RFVLC Communication: Advantages and Disadvantages
vlc
visible light
communication
lifi
wireless
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This article explores the pros and cons of Visible Light Communication (VLC). It highlights the benefits and drawbacks of VLC communication.
What is VLC? (Visible Light Communication)
Introduction:
- VLC utilizes light as the medium for communication between a source and a receiver.
- It has various applications, including underwater communication, in-flight communication inside airplanes, vehicle-to-vehicle communication, and indoor broadcast systems for internet access (LiFi).
- VLC uses wavelengths between 380 nm and 750 nm (430 THz to 790 THz) for data transmission.
- Data is modulated onto the light, usually emitted by LED sources.
- The receiver employs a photodiode to recover the data.
- A Line-of-Sight (LOS) connection between the source and receiver is essential for VLC to function correctly.
Figure 1: Li-Fi internet architecture example.
Benefits (Advantages) of VLC Communication
Here are some advantages of VLC communication:
- Higher Bandwidth: Supports larger bandwidths, overcoming the limitations of RF communication.
- Secured Communication: VLC communication within a room cannot be intercepted from another room, unlike RF communication.
- Power Efficient: VLC sources are used for both illumination and communication, resulting in low power consumption.
- EM Radiation Immunity: Unaffected by electromagnetic radiation from RF systems.
- Safe for Humans: Poses no known health risks to human beings.
- Easy Installation: Simple to install.
Drawbacks (Disadvantages) of VLC Communication
Here are some disadvantages of VLC communication:
- Interference: Susceptible to interference from ambient light sources.
- Short Range: Limited coverage range.
- Integration Challenges: Integrating VLC with existing Wi-Fi systems can be challenging.
- Environmental Factors: Atmospheric absorption, shadowing, and beam dispersion can negatively impact performance.
- Line-of-Sight Requirement: Requires a direct line of sight between the source and receiver, making non-LOS communication difficult.
