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

Author

Butala, Pankil Mukund ; Elgala, Hany ; Little, Thomas D. C.

Author_Institution

Dept. of Electr. & Comput. Eng., Boston Univ., Boston, MA, USA

fYear

2013

fDate

9-13 Dec. 2013

Firstpage

1087

Lastpage

1092

Abstract

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.

Keywords

MIMO communication; image sensors; indoor communication; light emitting diodes; optical communication; optical receivers; photodiodes; singular value decomposition; telecommunication network topology; LED sources; MIMO systems; PD detectors; SISO channels; SNR; SVD-VLC; capacity constraints; capacity gain; capacity maximizing VLC MIMO system architecture; channel matrix; data rate; illumination constraints; illumination requirements; imaging receiver; indoor VLC deployment; lens aperture; light emitting diode; modulation bandwidth; multiple-input multiple-output systems; photodiode; power constraint; receiver locations; signal-to-noise ratio; single-input single-output channels; singular value decomposition; target illumination; visible light communication; Imaging; Lighting; MIMO; Noise; Optical receivers; Optical transmitters; IEEE 802.15.7; Imaging Receiver; Multiple Input Multiple Output (MIMO); Optical Wireless Communications; Singular Value Decomposition (SVD); Visible Light Communications (VLC);

fLanguage

English

Publisher

ieee

Conference_Titel

Globecom Workshops (GC Wkshps), 2013 IEEE

Conference_Location

Atlanta, GA

Type

conf

DOI

10.1109/GLOCOMW.2013.6825137

Filename

6825137