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VLC vs Wifi | Difference between VLC and Wifi

This page compares VLC vs Wifi and describes difference between VLC and Wifi wireless technologies.


Specifications VLC WiFi
Full form Visible Light Communication Wireless Fidelity
Maturity of system Less More
Speed 1Gbps 1Gbps
Coverage Range short (few meters) Higher (tens of meters)
External Power Do not require external power as it has power for LED lamp. Need external power
Backhaul Ethernet or powerline communication is used. It is provided using ethernet or broadband connection.
RF and Antenna Front end Do not required, moreover illumination power is used as transmit power. Required, as wifi operates using EM waves.
Security More secure as it confines the data transmission to one area. Less secure as EM waves can not be confined to one particular region, Separate encryption techniques are to be employed in order to make wifi connection more robust.
Data density/Frequency re-use Interference is bounded and hence reuse efficiency is higher. WiFI prone to co-channel interference and hence more wifi nodes do not lead to increase in the data capacity linearly as it can be.
NLOS performance communication can not be established in non line of sight if reflected signal is poor. communication is possible but performance gets degraded if attenuation is more due to signal fading.
BOM (i.e. Bill of Materials) Do not require expensive components such as RF devices and antenna. It is cheaper system. RF and antenna are must for wifi to be exist. Hence it is costly compare to VLC.

The table above provides comparison between VLC and Wifi wireless technologies. From these one can derive conclusion about VLC and Wifi technologies based on application of use.


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