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High data rate multiple input multiple output (MIMO) optical wireless communications using white led lighting

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8 Author(s)
Lubin Zeng ; Dept. of Eng. Sci., Univ. of Oxford, Oxford, UK ; O'brien, D. ; Hoa Minh ; Faulkner, G.
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Solid-state lighting is a rapidly growing area of research and applications, due to the reliability and predicted high efficiency of these devices. The white LED sources that are typically used for general illumination can also be used for data transmission, and Visible Light Communications (VLC) is a rapidly growing area of research. One of the key challenges is the limited modulation bandwidth of sources, typically several MHz. However, as a room or coverage space would typically be illuminated by an array of LEDs there is the potential for parallel data transmission, and using optical MIMO techniques is potentially attractive for achieving high data rates. In this paper we investigate non-imaging and imaging MIMO approaches: a non-imaging optical MIMO system does not perform properly at all receiver positions due to symmetry, but an imaging based system can operate under all foreseeable circumstances. Simulations show such systems can operate at several hundred Mbit/s, and up to Gbit/s in many circumstances.

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Selected Areas in Communications, IEEE Journal on  (Volume:27 ,  Issue: 9 )