论文标题
与通道状态不完美的混合VLC-RF网络的非正交多访问
Non-Orthogonal Multiple Access for Hybrid VLC-RF Networks with Imperfect Channel State Information
论文作者
论文摘要
目前的贡献提出了一个通用框架，用于对混合可见光通信（VLC）和射频（RF）无线系统的能效分析，其中VLC和RF子系统都利用非正交多访问（NOMA）技术。所提出的框架基于现实的通信方案，因为它考虑了用户的移动性，并假设渠道状态信息不完善（CSI）。在这种情况下，对于NOMA-VLC的相应平均总和及其正交频划分多访问（OFDMA）-VLC对应物的相应平均总和。广泛的表明，发生的CSI错误对Noma-VLC和OFDMAVLC系统的平均能源效率有很大影响，因此不应在实践设计和部署中忽略它们。有趣的是，我们进一步证明了混合NOMA-VLCRF系统的平均能源效率在不完美的CSI下优于Noma-VLC系统。相应的计算机模拟证实了提供的分析结果以及有趣的理论和实用见解，这将在有效的设计和部署常规VLC和混合VLC-RF系统的有效设计和部署中很有用。
The present contribution proposes a general framework for the energy efficiency analysis of a hybrid visible light communication (VLC) and Radio Frequency (RF) wireless system, in which both VLC and RF subsystems utilize nonorthogonal multiple access (NOMA) technology. The proposed framework is based on realistic communication scenarios as it takes into account the mobility of users, and assumes imperfect channel-state information (CSI). In this context, tractable closed-form expressions are derived for the corresponding average sum rate of NOMA-VLC and its orthogonal frequency division multiple access (OFDMA)-VLC counterparts. It is shown extensively that incurred CSI errors have a considerable impact on the average energy efficiency of both NOMA-VLC and OFDMAVLC systems and hence, they should not be neglected in practical designs and deployments. Interestingly, we further demonstrate that the average energy efficiency of the hybrid NOMA-VLCRF system outperforms NOMA-VLC system under imperfect CSI. Respective computer simulations corroborate the derived analytic results and interesting theoretical and practical insights are provided, which will be useful in the effective design and deployment of conventional VLC and hybrid VLC-RF systems.
