12 September 2014 High-speed phosphor-LED wireless communication system utilizing no blue filter
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Abstract
In this paper, we propose and investigate an adaptively 84.44 to 190 Mb/s phosphor-LED visible light communication (VLC) system at a practical transmission distance. Here, we utilize the orthogonal-frequency-division-multiplexing quadrature-amplitude-modulation (OFDM-QAM) modulation with power/bit-loading algorithm in proposed VLC system. In the experiment, the optimal analogy pre-equalization design is also performed at LED-Tx side and no blue filter is used at the Rx side for extending the modulation bandwidth from 1 MHz to 30 MHz. In addition, the corresponding free space transmission lengths are between 75 cm and 2 m under various data rates of proposed VLC. And the measured bit error rates (BERs) of < 3.8×10-3 [forward error correction (FEC) limit] at different transmission lengths and measured data rates can be also obtained. Finally, we believe that our proposed scheme could be another alternative VLC implementation in practical distance, supporting < 100 Mb/s, using commercially available LED and PD (without optical blue filtering) and compact size.
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C. H. Yeh, C. W. Chow, H. Y. Chen, J. Chen, Y. L. Liu, Y. F. Wu, "High-speed phosphor-LED wireless communication system utilizing no blue filter", Proc. SPIE 9193, Novel Optical Systems Design and Optimization XVII, 91931A (12 September 2014); doi: 10.1117/12.2060653; https://doi.org/10.1117/12.2060653
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