6 December 2002 Simulation of impulse response on IR wireless indoor channel with concentrator
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Proceedings Volume 4873, Optical Wireless Communications V; (2002) https://doi.org/10.1117/12.455501
Event: ITCom 2002: The Convergence of Information Technologies and Communications, 2002, Boston, MA, United States
Abstract
In the wireless infrared communications it is necessary to place a non-imaging optic concentrator in front of the planar PIN photo-detector in order to achieve more optic energy that can result in greater electrical SNR ratio. Incidence rays, which have different directions relative to the axis of concentrator, will produce different optic gain, and then it changes the channel impulse response compared with the one which is made in a simple planar PIN detector system. In addition, the field of view (FOV) will dramatically affect the system performance. Decreasing the FOV of concentrator will reduce the multipath-induced intersymbol interference (ISI), but at the same time it also reduces the total optic energy that is received. This paper demonstrates the effect of concentrator on impulse response of IR wireless indoor channel and compares the differences of the impulse responses of diffuse channel, basing on whether a hemisphere concentrator or a truncated spherical concentrator has been used. The paper also presents the relationships between FOV and system bandwidth and between FOV and average optical energy. A conclusion of optimal result is drawn.
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Xin Yang, Mali Gong, Haitao Zhang, Ping Yan, Shanshan Zou, Wei Jin, Kai Zhang, Feng Jiang, Yu Meng, "Simulation of impulse response on IR wireless indoor channel with concentrator", Proc. SPIE 4873, Optical Wireless Communications V, (6 December 2002); doi: 10.1117/12.455501; https://doi.org/10.1117/12.455501
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