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Multiple-LED Complex Modulation Schemes for Indoor MIMO VLC Systems

机译：室内MIMO VLC系统的多LED复杂调制方案

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摘要

In this paper, two complex modulation schemes suited for use in multiple-input multiple-output (MIMO) visible light communication (VLC) systems are proposed and their performance investigated. The proposed schemes are quadrature spatial modulation (QSM) and dual mode index modulation (DMIM) with a dual-LED complex modulator (DCM) used as the basic building block (termed as DCM block) to transmit complex modulation symbols. The proposed schemes, referred to as QSM-DCM and DMIM-DCM schemes, do not require Hermitian symmetry operation to transmit complex modulation symbols. The proposed schemes are shown to achieve enhanced rates and good performance in indoor MIMO VLC settings. Compared to spatial modulation DCM (SM-DCM) scheme known in the recent literature, the proposed schemes achieve significantly better performance. Results show that, at a bit error rate of 10-5, performance gains up to 10.2 dB and 7.4 dB can be achieved using the proposed QSM-DCM and DMIM-DCM schemes, respectively. Also, the spatial performance investigation indicates that the proposed schemes outperform the SM-DCM scheme for most of the receiver locations across the room.
机译：在本文中，提出了适用于多输入多输出（MIMO）可见光通信（VLC）系统的两种复杂调制方案，并研究了它们的性能。所提出的方案是正交空间调制（QSM）和双模索引调制（DMIM），其具有双LED复模调制器（DCM）用作基本构建块（称为DCM块）以传输复杂调制符号。所提出的方案称为QSM-DCM和DMIM-DCM方案，不需要密封对称操作来传输复杂的调制符号。所提出的方案显示在室内MIMO VLC设置中实现了增强的速率和良好性能。与最近文献中已知的空间调制DCM（SM-DCM）方案相比，所提出的方案达到了更好的性能。结果表明，以误码率为10 -5 ，可以使用所提出的QSM-DCM和DMIM-DCM方案来实现高达10.2dB和7.4 dB的性能提升。此外，空间性能调查表明，所提出的方案优于整个房间的大多数接收器位置的SM-DCM方案。

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