Optimal Linear Precodings for Multi-Color, Multi-User Visible Light Communication System with Fairness Considerations
| Autor: | Hong-Yi Yu, Zheng-Guo Sun, Dong-Fang Zhang, Yi-Jun Zhu |
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| Rok vydání: | 2018 |
| Předmět: |
multi-color visible light communication system
Mathematical optimization Optimization problem Computer science General Chemical Engineering Visible light communication 02 engineering and technology multi-color crosstalk Multi-user Luminance Precoding Inorganic Chemistry 020210 optoelectronics & photonics lcsh:QD901-999 0202 electrical engineering electronic engineering information engineering General Materials Science Chromaticity Moore–Penrose pseudoinverse Computer Science::Information Theory max-min fairness linear precoding multi-user interference 020206 networking & telecommunications Condensed Matter Physics Max-min fairness lcsh:Crystallography maximum sum-rate |
| Zdroj: | Crystals Volume 8 Issue 11 Crystals, Vol 8, Iss 11, p 404 (2018) |
| ISSN: | 2073-4352 |
| DOI: | 10.3390/cryst8110404 |
| Popis: | With fairness consideration, optimal linear precoding designs for multi-color, multi-user visible light communication (VLC) systems are presented in this paper. Utilizing both the spatial and multi-color resources, the precoding designs are proposed to mitigate the impact of the multi-user interference (MUI) and the multi-color crosstalk. With the constraints of chromaticity, luminance, and signal range, the precoding designs are formulated to achieve the max-min fairness and the maximum sum-rate. Since the closed-form expression for the capacities is not available, the lower and upper bounds are chosen as the performance criterions. To make the optimization problems be easy to be solved by using standard optimization packages, the non-convex problems are cast into convex ones. Subsequently, algorithms are developed to find optimal solutions. Extensive simulation results indicate that the proposed precoding schemes outperform the conventional pseudo inverse method. |
| Databáze: | OpenAIRE |
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