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WG1
Propagation Modelling and Channel Characterization

 

Co-Chairs: Carlo CAPSONI, Erich LEITGEB & Frank MARZANO

Vice-Chair: Stanislav ZVANOVEC

 

The ideal synergy between the algorithm and hardware implementation for OWC systems is usually hampered by their routinely unconnected developments, each typically designed whilst accounting for little of the other’s attributes. One reason for this “left-hand-knows-not-what-the-right-hand-does” predicament is the lack of availability of mathematically plain descriptions for the combined effects of optical wave propagation through the unguided media and the non-ideal constraints imposed by devices and circuit components.

The first step in OWC system design, which will be dealt by WG1, is therefore to develop, evaluate and validate statistical and empirical channel models for indoor and outdoor applications which capture the physical properties of the underlying OWC channel in a realistic manner, but yet still provide mathematically tractability. Towards this overall purpose, the major tasks of WG1 have been defined as:


• Microphysical and thermodynamic characterization of rain, snow, fog, haze, clouds and the development of advanced empirical models and tools to evaluate and predict the effect of such meteorological phenomena on the outdoor links;
• Development of novel physical-statistical models for SISO, MIMO and relay-assisted outdoor channels based on wave perturbation method and radiative transfer theory, taking into account the effects of both turbulence-induced fading (i.e., scintillation) and scattering/absorption due to atmospheric aerosols/hydrometeors;
• Development and evaluation of statistical models for mobile links, e.g., aeronautical, vehicular systems;
• Comparative evaluation of infrared, visible light and ultraviolet spectral bands and recommendation of the ones which are least effected by meteorological phenomena;
• Development of hybrid communication channel models where OWC is combined with microwave and/or millimetre-wave links;
• Development of “effective” channel models incorporating the device imperfections (e.g., non-linearities of off-the-shelf transmitter/receivers, receiver sensitivity, beam divergence, etc.);
• Experimental validation of the developed channel models through field measurements combined with meteorological and environmental data and analysis of related channel/link parameters such as atmospheric visibility, scintillation index, Fried parameter, intensity coherence length, etc.;
• Investigation of different beam shape and types (i.e., sinusoidal-Gaussian, annular, dark hollow, flat-topped Gaussian, off-axis-Gaussian and higher order) and quantification of their robustness in different propagation media;
• Development of low-complexity yet highly accurate ray-tracing models for indoor channels under various transmitter and receiver configurations.

 


Announcements

 

1. OPTICWISE becomes an Associate Member of the 5G PPP.

 

2. OPTICWISE participates in the preparation of new IEEE standart on OWC.

 

3. IWOW 2014 Workshop Proceedings are now available at IEEExplore! All papers can be accessed through this link.

 

4. OPTICWISE Chair to Give Keynote Speech at BlackSeaCom Conference.

 

5. IWOW 2013 Workshop Proceedings are now available at IEEExplore! All papers can be accessed through this link.


6. COST IC1101 OPTICWISE Action World Record: A FSO link at 1.6 Tbit/s (see more details on SPIE Vol 52, Issue 11, Nov 2013). 

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