AI Article Synopsis
- To enhance VLC traffic capacity, the study utilizes wide bandwidth LEDs and efficient modulation techniques.
- The demonstration employed OFDM-QAM with a bit- and power-loading algorithm on a single blue LED, achieving over 1 Gbit/s capacity using a 400 MHz APD-based receiver.
- This system allows for successful data transmission in poorly illuminated indoor conditions while maintaining a wireless link length of 1 to 4 meters.
Article Abstract
To achieve higher visible light communication (VLC) traffic capacity, using the wide bandwidth light-emitting diode (LED) and spectral efficiency modulation signal, is currently the most commonly used method. In this demonstration, we apply the orthogonal frequency division multiplexing quadrature amplitude modulation (OFDM-QAM) with bit- and power-loading algorithm on single blue LED to achieve >1 Gbit/s VLC capacity, when a 400 MHz bandwidth avalanche photodiode (APD)-based receiver (Rx) is exploited for decoding. Here, the higher sensitivity APD can be applied to compensate for the wireless VLC link length in the proposed LED VLC system, and due to the lower LED illumination (255 to 40 lux), is used for the indoor access network after passing the wireless link length of 1 to 4 m. As a result, using single blue LED can achieve 0.962 to 1.057 Gbit/s OFDM rate with available 400 MHz bandwidth APD in poorly illuminated condition indoors without applying analogy equalization.
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|---|---|
| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC11596661 | PMC |
| http://dx.doi.org/10.3390/mi15111322 | DOI Listing |
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