Applications of visible light communication
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The attached narrated power point presentation mentions the basic applications of Visible Light Communications (VLC). The material will be useful for KTU final year students who prepare for the subject EC 405, Optical Communications.
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- HALO Network would combine advantages of terrestrial and satellite networks by using airplanes stationed at high altitudes as central hubs.
- The network would use multiple beam antennas on airplanes to provide coverage to ground cells over a large area of up to 3000 square miles.
- The system is proposed to provide broadband services like internet, telephony, broadcasting to customers using low-cost user terminals with minimal power requirements.
- Benefits listed are large coverage
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This document summarizes marine radio communication procedures in Australia. It outlines that maritime communication stations in Wiluna and Charleville monitor distress frequencies on HF radio and do not monitor MF, VHF, or 27 MHz frequencies. Coast radio stations operated by states and territories provide HF and VHF coverage up to 200 nautical miles offshore. They monitor distress frequencies on HF and VHF 16, and broadcast navigation warnings and weather reports. Proper radio channels and procedures are described for distress, safety, routine calls, and ship to ship communication.
An Overview of Marine VHF Radio
Marine VHF radio is one such instrument that is in use for decades to avoid collision in sea and direct vessels in the right direction. These radios are used as an aid to keep you on the right track and call for aid when in distress. These radios operate on very high frequencies i.e. between 156 MHz to 162 MHz dedicated for marine communication. For further information about marine vhf radios visit: http://www.sailradios.com/Marine-Communication-VHF-Radios-s/1825.htm
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An explanation about Visible light communication. Which sort of Problems and challenges are there to perform communication through Visible Light.
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This document provides an overview of LiFi and Network on Chips (NoC). It introduces LiFi as a wireless technology that uses light from LED bulbs to transmit data. Potential applications of LiFi include use in homes, offices, hospitals and vehicles. Challenges of LiFi include issues with shadowing and maintaining connectivity while moving between light sources. NoC is introduced as a way to connect numerous processor cores on a single chip as chip complexity increases. Different NoC topologies like mesh, torus and fat tree are described that address on-chip communication and scaling challenges.
Lifi(seminar)
This presentation is on light fidelity(lifi). The contents include working, application, and future scope etc.
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This document discusses Li-Fi, a wireless optical networking technology that uses light-emitting diodes (LEDs) for data transmission. Li-Fi can transmit data at up to 100 times faster speeds than Wi-Fi. It provides more secure, available, and efficient data transmission without interference limitations compared to RF-based wireless technologies. Li-Fi works by varying the intensity of LED light bulbs faster than the human eye can detect to transmit digital data. Potential applications of Li-Fi include use in environments sensitive to electromagnetic interference like hospitals, underwater and aircraft communications, and location-based services.
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Applications of visible light communication
- 1. 1 Applications of Visible Light Communication MEC
- 2. 2 Contents • Introduction • VLC Applications. - Use of Li-Fi Technology. - Vehicle to Vehicle Communications. - Underwater Communications. - In Hospitals. - Information Signboards. - Visible Light ID System. - Sound Communication Systems. - Wireless LANs.
- 3. 3 VLC Applications • VLC uses the range of frequencies from 430 THz to 790 THz. • Inherent features of VLC include high bandwidth, no health hazard, low power consumption and non-licensed channels. • Applications in Li-Fi, vehicle and underwater communications, visible light identification systems, wireless LAN, sound communications etc.
- 4. 4 Li-Fi • In 2011, Prof. Harald Haas coined the term Light Fidelity (Li-Fi). • A high speed bi-directional fully connected, visible light wireless communication system analogous to Wi-Fi. • Wi-Fi have the problem of interference with other RF signals, interference with pilot navigational equipment signals in aircrafts. • Better solution in areas sensitive to electromagnetic radiation (such as aircrafts, hospitals etc.).
- 5. 5 Li-Fi • Lends support to the Internet of Things (IoT). • LI-Fi speeds up to 10 Gbits/s, 250 times more than speed of super-fast broadband. • Can share the load of Wi-Fi. • More secure than Wi-Fi.
- 6. 6 Vehicle to Vehicle Communication • For vehicular communication in the presence of vehicle lights and the existing traffic light infrastructure. • Requires reliable reachability and extremely low allowable latency in the vehicle safety communications. • VLC for cooperative forward collision warning, pre-crash sensing, emergency electronic brake lights, lane change warning, stop sign movement assistant, left turn assistant, traffic signal violation warning and curve speed warning.
- 7. 7 Vehicle to Vehicle Communication • Outdoor VLC system using Controller Area Network (CAN) with back lights and headlights for communication. • Light fast in air, faster traffic control and detection of traffic violations.
- 8. 8 Vehicle to Vehicle Communication
- 9. 9 Underwater communication • RF waves do not travel well in sea water because of its good conductivity, hence VLC. • Un Tethered Remotely Operated Vehicle (UTROV) uses VLC for underwater communication. • For observatory maintenance of oceans and deployment opportunity from the ships.
- 10. 10 UTROV UTROV for low bandwidth underwater communications. Optical channel to a fixed infrastructure on sea floor. Optical channel with a ship based relay infrastructure. Low bandwidth underwater communications.
- 11. 11 Hospitals • Radio Interference with hospital equipments render Wi-Fi unsuitable. • Electromagnetic wave sensitive areas (such as MRI scanners) to switch to VLC. • Robot ‘HOSPI’ used for transportation in hospitals. • Control system enhancements in HOSPI using VLC installed in a building and navigational sensors of the robot.
- 12. 12 HOSPI Robot
- 13. 13 Information Signboards • Signboards made from LED arrays, modulated to convey information in airports, bus stops and other places where the broadcasting of data is necessary. • Sign boards used for indications in various locations such as airports, museums and hospitals.
- 14. 14 Visible Light ID System • As an ID system in places like buildings and subways. • Visible light ID system in public places, hospitals and airports. • Visible light ID system for identifying the room number and its building.
- 15. 15 Sound Communication System • Red, Green and Blue LEDs used for the transmission of music signals.
- 16. 16 Wireless Local Area Networks (WLANs) • LED based visible light communication used in setting up LANs. • Ultra-high speed full duplex, LAN based on star topology using LED visible light communication to provide a speed of more than 10 Gb/s for massive users. • Hybrid access protocol used in the LAN, Time Division Multiplexing (TDM) for bidirectional VLC transmission, Frequency Division Multiplexing (FDM) for uplink & downlink fiber transmission.
- 18. 18 VLC based WLANs • Potential to be used in office buildings and hospitals, which require a high level of safety. • Lighting system, white LEDs, infrared light etc. can be used for downlink/up-link. • High speed access for massive users.
- 19. 19 Thank You