Fraunhofer HHI announces a new toolkit for the simulation of networked Li Fi systems
Fraunhofer HHI announces a new toolkit for the simulation of networked Li Fi systems
Fraunhofer HHI
The Fraunhofer Institute for Telecommunications, Heinrich Hertz Institute, HHI, also known as Fraunhofer HHI or Fraunhofer Heinrich Hertz Institute, is an organisation of the Fraunhofer Society based in Berlin. The institute engages in applied research and development in the fields of physics, electrical engineering and computer sciences.
The Fraunhofer Heinrich Hertz Institute develops mobile and stationary broadband communication networks and multimedia systems. Focal points of independent and contract research conducted by Fraunhofer HHI are photonic components and systems, fiber optic sensor systems, and image signal processing and transmission. Future applications for broadband networks are developed as well. Research in this area focuses on 3D displays, UHD panorama video production, human-machine interaction through gesture control, optical satellite communication and data transmission technologies such as visible light communications.
A research team from the "Photonic Networks and Systems" department has now created a new toolkit for the simulation of networked LiFi systems.
The research team's implementations are based on a long-term developed MATLAB signal processing toolbox with algorithms being verified by numerous simulations, laboratory experiments, and tests. The LiFi software suite can be used to complete link level simulation chains and to validate LiFi transmission and receive components.
When used for system-level (multilink) simulations, it is possible to optimise LiFi for different applications such as for conference rooms, operating rooms or industrial manufacturing environments. This also supports the further development of standards.
LiFi software suite components can be used individually or as a complete package and can be adapted to specific requirements. Different licensing models depending on individual customer needs are available.
The software was developed within the German research projects OWICELLS , SESAM, AIRBORNE, ERIKA and OTB-5G+ and the European projects VISION and ELIoT.
What is Li-Fi?
Li-Fi, also known as "Light Fidelity" is a wireless optical networking technology, which uses light-emitting diodes (LEDs) to transmit data. In 2011, professor Harald Haas made a Li-Fi demonstration at the TED (Technology, Entertainment, Design) Global Talk on Visible Light Communication (VLC):
VLC uses light as a medium to deliver high-speed communication like Wi-Fi and complies with the IEEE standard IEEE 802.15.7. The IEEE 802.15.7 is a high-speed, bidirectional, and fully networked wireless communication technology-based standard similar to Wi-Fi's IEEE 802.11.
How does Li-Fi work?
Li-Fi is a high speed, bidirectional, and fully networked wireless communication of data using light. Li-Fi constitutes of several light bulbs that form a wireless network.
When an electrical current goes through to a LED light bulb, a stream of light (photons) emits from the lamp. LED bulbs are semiconductor devices, which means that the brightness of the light flowing through them can change at extremely high speeds. The signal is sent by modulating the light at different rates. The signal can then be received by a detector which interprets the changes in light intensity (the signal) as data. Also when the LED is ON, you transmit a digital 1, and when it is OFF, you transmit a 0.
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