A BIPCM Scheme Based on OCT Precoding for a 256-QAM OFDM-VLC System

作者：Wu, Kaiquan; He, Jing^*; Ma, Jie; Wei, Yiran

来源：IEEE Photonics Technology Letters, 2018, 30(21): 1866-1869.

DOI：10.1109/LPT.2018.2870114

• Visible light communication
• OFDM
• QAM
• BICM
• polar code
• OCT

A bit-interleaved polar-coded modulation (BIPCM) scheme based on orthogonal circulant matrix transform (OCT) precoding is proposed and experimentally demonstrated in an orthogonal frequency-division multiplexing (OFDM) visible light communication system. It exhibits the advantages of high reliability, low latency, and low computational complexity. To overcome the fading effect on a mapped bit-level, the scheme employs the Monte Carlo method to jointly design a polar code concatenated with 256-ary quadrature-amplitude modulation. In addition, OCT precoding is used to mitigate the frequency selective fading effect across OFDM subcarriers. The experimental results show that the system can achieve a net data rate of 343 Mb/s over 80-cm free-space transmission with a bit error rate below 1x10(-3). At the receiver, it is the number of complex multiplications is reduced by 33% in comparison with BIPCM using an optimized quadratic polynomial permutation interleaver.

• 出版日期2018-11-1
• 单位湖南大学