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引用次数: 27
摘要
本文研究了在非直接视距(LOS)特征的室内场景下，用于可见光通信(VLC)的重复码(RC)和空间复用(SMP)的性能。在典型的5 m × 5 m × 3 m房间内，以4台发射机的VLC MIMO系统为例，通过仿真研究了接收机在房间内移动时的误码率分布。对于不同的发射机距离，系统性能不满足要求的误码率水平的归一化区域给出了说明。RC和SMP的最佳发射机间距分别为1.5 m和3.5 m。对比RC和SMP，结果表明RC在低频谱效率下优于SMP。然而，在相对较高的频谱效率下，RC的性能并不好，因为它需要非常高的星座规模，而具有空间复用增益的SMP可以提供更好的性能。
Performance analysis of indoor MIMO visible light communication systems
In this paper, we study the performance of Repetition Code (RC) and Spatial Multiplexing (SMP) applied to Visible Light Communication (VLC) in indoor scenarios with non-direct line-of-sight (LOS) characteristics. Considering a VLC MIMO system with 4 transmitters within a typical 5 m × 5 m × 3 m room, by means of simulation, we investigate the distribution of Bit-error-rate (BER) when the receiver moves around the room. For various transmitter separations, the normalized area at which the system performance does not satisfy a required BER level is illustrated. The optimal values of transmitter separation for RC and SMP are 1.5 m and 3.5 m, respectively. Comparing between RC and SMP, the results show that RC outperforms SMP at low spectral efficiency. However, at relatively high spectral efficiency RC does not perform well since it requires a very high constellation size, while SMP with its spatial multiplexing gain can offer a much better performance.
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