基于RGB型LED的光学相机通信系统的实现方案
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摘要
针对可见光-光学相机通信技术的实现,提出了一种传输速率及信息容量高效的可见光通信系统解决方案。该方案采用RGB型LED作为信源发射机,通过波分复用的方式可有效提高系统传输速率及信息容量,接收端以Android智能手机搭载光学相机作为接收机,利用手机相机的卷帘快门工作特性实现信息的接收。对于信息接收解码,设计了基于Java语言可独立运行的Android APP,通过引入直方图均衡化、最小二乘拟合等技术有效地抑制了接收图像的光晕效应,并且提出的同步动态补偿技术有效地提高了信息传输的可靠性。实验表明:提出的方案可在Android智能手机上实现传输速率为21.6kb/s的信息传输。
In view of the realization of visible light-optical camera communication technology, this paper proposes a scheme of visible light communication system to increase transmission rate and transmission capacity. In this scheme, RGB-LED is used as the source transmitter, which can effectively increase the system transmission rate and transmission capacity via wavelength division multiplexing. The receiving end is equipped with an optical camera as an receiver on an Android smartphone, and uses the rolling shutter mechanism of the mobile-phone camera to receive information. In view of the process of the information receiving and decoding, this paper designs an Android APP which can run independently based on Java language. By introducing histogram equalization, least squares fitting and other techniques, the blooming effect of the received image is effectively overcome, and the proposed synchronous dynamic compensation technique effectively improves the reliability of information transmission. The experimental show that the proposed scheme can realize the transmission of information with a transmission rate of 21.6 kb/s on the Android smartphone.
In view of the realization of visible light-optical camera communication technology, this paper proposes a scheme of visible light communication system to increase transmission rate and transmission capacity. In this scheme, RGB-LED is used as the source transmitter, which can effectively increase the system transmission rate and transmission capacity via wavelength division multiplexing. The receiving end is equipped with an optical camera as an receiver on an Android smartphone, and uses the rolling shutter mechanism of the mobile-phone camera to receive information. In view of the process of the information receiving and decoding, this paper designs an Android APP which can run independently based on Java language. By introducing histogram equalization, least squares fitting and other techniques, the blooming effect of the received image is effectively overcome, and the proposed synchronous dynamic compensation technique effectively improves the reliability of information transmission. The experimental show that the proposed scheme can realize the transmission of information with a transmission rate of 21.6 kb/s on the Android smartphone.
引文
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[11]李卓龙,王旭东,张思雨,等.基于广义空间调制的VLC调制方式研究[J].光通信技术,2018,42(6):33-37.
[2]汪广业,高英明,王金鹏,等.RGB LED可见光通信系统性能的仿真研究[J].光通信技术,2015,39(10):41-43.
[3]CHEN S H,CHOW C W.Color-filter-free WDM MIMO RGB-LED visible light communication system using mobile-phone camera[C]//International Conference on Optical Communications&Networks,November 9-10,2014,Suzhou,China.Piscataway:IEEE,2014.
[4]孙洪伟,王旭东,吴楠.一种基于智能手机的可见光室内信标定位方法[J].光通信研究,2017(1):72-75.
[5]RYU W J,SHIN S Y.RGB MIMO optical camera communication with Histogram equalization[C]//International Conference on Signals and Systems,May16-18,2017,Sanur,Indonesia.Piscataway:IEEE,2017.
[6]DO T H,YOO M.Analysis on visible light communication using rolling shutter CMOS sensor[C]//International Conference on Information and Communication Technology Convergence,October 28-30,2015,Jeju,South Korea.Piscataway:IEEE,2015.
[7]GUAN W,WU Y,XIE C,et al.Performance analysis and enhancement for visible light communication using CMOS sensors[J].Optics Communications,2018(410):531-545.
[8]LEE H Y,LIN H M,WEI Y L,et al.Rolling Light:Enabling Line-of-Sight Light-to-Camera Communications[C]//International Conference on Mobile Systems,May 18-22,2015,Florence,Italy.New York:ACM,2015.
[9]陈泉润,崔钊,张涛,等.基于CMOS传感器的光ID信息服务系统模型[J].半导体光电,2016,37(6):853-857.
[10]旷亚和.基于LED的无线数据传输技术研究与设计实现[D].大连:大连海事大学,2014.
[11]李卓龙,王旭东,张思雨,等.基于广义空间调制的VLC调制方式研究[J].光通信技术,2018,42(6):33-37.