摘要
为了分析在单径和多径瑞利信道下可见光信号的收发特性,研究了基于白光LED作为光源、采用瑞利衰落信道传输以及应用三种不同QAM-OFDM信号的室内可见光通信系统。首先,采用MATLAB软件搭建了支持三类QAM-OFDM信号实现可见光通信系统仿真的模型;然后,分析了三类QAM-OFDM信号在单径和二径瑞利衰落信道下的误码率(BER)与接收信号信噪比(SNR)的关系;最后,综合频带利用率和数字信号处理过程考虑,建议实际应用中选用8QAM-OFDM信号进行收发。此外,还基于照度分析结果验证了8QAMOFDM信号的实际应用可行性。
In order to analyze the transmission and reception characteristics of visible light signals in single-path and multi-path Rayleigh channels,we design an indoor visible light communication system based on white LED,in which three kinds of QAM-OFDM signals are used under Rayleigh channel condition.Firstly,the simulation model of visible light communication system supporting three types of QAM-OFDM signals is built by using MATLAB software.And then,the relationship between the bit error rate(BER) and the received signal-to-noise ratio(SNR) of three types of QAM-OFDM signals in single-path and two-path Rayleigh fading channels are analyzed.It is suggested that 8 QAM-OFDM signals should be selected in the transceiver in practical application,if the bandwidth utilization and digital signal processing are considered.At last,the feasibility of 8 QAM-OFDM signal is verified by illumination analysis.
作者
赵云杰
邵宇丰
龙颖
刘毓
胡钦政
王安蓉
雷国平
ZHAO Yun-jie;SHAO Yu-feng;LONG Ying;LIU Yu;HU Qin-zheng;WANG An-rong;LEI Guoping(Chongqing Three Gorges University,College of Electronic and Information Engineering,Chongqing 404100,China)
出处
《光电子.激光》
EI
CAS
CSCD
北大核心
2019年第8期804-809,共6页
Journal of Optoelectronics·Laser
基金
国家自然科学基金(6117064)
重庆市科委前沿与应用基础研究项目(cstc2018jcyjAX0038、cstc2014jcyjA40046、 cstc2016jcyjA1233)
重庆市高校创新团队建设计划项目(KJTD201320)
重庆市研究生科研项目(CYS18345、 YJSKY2017003)
重庆市万州区科技人才专项项目
重庆市教委自然科学基金(KJ1401005)资助项目
关键词
可见光通信
正交频分复用
瑞利信道
误码率
visible light communication
orthogonal frequency division multiplexing (OFDM)
rayleigh channel
bit error rate (BER)