Dec 12, 2023 10:56 PM
https://spectrum.ieee.org/li-fi-better-than-wi-fi
EXCERPTS: The recent adoption of IEEE 802.11bb has launched light fidelity, or Li-Fi, which opened the door into an era of wireless communication for advanced Wi-Fi technologies. Li-Fi enables Wi-Fi to use light waves instead of radio waves to transmit and receive data.
IEEE 802.11bb defines the rules for how Li-Fi devices will communicate with each other and how fast they can transfer data. According to the standard, such devices should be able to send and receive data at speeds between 10 megabits per second and 9.6 gigabits per second.
The standard introduces a new realm of fast, reliable wireless communication that promises to revolutionize the way we connect and communicate.
Li-Fi uses special light fixtures that have small control units and solid-state light emitters and photosensitive receivers. The fixtures can send and receive information using light waves. To connect to Li-Fi, smartphones, tablets, and other devices need emitters and sensors that can send and see the light signals. Advanced mobile phones already use the emitters and sensors for other applications such as face recognition and lidar.
[...] One of the key factors driving the adoption of Li-Fi is that it enables peak rates by using the same advanced modulation techniques to encode data onto light waves that are used for Wi-Fi. The optical wireless transmission channel is less disturbed by multipath, Doppler, phase noise, and other interference. Therefore, it can realize the highest speeds through a variant of multicarrier modulation, called orthogonal frequency division multiplexing.
OFDM implements subcarriers transmitting multiple parallel data streams. By leveraging the properties of light, Li-Fi results in unprecedented data transfer speeds over short distances typically inside one room... (MORE - missing details)
EXCERPTS: The recent adoption of IEEE 802.11bb has launched light fidelity, or Li-Fi, which opened the door into an era of wireless communication for advanced Wi-Fi technologies. Li-Fi enables Wi-Fi to use light waves instead of radio waves to transmit and receive data.
IEEE 802.11bb defines the rules for how Li-Fi devices will communicate with each other and how fast they can transfer data. According to the standard, such devices should be able to send and receive data at speeds between 10 megabits per second and 9.6 gigabits per second.
The standard introduces a new realm of fast, reliable wireless communication that promises to revolutionize the way we connect and communicate.
Li-Fi uses special light fixtures that have small control units and solid-state light emitters and photosensitive receivers. The fixtures can send and receive information using light waves. To connect to Li-Fi, smartphones, tablets, and other devices need emitters and sensors that can send and see the light signals. Advanced mobile phones already use the emitters and sensors for other applications such as face recognition and lidar.
[...] One of the key factors driving the adoption of Li-Fi is that it enables peak rates by using the same advanced modulation techniques to encode data onto light waves that are used for Wi-Fi. The optical wireless transmission channel is less disturbed by multipath, Doppler, phase noise, and other interference. Therefore, it can realize the highest speeds through a variant of multicarrier modulation, called orthogonal frequency division multiplexing.
OFDM implements subcarriers transmitting multiple parallel data streams. By leveraging the properties of light, Li-Fi results in unprecedented data transfer speeds over short distances typically inside one room... (MORE - missing details)