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Abstract
Wireless optical links based on diffuse infrared (IR) light propagation can be used in a host of Indoor applications such as mobile links, and offer flexibility during installation or system expansion, EMI immunity, and substantial cost savings. In such systems, it is Important to know the IR-slgnal power requirements due to the bandwidth and peak-power limitations of LED sources. This paper presents a method for predicting the required IR signal level on the basis of room parameters, Including reflection coefficients and the light intensity distribution pattern. The resulting curves constitute a quick reference for the designer of such links.