OWC: Free-space and visible light communications

Point of contact


Motivated by simple deployment and high rates compared to RF technologies, FSO communications are expanding rapidly. The capacity of various FSO intensity-modulated direct-detection channel models (SISO, MISO and MIMO) are being studied to define the fundamental limits of communication over these schemes with average and maximum intensity constraints. Practical signaling schemes can also be designed specifically for these channels. On another note, data rate increases of ground-to-satellite and satellite-to-ground communications are required for various applications. For this purpose, coherent-detection based transmission transceiver schemes are investigated with new challenges of a different nature than for coherent optical fiber systems. To name a few, novel laser sources and adaptive optics are needed at the transceiver frontend for power-efficient communications. The channel model should also take into account atmospheric turbulences as well as other fading effects.


Terrestrial FSO, deep-space FSO, visible light communications

Researchers involved or interested

A few references

  • M. Z. Chowhury, M. T. Hossain, A. Islam, and Y. M. Jang, “A Comparative Survey of Optical Wireless Technologies: Architectures and Applications,” IEEE Access, vol. 6, pp. 9819-9840, March 2018.
  • Special Issue on Localisation, Communication and Networking with VLC, IEEE Journal on Selected Areas on Communications, vol. 36, no. 1, January 2018.
  • Special Section on Optical Wireless Technologies for 5G Communications and Beyond, IEEE Access, 2017.