Optical Wireless Communications - broadband connectivity in space, underwater and indoors

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We take mobile communications for granted. Given the degree to which mobile devices have penetrated into our daily lives, we expect to be able to make a call or establish a broadband data link anywhere. However, there are many environments in which radio frequency (RF) communications are inefficient or impossible. Attenuation in the propagation environment, energy efficiency restrictions and RF interference can render radio systems unusable.******Our research program develops wireless communication systems using optical rather than radio frequencies. Optical wireless links offer inexpensive, energy efficient broadband communication channels that are immune to RF interference or jamming and are free of spectral licensing requirements.******In this project, we will develop information theory, pragmatic algorithms and prototypes for three optical wireless applications. Space-based optical wireless can provide broadband connections between satellites, to the ground and to deep space more efficiently than their RF counterparts. We will consider the channel modelling, capacity and signalling design for micro- and nano-satellite constellations that do not have precise gimbals due to their size and energy constraints. In addition, this program will develop communication algorithms and fundamental limits for blue-green band underwater optical links where RF propagation is severely limited. We will develop novel channel models, MIMO architectures and hybrid optical/acoustic communication links. Finally, we will develop energy efficient optical wireless systems that leverage existing LED lighting infrastructure. These visible light communication (VLC) systems form an important piece to enable an ultra-dense internet-of-things (IoT) where radio links are limited due to interference. We will develop novel prototypes, energy-aware uplinks and algorithms to improve the spectral efficiency of such links.******This research program has the potential to provide impactful contributions given that there are few alternative technologies to provide connectivity in these challenging scenarios. In addition, the outcomes of this research program are ideally tuned to a Canadian context. For example, the use of small satellite clusters with laser communication links to extend the reach of geostationary orbiting satellites can serve as a key tool to monitor our vast Arctic or provide broadband to the peoples of the north. Given that Canada has a huge coastline rich in natural resources, underwater optical links are essential to enable security applications and marine-life-friendly data links. Visible light communications is essential to dense indoor IoT deployments and fits into Canada's tradition of innovation in communication networks. This project will provide Canada with the knowledge and HQP necessary to lead the commercialization of this next-generation broadband access technology.