• Optoelectronics Letters
  • Vol. 14, Issue 3, 229 (2018)
LIYang , Rui DENG*, Jing HE, Song-hua HE, and Lin and CHEN
Author Affiliations
  • Key Laboratory for Micro/Nano Optoelectronic Devices of Ministry of Education, College of Computer Science and Electronic Engineering, Hunan University, Changsha 410082, China
  • show less
    DOI: 10.1007/s11801-017-7057-y Cite this Article
    LIYang, DENG Rui, HE Jing, HE Song-hua, and CHEN Lin. DFT-spread combined with clipping method to reduce the PAPR in VLC-OFDM system[J]. Optoelectronics Letters, 2018, 14(3): 229 Copy Citation Text show less

    Abstract

    Orthogonal frequency division multiplexing (OFDM) is an attractive technique to realize high data rate in light emitting diodes (LEDs)-based visible light communication (VLC). However, high peak-to-average power ratio (PAPR) of OFDM makes VLC-OFDM very sensitive to the nonlinearity of LEDs. In this paper, the discrete Fourier transform-spread (DFT-spread) combined with clipping method is proposed to reduce the PAPR of OFDM signal in VLC system. Combining simulation with experiment, a performance comparison is made among conventional OFDM, DFT-spread-OFDM, and clipped DFT-spread-OFDM with different clipping ratios (CRs) in a single LED-based VLC system. The experimental results show that the proposed clipped DFT-spread-OFDM method can effectively improve the system performance compared with the other two methods. At the optimum signal peak-to-peak (PTP) value, by using the clipped DFT-spread-OFDM scheme with CR at 8 dB, the bit error rate (BER) of the system can be reduced from 0.003 7 to 0.000 287.
    LIYang, DENG Rui, HE Jing, HE Song-hua, and CHEN Lin. DFT-spread combined with clipping method to reduce the PAPR in VLC-OFDM system[J]. Optoelectronics Letters, 2018, 14(3): 229
    Download Citation