Spatial Channel Hardening For LiFi Networks
| Autor: | Sofie Pollin, Jona Beysens, Qing Wang |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
Boosting (machine learning)
Computer science Testbed Transmitter Degrees of freedom (statistics) 020206 networking & telecommunications 02 engineering and technology Interference (wave propagation) Standard deviation 020210 optoelectronics & photonics Robustness (computer science) 0202 electrical engineering electronic engineering information engineering Algorithm Communication channel |
| Zdroj: | GLOBECOM (Workshops) |
| DOI: | 10.1109/gcwkshps50303.2020.9367478 |
| Popis: | Intrinsically, Light Fidelity (LiFi) networks are robust in both time and frequency domains. However, in the spatial domain LiFi channels vary significantly because light-emitting diode (LED) light is spatially confined to a small area. This degrades spatial robustness of LiFi networks. In this work, we exploit two spatial degrees of freedom, transmitter densification and beamsteering, in order to harden LiFi channels for spatially robust LiFi networks. Our results demonstrate that these methods can improve LiFi’s spatial robustness, defined as the standard deviation over the average channel gain, by 92% and 85%, respectively. For a more challenging multi-user LiFi network subject to inter-user interference, we further design a novel algorithm to improve the spatial robustness. Moreover, we validate the merit of our proposed methods through extensive experiments in our proof-of-concept testbed which consists 36 transmitters and 4 users. Experimental results show that the minimal signal-to-interference-plus-noise ratio can be enhanced by 7.8 dB, significantly boosting the spatial robustness. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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