An approach enabling adaptive FEC for OFDM in fiber-VLLC system

作者：Wei, Yiran; He, Jing^*; Deng, Rui; Shi, Jin; Chen, Shenghai; Chen, Lin

来源：Optics Communications, 2017, 405: 329-333.

DOI：10.1016/j.optcom.2017.08.041

• Orthogonal frequency division multiplexing (OFDM)
• Fiber-visible laser light communication (VLLC)
• Orthogonal circulant matrix transform (OCT) precoding
• OCT-based adaptive Frame-level-Reed-Solomon (RS)-Code

In this paper, we propose an orthogonal circulant matrix transform (OCT)-based adaptive frame-level-forward error correction (FEC) scheme for fiber-visible laser light communication (VLLC) system and experimentally demonstrate by Reed-Solomon (RS) Code. In this method, no extra bits are spent for adaptive message, except training sequence (TS), which is simultaneously used for synchronization and channel estimation. Therefore, RS-coding can be adaptively performed frames by frames via the last received codeword-error-rate (CER) feedback estimated by the TSs of the previous few OFDM frames. In addition, the experimental results exhibit that over 20 km standard single-mode fiber (SSMF) and 8 m visible light transmission, the costs of RS codewords are at most 14.12% lower than those of conventional adaptive subcarrier-RS-code based 16-QAM OFDM at bit error rate (BER) of 10(-5).

• 出版日期2017-12-15
• 单位怀化学院; 湖南大学