基于整形极化码的可调光VLC系统实验研究  

Experimental study of dimmable VLC system based on shaping polarization code

作　　者：杨帆[1] 方佳飞 肖石林[1] 刘晓宇 郑立卓 张之仪 刘智洋 胡卫生[1] YANG Fan;FANG Jiafei;XIAO Shilin;LIU Xiaoyu;ZHENG Lizhuo;ZHANG Zhiyi;LIU Zhiyang;HU Weisheng(Shanghai Jiao Tong University,Shanghai 200240,China)

机构地区：[1]上海交通大学,上海200240

出　　处：《光通信技术》2022年第2期24-27,共4页Optical Communication Technology

基　　金：国家自然科学基金项目(No.62071295、No.61775137、No.61431009、No.61433009)资助。

摘　　要：传统的可见光通信(VLC)调光方案利用冗余的补偿符号实现调光控制,导致传输效率低。为了提高VLC系统传输效率,提出一种基于整形极化码的调光控制方案,通过预编码器改变码字中“1”出现的概率,从而在无需添加冗余补偿符号的情况下实现调光控制功能。实验结果表明:相比通过补偿符号实现调光控制的极化码方案,整形极化码方案具备更高的传输效率和更好的纠错性能,在25%和12.5%这2种典型的调光率场景中,编码增益至少可以分别达到1.9 d B和3.3 d B。The traditional visible light communication(VLC) dimming scheme uses redundant compensation symbols to achieve dimming control,resulting in low transmission efficiency.In order to improve the transmission efficiency of VLC system,a dimming control scheme based on shaping polarization code is proposed.The probability of "1" in code word is changed by preencoder,so the dimming control function can be realized without adding redundant compensation symbol.The experimental results show that the shaping polarization code scheme has higher transmission efficiency and better error correction performance compared with the compensating polarization code scheme.In the two typical dimming scenarios of 25% and 12.5%,the encoding gain can reach at least 1.9 dB and 3.3 dB respectively.

关 键 词：调光控制 极化码 可见光通信 

分 类 号：TN929.12[电子电信—通信与信息系统]