用于可见光通信的CAP-ADPPM混合调制系统设计  

Design of CAP-ADPPM hybrid modulation system for visible light communication

作　　者：张雨茜 王旭东[1] 吴楠[1] ZHANG Yuqian;WANG Xudong;WU Nan(Information Science Technology College,Dalian Maritime University,DalianLiaoning 116026,China)

机构地区：[1]大连海事大学信息科学技术学院,辽宁大连116026

出　　处：《光通信技术》2022年第2期8-12,共5页Optical Communication Technology

基　　金：国家自然科学基金项目(61371091)资助。

摘　　要：为提高可见光通信链路传输性能,提出一种无载波幅度相位(CAP)和幅度差分脉位调制(ADPPM)混合的调制系统。该系统通过将频谱高效的多维CAP调制与功率高效的ADPPM相结合,利用ADPPM的时隙脉冲搭载CAP信号进行信息传输;在高斯白噪声信道模型下,推导了CAP-ADPPM混合调制系统的误帧率解析表达式并进行了仿真验证;分析了混合调制系统的阶数、幅度取值等参数对系统误帧性能的影响。实验结果表明:当频谱效率相同时,CAP-ADPPM混合调制系统的可靠性优于传统单一调制系统,并且可以提供多种参数选择方案,为可见光通信提供了更为灵活的设计选择。In order to improve the transmission performance of visible light communication link,a hybrid modulation system of carrier free amplitude phase(CAP) and amplitude differential pulse position modulation(ADPPM) is proposed.The system combines spectrum efficient multidimensional CAP modulation with power efficient ADPPM,and uses the time slot pulse of ADPPM to carry the CAP signal for information transmission.Under the Gaussian white noise channel model,the analytical expression of frame error rate of CAP-ADPPM hybrid modulation system is derived and verified by simulation.The influence of the order and amplitude of the hybrid modulation system on the frame error performance of the system is analyzed.The experimental results show that when the spectral efficiency is the same,the reliability of CAP-ADPPM hybrid modulation system is better than that of traditional single modulation system,and can provide a variety of parameter selection schemes,which provides a more flexible design choice for visible light communication.

关 键 词：可见光通信 幅度差分脉位调制 无载波幅度相位调制 误帧率 

分 类 号：TN929.12[电子电信—通信与信息系统]