Achievable information rate enhancement of visible light communication using probabilistically shaped OFDM modulation

作者：Xie, Chenhui; Chen, Zexin; Fu, Songnian^*; Liu, Wu; He, Zhixue; Deng, Lei; Tang, Ming; Liu, Deming

来源：Optics Express, 2018, 26(1): 367-375.

DOI：10.1364/OE.26.000367

• TRANSMISSION

We present the first experimental demonstration of orthogonal frequency division multiplexed (OFDM) modulation using the probabilistic shaping (PS) technique in visible light communication (VLC) systems, in order to increase the achievable information rate (AIR) according to the pre-estimated signal to noise ratio (SNR) of VLC channel. We numerically investigate the performance of PS technique and make a fair comparison with bit-loading technique under different scenarios. By using a phosphor-LED based VLC system with available bandwidth of similar to 45-MHz, OFDM with PS technique can experimentally realize an AIR of 204.1-Mb/s over 1-m free space transmission, leading to a 26.8% increment in comparison with OFDM using bit-loading technique at the expense of 16% overall forward error correction (FEC) overhead (OH).

• 出版日期2018-1-8
• 单位华中科技大学; 武汉邮电科学研究院