| 基于DCO-OFDM水下可见光通信系统的预均衡技术 |
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| 引用本文： | 阎威龙,李晓记,王俊华,李燕龙,杜卫海,高天.基于DCO-OFDM水下可见光通信系统的预均衡技术[J].光通信技术,2021,45(4):12-15. |
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| 作者姓名： | 阎威龙 李晓记 王俊华 李燕龙 杜卫海 高天 |
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| 作者单位： | 桂林电子科技大学信息与通信学院,广西桂林541004;认知无线电与信息处理教育部重点实验室,广西桂林541004;认知无线电与信息处理教育部重点实验室,广西桂林541004 |
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| 基金项目： | 国家自然科学基金(61761014)资助;教育部第二批“新工科”研究与实践项目(E-XTYR20200653)资助;教育部高等学校电子信息类教学指导委员会2020年度教学改革研究重点项目(2020-ZD-02)资助;教育部产学合作协同育人项目(201902180021、202002078046)资助。 |
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| 摘 要： | 针对硬件预均衡技术和基于有限脉冲响应(FIR)滤波器的软件预均衡技术存在的问题,提出了数字预加重的软件预均衡技术,该技术根据发光二极管(LED)的频率响应参数针对性地补偿LED带宽,并设计了一套直流偏置光-正交频分复用(DCO-OFDM)水下可见光通信系统作为实验测试平台。实验结果表明:采用数字预加重技术后,LED调制带宽由7.8 MHz提升至了16 MHz,且该技术实现复杂度低、灵活性强,预均衡后的信号频谱更加平坦。
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| 关 键 词： | 水下可见光通信 直流偏置光-正交频分复用 发光二极管 预均衡 数字预加重 |
Pre-equalization technology based on DCO-OFDM underwater visible light communication system |
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| YAN Weilong,LI Xiaoji,WANG Junhua,LI Yanlong,DU Weihai,GAO Tian.Pre-equalization technology based on DCO-OFDM underwater visible light communication system[J].Optical Communication Technology,2021,45(4):12-15. |
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| Authors: | YAN Weilong LI Xiaoji WANG Junhua LI Yanlong DU Weihai GAO Tian |
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| Affiliation: | (College of Information and Communication,Guilin University of Electronic Technology,Guilin Guangxi 541004,China;Ministry of Education Key Lab of Cognitive Radio and Information Processing,Guilin Guangxi 541004,China) |
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| Abstract: | Aiming at the problems of hardware pre equalization technology and software pre-equalization technology based on finite impulse response(FIR)filter,a digital pre-emphasis software pre-equalization technology is proposed.The technology compensates the LED bandwidth according to the frequency response parameters of light-emitting diode(LED),and designs a direct-current biased optical orthogonal frequency division multiplexing(DOC-OFDM)underwater visible light communication system as an experimental test platform.The experimental results show that the modulation bandwidth of LED is increased from 7.8 MHz to 16 MHz by using digital pre-emphasis technology,and the implementation complexity of this technology is low,the flexibility is strong,and the signal spectrum after pre-equalization is more flat. |
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| Keywords: | underwater visible light communication direct-current biased optical orthogonal frequency division multiplexing light-emitting diode pre-equalization digital pre-emphasis |
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