Energy- vs Spectral-Efficiency for Energy-Harvesting Hybrid RF/VLC Networks
Energy- vs Spectral-Efficiency for Energy-Harvesting Hybrid RF/VLC Networks
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DOI：
10.1109/ieeeconf51394.2020.9443343
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发表时间：
2020-11
期刊：
影响因子：
--
通讯作者：
Yavuz Yapıcı;Ismail Güvenç
中科院分区：
文献类型：
--
作者：
Yavuz Yapıcı;Ismail Güvenç
我们考虑一个混合的射频（RF）/可见光通信（VLC）的情况下，RF链路的VLC传输过程中收获的能量授权。我们考虑到接入点（AP），这是由发光二极管（LED）的功耗，而它是通过一个两跳的混合RF/VLC链路与远用户进行通信。特别是，我们考虑了端到端网络的能量效率，通过选择最佳的直流（DC）偏置来提高能量收集性能，这在现有文献中被忽略了。为此，我们对市售LED的能量消耗进行建模，并制定了一个联合的能量和频谱效率优化问题。分别优化能量和频谱效率的极端情况强调了针对给定的联合（多目标）优化问题优化DC偏置的重要性。
We consider a hybrid radio frequency (RF) / visible light communications (VLC) scenario where the RF link is empowered by the energy harvested during the VLC transmission. We take into account the power consumption of the access point (AP), which is composed of light emitting diodes (LEDs), while it is communicating with a far user over a two-hop hybrid RF/VLC link. In particular, we consider the energy efficiency of the end-to-end network in enhancing the energy-harvesting performance by choosing the optimal direct current (DC) bias, which is overlooked in the existing literature. To this end, we model the energy consumption of the commercially available LEDs, and formulate a joint energy- and spectral-efficiency optimization problem. The extreme cases of optimizing energy and spectral efficiency individually underscores the importance of optimizing the DC bias for a given joint (multi-objective) optimization problem.