標題: | Performance Comparison of OFDM Signal and CAP Signal Over High Capacity RGB-LED-Based WDM Visible Light Communication |
作者: | Wu, F. M. Lin, C. T. Wei, C. C. Chen, C. W. Chen, Z. Y. Huang, H. T. Chi, Sien 光電系統研究所 Institute of Photonic System |
關鍵字: | Visible light communication;carrier-less amplitude and phase modulation;wavelength-division-multiplexing |
公開日期: | 1-八月-2013 |
摘要: | We experimentally demonstrate a visible light communication (VLC) system based on a single commercially available RGB-type LED. High spectrally efficient carrier-less amplitude and phase (CAP) modulation and orthogonal frequency-division multiplexing (OFDM) are adopted in the intensity-modulation and direct-detection VLC system of limited bandwidth. In order to achieve higher capacity of the uneven-frequency-response LED-based VLC system, OFDM signals are combined with the bit-and power-loading techniques, and CAP signals of various modulation are pre-emphasized to modulate one of the RGB chips. To reach the BER of less than 10(-3), CAP and OFDM signals demonstrate the maximum data rates of 1.32 and 1.08 Gb/s, respectively, employing the blue chip. In addition to spectrally efficient formats, the wavelength-division-multiplexing (WDM) scheme is applied to further increase the capacity. After individually optimizing RGB chips, the maximum aggregate data rates of CAP and OFDM are 3.22 and 2.93 Gb/s, respectively, in our RGB-LED-based WDM VLC system. Hence, compared with OFDM, the CAP scheme shows competitive performance and provides an alternative spectrally efficient modulation for next generation optical wireless networks. |
URI: | http://dx.doi.org/10.1109/JPHOT.2013.2271637 http://hdl.handle.net/11536/22153 |
ISSN: | 1943-0655 |
DOI: | 10.1109/JPHOT.2013.2271637 |
期刊: | IEEE PHOTONICS JOURNAL |
Volume: | 5 |
Issue: | 4 |
結束頁: | |
顯示於類別: | 期刊論文 |