| 瑞利衰落信道下QAM-OFDM可见光信号传输特性的研究 |
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| 引用本文： | 赵云杰,邵宇丰,龙颖,刘毓,胡钦政,王安蓉,雷国平.瑞利衰落信道下QAM-OFDM可见光信号传输特性的研究[J].光电子．激光,2019,30(8):804-809. |
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| 作者姓名： | 赵云杰 邵宇丰 龙颖 刘毓 胡钦政 王安蓉 雷国平 |
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| 作者单位： | 重庆三峡学院 电子与信息工程学院,重庆 万州 404100,重庆三峡学院 电子与信息工程学院,重庆 万州 404100,重庆三峡学院 电子与信息工程学院,重庆 万州 404100,重庆三峡学院 电子与信息工程学院,重庆 万州 404100,重庆三峡学院 电子与信息工程学院,重庆 万州 404100,重庆三峡学院 电子与信息工程学院,重庆 万州 404100,重庆三峡学院 电子与信息工程学院,重庆 万州 404100 |
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| 基金项目： | 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和重庆市教委自然科学基金(KJ1401005)资助项目 (重庆三峡学院 电子与信息工程学院,重庆 万州 404100) |
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| 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MATL AB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。
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| 关 键 词： | 可见光通信 正交频分复用 瑞利信道 误码率 |
| 收稿时间： | 2018/12/18 0:00:00 |
Research on transmission characteristics of QAM-OFDM visible signals in rayleig h fading channel |
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| ZHAO Yun-jie,SHAO Yu-feng,LONG Ying,LIU Yu,HU Qin-zheng,WANG An-rong and LEI Guoping.Research on transmission characteristics of QAM-OFDM visible signals in rayleig h fading channel[J].Journal of Optoelectronics·laser,2019,30(8):804-809. |
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| Authors: | ZHAO Yun-jie SHAO Yu-feng LONG Ying LIU Yu HU Qin-zheng WANG An-rong and LEI Guoping |
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| Affiliation: | Chongqing Three Gorges University,College of Electronic and Information Engi neering,Chongqing 404100,China,Chongqing Three Gorges University,College of Electronic and Information Engi neering,Chongqing 404100,China,Chongqing Three Gorges University,College of Electronic and Information Engi neering,Chongqing 404100,China,Chongqing Three Gorges University,College of Electronic and Information Engi neering,Chongqing 404100,China,Chongqing Three Gorges University,College of Electronic and Information Engi neering,Chongqing 404100,China,Chongqing Three Gorges University,College of Electronic and Information Engi neering,Chongqing 404100,China and Chongqing Three Gorges University,College of Electronic and Information Engi neering,Chongqing 404100,China |
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| Abstract: | 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 ligh t communication system based on white LED,in which three kinds of QAM-OFDM signals are used under Ray leigh channel condition.Firstly,the simulation model of visible light communication system s upporting 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 8QAM-OFDM signals should be selected in the transceiver in practical application,if the bandwidth utiliz ation and digital signal processing are considered.At last,the feasibility of 8QAM-OFDM signal is veri fied by illumination analysis. |
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| Keywords: | visible light communication orthogonal frequency division multiplexing (OFDM) rayleigh channel bit error rate (BER) |
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