Visible light communication is a method of transmitting data through the use of visible light waves. This technology utilizes light-emitting diodes (LEDs) to transmit data, which can then be received by specialized receivers.
Modulation schemes in VLC refer to the different methods used to encode data onto the visible light waves. These schemes include on-off keying (OOK), pulse amplitude modulation (PAM), and frequency shift keying (FSK), among others.
VLC offers several advantages over traditional wireless communication methods, including higher data rates, increased security, and reduced interference from other wireless signals. It also does not require additional infrastructure as it can utilize existing lighting systems.
One of the main challenges of implementing VLC is the limitation of range due to the short range of visible light. Additionally, obstacles and environmental factors such as sunlight, shadows, and reflections can affect the quality of the communication. There may also be regulatory challenges in some countries regarding the use of visible light for communication purposes.
VLC has a wide range of potential applications, including indoor positioning and navigation, wireless internet access, and machine-to-machine communication. It can also be used in environments where radio frequency (RF) signals are restricted, such as hospitals or aircraft cabins.