| 大功率LED脉冲位置调制解调设计 |
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| 引用本文： | 谭家杰,杨克成,夏珉.大功率LED脉冲位置调制解调设计[J].光学与光电技术,2011(5):75-78. |
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| 作者姓名： | 谭家杰 杨克成 夏珉 |
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| 作者单位： | 武汉光电国家实验室(筹)华中科技大学光电子科学与工程学院;衡阳师范学院物理与电子信息科学系 |
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| 摘 要： | 脉冲位置调制是室内可见光通信的主要调制方式之一,它具有功率利用率高,频带利用率好,抗干扰性强的特点.为实现室内大功率白光LED照明通信,在分析PPM的原理基础上提出了一种改进的调制方式,给出了这种PPM符号的结构,并设计了大功率LED的驱动电路.其主要特点是由单片机直接输出帧同步信号加PPM信号,不设置保护时隙,其利用...
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| 关 键 词： | 大功率LED 脉冲位置调制 微处理器 LED驱动 |
Design of Pulse Position Modulation with High Power LED |
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| TAN Jia-jie,YANG Ke-cheng,XIA Min.Design of Pulse Position Modulation with High Power LED[J].optics&optoelectronic technology,2011(5):75-78. |
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| Authors: | TAN Jia-jie YANG Ke-cheng XIA Min |
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| Affiliation: | 1 (1 Wuhan National Laboratory for Optoelectronics,School of Optoelectronics Science and Engineering, Huazhong University of Science and Technology,Wuhan 430074,China; 2 Department of Physics and Electronic Information Science,Hengyang Normal University,Hengyang 421008,China) |
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| Abstract: | Pulse position modulation(PPM) is the most popular modulation for indoor visible light communication with high power LED,which has the advantage of high efficient of power,low bandwidth and performance of anti-interference.In order to implement indoor visible light communication with high power LED as well as indoor lighting,the paper presents an improved PPM by analysis on the principle of regular modulator approach,and gives the scheme of the PPM symbol,also has designed the driving circuit of high power LED.Its main characteristics are directly output the PPM signal and the frame synchronization signal by microchip controller.There is no protection time slot,and transmits information without sending light pulse.The experimental results show that the PPM modulation can be lamination and communications. |
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| Keywords: | high power LED pulse position modulation microchip controller LED driving circuit |
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