inspected and it supports the results of BER simulation. It has been found that, with increase in spatial separation between LEDs, the deep notches and attenuation in the frequency response of MIMO-VLC system decrease. The overall investigation shows that even though OFDM is resilient to frequency selective fading, an optimum separation between LEDs must be chosen according to the room size for the HPMV system.

中文翻译：

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基于OFDM的集成PLC和MIMO-VLC系统的BER性能分析

在本文中，使用视线研究了混合电力线通信（PLC）和多输入多输出（MIMO）可见光通信（VLC）系统（HPMV）的误码率（BER）性能。 （LOS）和LOS加上第一反射（L-R1）信号，用于5 m×5 m×3 m（配置A）和7.5 m×7.5 m×3.5 m（配置B）的房间。在工作中，分别考虑了PLC和VLC信道的瑞利衰落和Barry信道模型。通过将两种配置的LED之间的间距分别更改为0.2 m，0.6 m和1m来分析BER。结果表明，LOS和L-R1信号的BER减小，直到配置A的最佳间隔为0.6 m。但是，结果表明，配置B所需的最佳间隔大于配置A。已经检查了MIMO-VLC和HPMV系统的信道频率响应，并支持BER仿真的结果。已经发现，随着LED之间的空间间隔的增加，MIMO-VLC系统的深陷波和频率响应的衰减减小。总体研究表明，即使OFDM能够抵抗频率选择性衰落，也必须根据HPMV系统的房间大小选择LED之间的最佳间隔。