LiFi: The Internet-of-Things enabled by Li-Fi

Li-Fi (Light-Fidelity) is high speed wireless communications through light emitting diodes (LEDs). Li-Fi has first been coined by Prof. Haas in his TED talk:

We investigate Li-Fi in the context of novel 5G technologies to solve the looming spectrum crisis in wireless communications. Transmission speeds of up to 10 Gbps have been demonstrated in our lab and it has also been shown that Li-Fi does not required line-of-sight. Therefore, we are now studying wireless system concepts based on Li-Fi technology. We refer to a cellular Li-Fi network as an attocell network as the cell sizes are smaller than in a typical radio frequency (RF) femtocell network potentially unlocking very high area spectral efficiencies.

The Internet-of-Things enabled by Li-Fi

Li-Fi uses direct modulation without the need for intermediate frequencies (super-heterodyning) in RF systems. Moreover, it uses inexpensive optical components such as off-the-shelf LEDs and photodetectors. It is, thus, possible to create small, low-complex transceiver units that enable any LED light to act as a high speed data transmitter. Similarly, various low-complexity photodector solutions will be studied. Finally, this work will investigate novel Li-Fi transceiver concepts and study Internet-of-Things and sensor network scenarios based on the proposed transceiver technology.

Further Information: 

Closing Date: 

Monday, June 1, 2015
Alexander Graham Bell building, King's Buildings Campus, University of Edinburgh
The Li-Fi R&D Centre is located within the Alexander Graham Bell building, University of Edinburgh

Principal Supervisor: 


Minimum entry qualification - an Honours degree at 2:1 or above (or International equivalent) in a relevant science or engineering discipline, possibly supported by an MSc Degree. Further information on English language requirements for EU/Overseas applicants.


Strong candidates may be considered for full EPSRC funding - open to UK/EU candidates only.

Further information and other funding options.