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.
Performance of Imaging Receivers Using Convex Lens in Indoor MIMO VLC Systems
01.06.2018
286960 byte
Aufsatz (Konferenz)
Elektronische Ressource
Englisch
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