Performance of Imaging Receivers Using Convex Lens in Indoor MIMO VLC Systems

Sushanth, KVSS and Chockalingam, A (2018) Performance of Imaging Receivers Using Convex Lens in Indoor MIMO VLC Systems. In: 87th IEEE Vehicular Technology Conference, VTC Spring 2018, 3 - 6 June 2018, Porto, pp. 1-5.

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Abstract

In multiple-input multiple-output (MIMO) indoor visible light communication (VLC) systems that employ non-imaging receivers, the bit error performance is degraded due to high spatial correlation. Imaging receivers can mitigate this degradation by concentrating the light energy, thereby reducing the correlation among the elements in the channel matrix. In this paper, we investigate the performance of the state-of-the-art MIMO VLC modulation schemes with convex lens-based imaging receivers. The MIMO modulation schemes considered include the well known spatial multiplexing (SMP) as well as other more recently proposed schemes such as generalized spatial modulation (GSM), quad-LED complex modulation (QCM), and dual-LED complex modulation (DCM). Performance gains up to 68 dB at 10-5 bit error rate are shown to be achieved with a convex lens based imaging receiver compared to a non-imaging receiver. We also study the spatial distribution of the best performing modulation scheme based on a minimum euclidean distance based metric. Results show that, with convex lens based imaging receiver, QCM and DCM outperform GSM and SMP.

Item Type:	Conference Paper
Publication:	IEEE Vehicular Technology Conference
Publisher:	Institute of Electrical and Electronics Engineers Inc.
Additional Information:	The copyright for this article belongs to the Institute of Electrical and Electronics Engineers Inc.
Keywords:	Bit error rate; Light; Light emitting diodes; MIMO systems; Modulation, Convex lens; Imaging receivers; Minimum euclidean distances; Modulation schemes; Spatial correlations; Spatial modulations; Spatial multiplexing; Visible light communications (VLC), Visible light communication
Department/Centre:	Division of Electrical Sciences > Electrical Communication Engineering
Date Deposited:	07 Aug 2022 09:00
Last Modified:	07 Aug 2022 09:00
URI:	https://eprints.iisc.ac.in/id/eprint/75445

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