Block diagram of SM/SPPM modulators for precoded MU-MIMO-VLC systems.
Impact Statement:Based on multiple-input multiple-output (MIMO) and optical orthogonal frequency division multiplexing (OOFDM) technologies, we show the promising application scenario of ...Show More
Abstract:
In this paper, we propose a multiuser precoded visible light communication (VLC) system utilizing optical orthogonal frequency division multiplexing (OFDM), where optical...Show MoreMetadata
Impact Statement:
Based on multiple-input multiple-output (MIMO) and optical orthogonal frequency division multiplexing (OOFDM) technologies, we show the promising application scenario of multi-user (MU) visible light communications (VLC) by introducing new precoded MU-MIMO-OOFDM-VLC systems. Extensive simulation results are offered, showing that the proposed schemes are capable of improving the system's achievable robustness and data rates without compromising the illumination services.
Abstract:
In this paper, we propose a multiuser precoded visible light communication (VLC) system utilizing optical orthogonal frequency division multiplexing (OFDM), where optical spatial modulation (OSM) and spatial pulse position modulation (SPPM) are invoked for supporting high-rate data transmissions without compromising uniform illumination across multiple light-emitting diodes (LEDs). Both OSM and SPPM exploit the index of data streams for carrying additional information bits, whereas the multiuser interference occurring between different user equipments is mitigated by the MIMO precoder. By evaluating the performances of the proposed VLC systems, we demonstrate that the OSM-aided system is capable of achieving high data rates at sufficiently high signal-to-noise ratios (SNRs). In contrast, the SPPM-aided system has a higher effective bandwidth efficiency at low SNRs, despite the fact that its attainable peak data rate is lower than that of the SM-aided counterpart. Such tradeoffs indicate the potential application scenarios of the proposed schemes for achieving diverse design prerequisites.
Block diagram of SM/SPPM modulators for precoded MU-MIMO-VLC systems.
Published in: IEEE Photonics Journal ( Volume: 8, Issue: 2, April 2016)