On the Performance of MIMO-NOMA-Based Visible Light Communication Systems
On the Performance of MIMO-NOMA-Based Visible Light Communication Systems
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DOI：
10.1109/lpt.2017.2785964
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发表时间：
2018-02-15
影响因子：
2.6
通讯作者：
Du, Pengfei
中科院分区：
文献类型：
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作者：
Chen, Chen;Zhong, Wen-De;Du, Pengfei
在这封信中，我们应用非正交多址接入（NOMA）技术来提高基于多输入多输出（MIMO）的多用户可见光通信（VLC）系统可实现的和速率。为了确保室内基于MIMO - NOMA的VLC系统中高效且低复杂度的功率分配，首先通过利用用户的信道条件提出了一种归一化增益差功率分配（NGDPA）方法。我们通过数值模拟研究了室内基于2×2 MIMO - NOMA的多用户VLC系统的性能。所得结果表明，通过采用NOMA以及所提出的NGDPA方法，2×2 MIMO - VLC系统可实现的和速率能够得到显著提高。结果证明，在有三个用户的2×2 MIMO - VLC系统中，与采用增益比功率分配方法的NOMA相比，采用NGDPA的NOMA实现了高达29.1%的和速率提升。
In this letter, we apply the non-orthogonal multiple access (NOMA) technique to improve the achievable sum rate of multiple-input multiple-output (MIMO)-based multi-user visible light communication (VLC) systems. To ensure efficient and low-complexity power allocation in indoor MIMO-NOMA-based VLC systems, a normalized gain difference power allocation (NGDPA) method is first proposed by exploiting users' channel conditions. We investigate the performance of an indoor 2x2 MIMO-NOMA-based multi-user VLC system through numerical simulations. The obtained results show that the achievable sum rate of the 2x2 MIMO-VLC system can be significantly improved by employing NOMA with the proposed NGDPA method. It is demonstrated that NOMA with NGDPA achieves a sum rate improvement of up to 29.1% compared with NOMA with the gain ratio power allocation method in the 2 x 2 MIMO-VLC system with three users.