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This document outlines a presentation on evaluating the performance of a non-line-of-sight laser-based wireless communication model in a turbulent atmosphere. It introduces key components of free space optical systems using infrared lasers, discusses limitations of line-of-sight terrestrial technologies, and provides a system block diagram and analysis of transmission distance and performance. The presentation also includes conclusions and a list of 10 references on topics like non-line-of-sight ultraviolet communication, modeling of beam-waveguide antennas, and performance analysis of free space optical links over atmospheric turbulence.
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- 1. Performance Evaluation of Laser Based Non Line-of- Sight Wireless Communication Model in Turbulent Atmosphere
- 2. Outline of Presentation Introduction State of Art Proposed Idea for IR- NLOS FSO Link System Block Diagram Gauging Transmission Distance Performance Analysis Conclusion References
- 3. Introduction Key FSO System Components: Laser (Tx.) and Photo-detector (Rx.). Communication Signal [1] : Infrared laser : 780-850 & 1520-1600nm. Communication Medium [2] : Free space channel: Inter-stellar, atmosphere & underwater. Limitations of Terrestrial LOS Technology Shadowing by intermittent obstacles : Trees, Multi-stored Buildings Localised atmospheric attenuation Fog, Rain and Clouds 3 Fig: Commercial Line-of-Sight (LOS) based Free Space Optical (FSO) System ( Source: www.althosbooks.com )
- 4. 4 [1] J. M. Kahn and J. R. Barry, Wireless infrared communications, Proceedings of IEEE, (85), pp. 265-298. [2] M. Uysal, and M. Yu, Error Rate Performance Analysis of Coded FSO Links over Gamma-Gamma Turbulence Channels, IEEE Trans. Wireless Commun, (5), pp. 1229-1233, 2006. [3] Z. Xu, and B. M. Sadler, “Ultraviolet communications: potential and state-of-the-art,” IEEE Commun. Mag.46(5), 67–73 (2008). [4] Q. He, Z. Xu, and B.M. Sadler, Performance of short-range non-line-of-sight LED-based ultraviolet communication receivers, Optics Express, (18), pp.12226-12238, 2010. [5] Z. Xu, G. Chen, and M.Leonardi, Experimental performance evaluation of non-line-of-sight ultraviolet communication systems, Proc. of SPIE, (6709), pp.1-12, 2007. [6] Pasian, M.; Bozzi, M.; Perregrini, L., Accurate Modeling of Dichroic Mirrors in Beam-Waveguide Antennas, IEEE Transactions on Antennas and Propagation, 61(4), pp. 1931 – 1938, 2013. [7] H.E. Nistazakis, T.A. Tsiftsis and G.S. Tombras1, Performance analysis of FSO communication systems over turbulence channels, IET Commun., (3) ,pp. 1402–1409, 2009. [8] Sandalidis H.G., Tsiftsis T.A.‘Outage probability and ergodic capacity of free-space optical links over strong turbulence’, Electron. Lett., 2008, 44, pp. 46–47. [9] Z.Wang,W.Zhong,C.Yu, and S. Fu, Performance improvement of OOK-FSO transmission systems by a co-propagating reference continuous wave light, Optics Express, vol. 20, pp.9284-9295, April 2012. [10] Rahul Bosu, Shanthi Prince, Perturbation Methods to Track Wireless Optical Wave Propagation in a Random Media, Journal of Optical Society of America, vol.33, 2016. References