一种室内可见光通信亮度控制方法
A brightness control method for indoor visible light communications
查看参考文献22篇
文摘
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为了解决室内无线可见光通信中照明光源亮度不稳定的问题,提出了一种新型的以脉冲宽度调制(PWM)波形作为载波的编码调制方法,设计了基于该方法的发射器和接收器。PWM波形在逻辑1和逻辑0时的载波占空比相同,频率分别为38 kHz和7 kHz。发射端采用高亮度白光LED作为光源,接收端采用PIN光电二极管和低噪声放大器作为前置放大器部分。PWM波形的生成、编码与解码,分别通过发射和接收端的微控制器实现。实验结果表明,使用PWM波形作为载波的编码调制方法可以控制光源亮度变化范围达1.598.5%,占空比下降到6%时接收的电压信号强度仅下降18%,光源亮度稳定,满足可见光通信光源亮度稳定、可调的要求。 |
其他语种文摘
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In order to solve the problem of instability of illumination brightness in visible light communications,a novel coding modulation method using pulse width modulation(PWM)waveform as carrier is proposed.A transmitting and receiving module based on this method is designed.The frequencies of PWM waveform at logic 1 and logic 0 are 38 kHz and 7 kHz,respectively.A high brightness light-emitting diode(LED)was used as source,a current input preamplifier composed of a PIN photodiode and low a noise wide-bandwidth amplifier was designed in the receiver module,and the encoding and decoding were implemented by micro-controller.Experimental results indicate that the brightness will range from 0% to 100% using the PWM waveform coding modulation method,and when the PWM waveform duty cycle is below 6%,the received voltage only decreases by 18%,and the illumination brightness is stable.It can satisfy the system requirements of adjustability and stability of for the illumination brightness. |
来源
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光电子·激光
,2011,22(7):1013-1017 【核心库】
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关键词
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可见光通信
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室内照明
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脉冲编码调制(PWM)
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亮度控制
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高亮度白光LED
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地址
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中国科学院半导体研究所, 集成光电子学国家重点联合实验室, 北京, 100083
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语种
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中文 |
文献类型
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研究性论文 |
ISSN
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1005-0086 |
学科
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电子技术、通信技术 |
基金
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国家科技支撑计划项目
;
中国科学院知识创新工程重要方向项目
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文献收藏号
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CSCD:4256843
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参考文献 共
22
共2页
|
1.
白生茂. 一种红光增强型白光LED特性研究.
光电子·激光,2010,21(9):1298-1300
|
被引
10
次
|
|
|
|
2.
周龙早. 荧光层形状对大功率白光LED光学性能的影响.
光电子·激光,2010,21(2):175-177
|
被引
6
次
|
|
|
|
3.
Park S B. Information broadcasting system based on visible light signboard.
Proceedings of the 7th IASTED International Conferences on Wireless and Optical Communication,2007:311-313
|
被引
1
次
|
|
|
|
4.
Lee I E. Performance enhancement of outdoor visible-light communication system using selective combining receiver.
IET Optoelectronics,2009,3(1):30-39
|
被引
7
次
|
|
|
|
5.
Brien D C. Visible light communications:challenges and possibilities.
IEEE19th International Symposium on Personal,Indoor and Mobile Radio Communications,2008:1-5
|
被引
1
次
|
|
|
|
6.
Yang Y U. Design of indoor wireless communication system using LEDs.
Communications and Photonics Conference and Exhibition(ACP),2009:1-2
|
被引
1
次
|
|
|
|
7.
Little T D C. Using LED lighting for ubiquitous indoor wireless networking.
IEEE International Conference on Wireless and Mobile Computing,Networking and Communications,2008:373-378
|
被引
1
次
|
|
|
|
8.
Saito T. A new tracking method using image sensor and photo diode for visible light road-to-vehicle communication.
10th International Conference on Advanced Communication Technology,2008:673-678
|
被引
1
次
|
|
|
|
9.
Liu Xiaohan. Basic study on robot control in an intelligent indoor environment using visible light communication.
IEEE International Symposium on Intelligent Signal Processing,2009:323-325
|
被引
2
次
|
|
|
|
10.
Tanakat Y. Wireless optical transmissions with white colored led for wireless home links.
IEEE11th International Symposium on Personal,Indoor and Mobile Radio Communications,2000:8-12
|
被引
1
次
|
|
|
|
11.
Komine T. Fundamental analysis for visible-light communication system using LED lights.
IEEE Transactions on Consumer Electronics,2004,50(1):100-107
|
被引
193
次
|
|
|
|
12.
Ding Deqiang. A new indoor VLC channel model based on reflection.
Optoelectronics Letters,2010,6(4):0295-0298
|
被引
1
次
|
|
|
|
13.
丁德强. VLC系统的光源布局设计与仿真研究.
光电工程,2007,34(1):131-134
|
被引
17
次
|
|
|
|
14.
Ding Jupeng. Independent reflecting element interaction characterization for indoor visible light communication based on new generation lighting.
Chinese Optics Letters,2010,8(12):1182-1186
|
被引
3
次
|
|
|
|
15.
丁德强. 可见光通信及其关键技术研究.
半导体光电,2006,27(2):114-117
|
被引
21
次
|
|
|
|
16.
朱琳. 一种基于半导体照明的无线通信系统.
高技术通讯,2010,20(8):863-867
|
被引
6
次
|
|
|
|
17.
刘博. 室内半导体照明通信中的光强稳定技术.
光电子·激光,2010,21(12):1794-1797
|
被引
8
次
|
|
|
|
18.
Kahn J M. Wireless infrared communications.
Proceedings of the IEEE,1997,85(2):265-298
|
被引
109
次
|
|
|
|
19.
孙丽飞. 基于半导体致冷器的高精度PWM功率驱动器.
光电子·激光,2004,15(9):1026-1030
|
被引
7
次
|
|
|
|
20.
叶向阳. 射频激励CO_2激光器功率控制及其控制器设计.
光电子·激光,2001,12(2):151-153
|
被引
2
次
|
|
|
|
|