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Visible light communications is an energy efficient and cost-effective solution for indoor wireless access. In this paper, we propose a multiple input multiple output system using centralized or decentralized transmitted power allocation algorithms with multiple LEDs and photodetectors. The proposed system uses an optical code division multiple-access technique to support multiple users. Time-space...
Visible light communication is an emerging field in indoor wireless connection, and it is a candidate technique to provide high-speed data transmission. In this paper, we propose a joint optimal waveform design system to support multiple users. In this system, transmitted waveforms and minimum mean squared error filters are jointly optimized to minimize the inter-symbol interference and multiple access...
In multiuser multiple input single output (MISO) visible light communication (VLC) systems using LEDs with limited rise-times, it is essential to find effective M-ary modulation schemes to increase the bit rate. In this paper, we propose an adaptive M-ary pulse amplitude modulation (M- PAM) algorithm to support multiple users. The proposed algorithm can adjust the modulation constellation size for...
Visible light communications (VLC) is an energy efficient and cost-effective solution for indoor wireless access. In this paper, we propose a suite of signal processing techniques based on multiple input multiple output (MIMO) technology to increase the reliability and throughput of multiuser VLC systems.
In multiuser MISO (multiple-input single output) visible light communication (VLC) systems, it is essential to find effective means for allocating the transmitted power from the various LEDs fairly among users that are randomly dispersed in large indoor environments. Distributed algorithms are a natural choice because, unlike centralized power allocation algorithms, distributed schemes do not require...
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