Real-Time Implementation of Hybrid Visible Light/Infrared Communications Supporting Full-Range Dynamic Dimming Control
Implementing dimming control in visible light communication (VLC) systems often involves a trade-off that reduces data rates. To address this, we propose a hybrid visible light (VL)/Infrared (IR) communication scheme that leverages pulse amplitude modulation (PAM) symbols in both VL and I...
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| Format: | Article |
| Language: | English |
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IEEE
2024-01-01
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| Series: | IEEE Photonics Journal |
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| Online Access: | https://ieeexplore.ieee.org/document/10399782/ |
| _version_ | 1797335601193680896 |
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| author | Shixin Liu Xiaodi You Jian Chen Changyuan Yu Chaoran Xiong Mingyi Gao Gangxiang Shen |
| author_facet | Shixin Liu Xiaodi You Jian Chen Changyuan Yu Chaoran Xiong Mingyi Gao Gangxiang Shen |
| author_sort | Shixin Liu |
| collection | DOAJ |
| description | Implementing dimming control in visible light communication (VLC) systems often involves a trade-off that reduces data rates. To address this, we propose a hybrid visible light (VL)/Infrared (IR) communication scheme that leverages pulse amplitude modulation (PAM) symbols in both VL and IR spectra, alternating them within pulse width modulation (PWM) “ON” and “OFF” slots. By efficiently using PWM “OFF” slots, the achievable data rate drop due to dimming is mitigated without affecting illumination. To ensure synchronization during the switch between VL and IR links, we design real-time dimming control state machines at both ends of the link, enhancing link stability. Additionally, we develop an adaptive hybrid frame structure that dynamically adjusts the length of transmitted information as the duty cycle continuously changes, ensuring uninterrupted communication. Experimental results from implementation using field-programmable gate arrays (FPGA) demonstrate real-time transmission under precise full-range dimming control, dynamically ranging from 1 to 0 with a resolution of 0.0053, maintaining a consistent 10 Mb/s data rate at bit error rates (BERs) lower than 3.4 × 10<sup>−4</sup> and 20 Mb/s at BERs lower than 7.0 × 10<sup>−3</sup> within a link range of 0.53 m without light concentration at the transmitter. Compared to baseline VLC, our system achieves a 100% data rate improvement at a duty cycle of 0.5, and supports stable data transmission even in low-light conditions. |
| first_indexed | 2024-03-08T08:39:36Z |
| format | Article |
| id | doaj.art-b49664ad003b42e58d39fd298f4b5b17 |
| institution | Directory Open Access Journal |
| issn | 1943-0655 |
| language | English |
| last_indexed | 2024-03-08T08:39:36Z |
| publishDate | 2024-01-01 |
| publisher | IEEE |
| record_format | Article |
| series | IEEE Photonics Journal |
| spelling | doaj.art-b49664ad003b42e58d39fd298f4b5b172024-02-02T00:00:31ZengIEEEIEEE Photonics Journal1943-06552024-01-0116111410.1109/JPHOT.2024.335377610399782Real-Time Implementation of Hybrid Visible Light/Infrared Communications Supporting Full-Range Dynamic Dimming ControlShixin Liu0https://orcid.org/0009-0006-3481-4864Xiaodi You1https://orcid.org/0000-0002-2085-4578Jian Chen2https://orcid.org/0000-0001-5685-2139Changyuan Yu3https://orcid.org/0000-0002-3185-0441Chaoran Xiong4https://orcid.org/0009-0000-2697-6624Mingyi Gao5https://orcid.org/0000-0001-5935-1225Gangxiang Shen6https://orcid.org/0000-0002-7342-6980School of Electronic and Information Engineering, Soochow University, Suzhou, ChinaSchool of Electronic and Information Engineering, Soochow University, Suzhou, ChinaSchool of Telecommunications and Information Engineering, Nanjing University of Posts and Telecommunications, Nanjing, ChinaPhotonics Research Institute, Department of Electrical and Electronic Engineering, The Hong Kong Polytechnic University, Kowloon, Hong KongSchool of Electronic and Information Engineering, Soochow University, Suzhou, ChinaSchool of Electronic and Information Engineering, Soochow University, Suzhou, ChinaSchool of Electronic and Information Engineering, Soochow University, Suzhou, ChinaImplementing dimming control in visible light communication (VLC) systems often involves a trade-off that reduces data rates. To address this, we propose a hybrid visible light (VL)/Infrared (IR) communication scheme that leverages pulse amplitude modulation (PAM) symbols in both VL and IR spectra, alternating them within pulse width modulation (PWM) “ON” and “OFF” slots. By efficiently using PWM “OFF” slots, the achievable data rate drop due to dimming is mitigated without affecting illumination. To ensure synchronization during the switch between VL and IR links, we design real-time dimming control state machines at both ends of the link, enhancing link stability. Additionally, we develop an adaptive hybrid frame structure that dynamically adjusts the length of transmitted information as the duty cycle continuously changes, ensuring uninterrupted communication. Experimental results from implementation using field-programmable gate arrays (FPGA) demonstrate real-time transmission under precise full-range dimming control, dynamically ranging from 1 to 0 with a resolution of 0.0053, maintaining a consistent 10 Mb/s data rate at bit error rates (BERs) lower than 3.4 × 10<sup>−4</sup> and 20 Mb/s at BERs lower than 7.0 × 10<sup>−3</sup> within a link range of 0.53 m without light concentration at the transmitter. Compared to baseline VLC, our system achieves a 100% data rate improvement at a duty cycle of 0.5, and supports stable data transmission even in low-light conditions.https://ieeexplore.ieee.org/document/10399782/Visible light communication (VLC)infrared (IR) communicationdimming controlpulse width modulation (PWM)field-programmable gate arrays (FPGA) |
| spellingShingle | Shixin Liu Xiaodi You Jian Chen Changyuan Yu Chaoran Xiong Mingyi Gao Gangxiang Shen Real-Time Implementation of Hybrid Visible Light/Infrared Communications Supporting Full-Range Dynamic Dimming Control IEEE Photonics Journal Visible light communication (VLC) infrared (IR) communication dimming control pulse width modulation (PWM) field-programmable gate arrays (FPGA) |
| title | Real-Time Implementation of Hybrid Visible Light/Infrared Communications Supporting Full-Range Dynamic Dimming Control |
| title_full | Real-Time Implementation of Hybrid Visible Light/Infrared Communications Supporting Full-Range Dynamic Dimming Control |
| title_fullStr | Real-Time Implementation of Hybrid Visible Light/Infrared Communications Supporting Full-Range Dynamic Dimming Control |
| title_full_unstemmed | Real-Time Implementation of Hybrid Visible Light/Infrared Communications Supporting Full-Range Dynamic Dimming Control |
| title_short | Real-Time Implementation of Hybrid Visible Light/Infrared Communications Supporting Full-Range Dynamic Dimming Control |
| title_sort | real time implementation of hybrid visible light x002f infrared communications supporting full range dynamic dimming control |
| topic | Visible light communication (VLC) infrared (IR) communication dimming control pulse width modulation (PWM) field-programmable gate arrays (FPGA) |
| url | https://ieeexplore.ieee.org/document/10399782/ |
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