Multi-LED Phase-Shifted OOK Modulation Based Visible Light Communication Systems

作者：Zhang Dong Fang^*; Zhu Yi Jun; Zhang Yan Yu

来源：IEEE Photonics Technology Letters, 2013, 25(23): 2251-2254.

DOI：10.1109/LPT.2013.2283583

• Light-emitting diode (LED)
• modulation bandwidth
• nonlinearity
• visible light communication (VLC)
• multi-LED phase-shifted OOK (MP-OOK)
• bandwidth efficiency

The limited modulation bandwidth and the non-linearity nature of LEDs are the key challenges to visible light communication. In general, one LED lamp consists of multiple LED chips. In this letter, these LED chips are used for parallel transmission though multi-LED phase-shifted OOK (MP-OOK) modulation. For MP-OOK, the bandwidth efficiency is approximate N times that of conventional OOK (N is the number of LED chips). For each branch, the modulation format is OOK. Hence, MP-OOK has a better anti-nonlinearity performance than other high-order modulation formats, such as DC-biased optical orthogonal frequency-division multiplexing (DCO-OFDM). The simulation comparisons between MP-OOK and DCO-OFDM verify these.

• 出版日期2013-12-1
• 单位中国科学技术信息研究所