Performance of MIMO enhanced unipolar OFDM with realistic indoor visible light channel models

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2016

Authors

Panayırcı, Erdal
Miramirkhani, F.
Basar, E.
Panayırcı, Erdal
Uysal, M.

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Institute of Electrical and Electronics Engineers Inc.

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Abstract

Visible light communication (VLC) involves the dual use of illumination infrastructure for high speed wireless access. Designing such optical based communication systems, realistic indoor optical channel modeling becomes an important issue to be handled. In this paper, first we obtain new realistic indoor VL channel characterizations and models, in a multiple-input multiple-output (MIMO) transmission scenario, using non-sequential ray tracing approach for the channel impulse responses (CIRs). Practical issues such as number of light emitting diode (LED) chips per luminary, spacing between LED chips, objects inside the room and cabling topology are also investigated. On the other hand, since indoor optical channels exhibit frequency selectivity, multi-carrier communication systems, particularly orthogonal frequency division multiplexing (OFDM) is used to handle the resulting inter-symbol interference in VLC systems. Hence, we propose a new MIMO-OFDM based VLC system, called MIMO enhanced unipolar OFDM (MIMO-eU-OFDM) by combining MIMO transmission techniques with the recently proposed eU-OFDM scheme. The bit error rate (BER) performance of the proposed system is investigated in the presence of the 2 ? 2 and 4 ? 4 realistic MIMO VLC channels and its BER performance is compared with the reference optical MIMO-OFDM systems. © 2016 IEEE.

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2016 IEEE Wireless Communications and Networking Conference, WCNC 2016 --3 April 2016 through 7 April 2016 -- --123767

Keywords

MIMO enhanced unipolar orthogonal frequency division multiplexing (MIMO-eU-OFDM), Optical wireless communication (OWC), realistic indoor MIMO-VLC channel modeling, Bit error rate, Carrier communication, Channel estimation, Communication channels (information theory), Error statistics, Frequency division multiplexing, Gain control, Light, Light emitting diodes, MIMO systems, Multicarrier modulation, Multiplexing, Optical communication, Optical fiber communication, Optical systems, Ray tracing, Trellis codes, Visible light communication, Wireless telecommunication systems, Bit error rate (BER) performance, Channel characterization, Channel impulse response, Channel model, Multiple input multiple output transmissions, Optical channel model, Optical wireless communications, Visible light communications (VLC), Orthogonal frequency division multiplexing

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4

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IEEE Wireless Communications and Networking Conference, WCNC

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2016-September

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