Reflecting the Light: Energy Efficient Visible Light Communication with Reconfigurable Intelligent Surface
| Autor: | Ming Chen, Zhaohui Yang, Binghao Cao, Jingwen Zhao, Mingzhe Chen, Minghui Zhang |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
Mathematical optimization
Computer science 05 social sciences Visible light communication 050801 communication & media studies 020206 networking & telecommunications 02 engineering and technology Maximization Power (physics) Matrix (mathematics) 0508 media and communications Telecommunications link 0202 electrical engineering electronic engineering information engineering Interior point method Efficient energy use Power control |
| Zdroj: | VTC-Fall |
| DOI: | 10.1109/vtc2020-fall49728.2020.9348585 |
| Popis: | This paper investigates the energy efficiency maximization problem in a downlink reconfigurable intelligent surface (RIS) assisted visible light communication (VLC) system. The energy efficiency maximization problem is formulated via jointly optimizing time allocation, power control, phase shit matrix under the unique power constraints in VLC. To solve this non-convex energy efficiency maximization problem, the original problem is first simplified to an equivalent problem with a smaller number of variables. Then, an alternating algorithm with low complexity is accordingly proposed to obtain a suboptimal solution via iteratively solving the joint time allocation and power control subproblem, and the phase shift matrix adjustment subproblem. The simulation results show that the proposed algorithm can achieve up to 0.127dB gain in terms of energy efficiency compared to the conventional interior point method. |
| Databáze: | OpenAIRE |
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