Bandwidth-efficient visible light communication system based on faster-than-Nyquist pre-coded CAP modulation

作     者：迟楠 赵嘉琦 王智鑫 

作者机构：State Key Lab of ASIC Department of Communication Science and Engineering Fudan University Shanghai 200433 China 

出 版 物：《Chinese Optics Letters》 (中国光学快报（英文版）)

年 卷 期：2017年第15卷第8期

页      面：6-11页

核心收录：

学科分类：080904[工学-电磁场与微波技术] 0810[工学-信息与通信工程] 0809[工学-电子科学与技术（可授工学、理学学位）] 08[工学] 080402[工学-测试计量技术及仪器] 0804[工学-仪器科学与技术] 081001[工学-通信与信息系统] 0803[工学-光学工程] 

基　　金：supported by the National Science Foundation of China(No.61571133) Key Project of Guangdong Province of China(No.2015B010113001) 

主　　题：CAP high FTN VLC than 

摘      要：With the rapid development of the light-emitting diode （LED） industry, interest in visible light communication （VLC） is growing. The limited bandwidth of commercial LEDs is one of the main challenges to achieve high- speed VLC. In this Letter, a kind of bandwidth-efficient VLC system based on carrierless amplitude and phase （CAP） modulation is proposed, where a simple differential faster-than-Nyquist （FTN） pre-coding scheme is em- ployed to compress the spectrum and further improve the overall system baud rate. The system is experimentally demonstrated with a data rate of 1.47-Cb/s over 1.5 m free space transmission. The results indicate that an improvement of 80 Mbaud is achieved by FTN-CAP4 at 20% subband overlap and 40 Mbaud rate improvement by FTN-CAP16 at 7.5% subband overlap. Compared with traditional CAP, the FTN pre-coded CAP shows a better performance in spectral efficiency （SE） and intercarrier interference resistance. To the best of our knowl- edge, it is the first time to employ FTN pre-coded CAP in indoor high-data-rate VLC systems.