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SVD-VLC: A novel capacity maximizing VLC MIMO system architecture under illumination constraints

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3 Author(s)
Butala, P.M. ; Dept. of Electr. & Comput. Eng., Boston Univ., Boston, MA, USA ; Elgala, H. ; Little, T.D.C.

Multiple-input multiple-output (MIMO) systems using multiple light emitting diode (LED) sources and photodiode (PD) detectors are attractive for visible light communication (VLC) as they offer a capacity gain proportional to the number of parallel single-input single-output (SISO) channels. MIMO VLC systems exploit the high signal-to-noise ratio (SNR) of a SISO channel offered due to typical illumination requirements to overcome the capacity constraints due to limited modulation bandwidth of LEDs. In this work, a modified singular value decomposition VLC (SVD-VLC) MIMO system is proposed. This system maximizes the data rate while maintaining the target illumination and allowing the channel matrix to vary in order to support mobility in a practical indoor VLC deployment. The upper bound on capacity of the proposed SVD-VLC MIMO system is calculated assuming an imaging receiver. The relationship between the proposed system performance and system parameters total power constraint, lens aperture and random receiver locations are described.

Published in:

Globecom Workshops (GC Wkshps), 2013 IEEE

Date of Conference:

9-13 Dec. 2013