Howtosignalprocessing
- What is LED modulation?
- What is visible light communication system?
- What is modulation bandwidth in LED?
- What is VLC in Li-Fi?
What is LED modulation?
LED Modulation
Since the light ouput from an LED has a region where it is linearly proportional to the forward current through the diode, it is useful for producing a light level which is proportional to some signal. That signal can then be send through a fiber optic cable and detected on the other end.
What is visible light communication system?
In telecommunications, visible light communication (VLC) is the use of visible light (light with a frequency of 400–800 THz/wavelength of 780–375 nm) as a transmission medium. VLC is a subset of optical wireless communications technologies.
What is modulation bandwidth in LED?
The modulation bandwidth of an LED chip is limited by the resistance–capacitance (RC) time constant and carrier spontaneous emission rate [3]. Therefore, the methods to increase the modulation bandwidth mainly include decreasing the RC time constant [4,5,6] and the carrier lifetime [7,8].
What is VLC in Li-Fi?
LiFi is based on Visual Light Communication (VLC) that using light emitting diodes (LEDs) to fully networked wireless system [1]. LiFi enables the electronic device to connect to the internet with no wire.
