共查询到15条相似文献,搜索用时 78 毫秒
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LED照明具有节能、可靠、使用寿命长等特点,被认为是下一代主流照明技术。基于LED比荧光灯和白炽灯切换速度快的特性,用室内照明的白光LED光源作为通信基站进行信息无线传输的技术,就是现在国内外研究的热点技术-可见光通信技术。文章简要介绍了白光LED可见光无线通信技术在的研究现状,分析了它的关键技术,并从应用角度出发阐述了LED可见光无线通信技术的发展趋势。 相似文献
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可见光通信是一项新兴基于白光LED的无线光通信技术,具有发射功率高、不占用无线电频谱、无电磁干扰、无电磁辐射和节约能源等优点,能够同时实现照明和通信的双重功能。阐述了可见光通信技术的发展动态,介绍基于白光LED的室内可见光通信系统,并对提高系统整体性能的若干关键技术进行了研究讨论,为白光LED室内可见光通信系统进一步研究提供依据。 相似文献
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基于白光LED的可见光通信研究进展 总被引:1,自引:0,他引:1
白光LED将成为未来主要的照明光源,这使得基于白光LED的可见光通信(VLC)在通信网络中具有一定的优势。介绍了可见光通信系统的优势及发展概况,分析了包括通信速率的提高、全双工通信的实现以及与现有通信网络互联等关键技术,综述了可见光通信技术的应用现状,并展望了可见光通信技术的应用前景。 相似文献
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白光LED将成为未来主要的照明光源, 这使得基于白光LED的可见光通信(VLC)在通信网络中具有一定的优势。介绍了可见光通信系统的优势及发展概况, 分析了包括通信速率的提高、全双工通信的实现以及与现有通信网络互联等关键技术, 综述了可见光通信技术的应用现状, 并展望了可见光通信技术的应用前景。 相似文献
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基于白光LED提出一种可见光通信(Visible Light Communication,VLC)系统设计方案。详细给出了该方案的系统原理与组成、可见光通信发射机设计和可见光通信接收机设计,并给出了信号光/电转换、电信号调制/解调以及最终将传输的数据信息解调还原出来的详细过程。测试结果表明,该系统实现了可见光数据传输的功能,具有通信距离远、可靠性高及体积小等优点。 相似文献
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A Study of Shadowing on Indoor Visible-Light Wireless Communication Utilizing Plural White LED Lightings 总被引:3,自引:1,他引:2
Toshihiko Komine Shinichiro Haruyama Masao Nakagawa 《Wireless Personal Communications》2005,34(1-2):211-225
White LED is considered as a strong candidate for the future lighting technology. We have proposed an optical wireless communication
system that employs white LEDs for indoor wireless networks. In this system, LED is used not only as a lighting device, but
also as a communication device. The transmitter has large optical power and large emission characteristics to function as
lighting device. And the system has specific wireless channel impulse response differing from infrared wireless communication.
In this paper, we discuss about shadowing effect on the system utilizing plural LED lightings including the performance of
ISI based on the impulse response. We consider the downlink transmission based on TDMA and evaluate the shadowing effect caused
by pedestrians with computer simulation. When the shadowing often occurs at 800 Mb/s, the performance of outage call duration
rate and blocking rate are improved by using 3 LED lightings compared with 1 or 2 LED lightings. And, we show that the system
with the optimal number of the LED lighting is robust against shadowing and can accommodate more calls.
Toshihiko Komine was born in Shizuoka, Japan, on November 17, 1978. He received the B.E. and M.E. degrees in Information and Computer Science
from Keio University, Yokohama, Japan, in 2001 and 2003 respectively. He is currently studying for the Ph.D. degree at Department
of Information and Computer Science, Keio University. His current research interests are optical wireless communications and
LED communications.
Shinichiro Haruyama is a professor at Department of Information and Computer Science, Faculty of Science and Technology, Keio University, Yokohama,
Japan. He received an M.S. in engineering science from University of California at Berkeley in 1983 and a Ph.D. in computer
science from the University of Texas at Austin in 1990. He worked for Bell Laboratories of AT{&}T and Lucent Technologies,
U.S.A from 1991 to 1996, and for Sony Computer Science Laboratories, Inc. from 1998 to 2002. His research interests include
reconfigurable system, system design automation, wireless communication, and visible light communication.
Masao Nakagawa was born in Tokyo, Japan in 1946. He received the B.E., M.E. and Ph.D. degrees in electrical engineering from Keio University,
Yokohama, Japan, in 1969, 1971 and 1974 respectively. Since 1973, he has been with the Department of Electrical Engineering,
Keio University, where he is now a Professor. His research interests are in CDMA, consumer Communications, Mobile communications,
ITS (Intelligent Transport Systems), Wireless Home Networks, and Visible light Communication. He received 1989 IEEE Consumer
Electronics Society Paper Award, 1999-Fall Best Paper Award in IEEE VTC, IEICE Achievement Award in 2000, IEICE Fellow Award
in 2001. He was the executive committee chairman on International Symposium on Spread Spectrum Techniques and Applications
in 1992 and the technical program committee chairman of ISITA (International Symposium on Spread Spectrum Techniques and Applications)
in 1994. He is an editor of Wireless Personal Communications and was a guest editor of the special issues on “CDMA Networks
I, II, III and IV” published in IEEE JSAC in 1994 (I and II) and 1996 (III and IV). He chairs the Wireless Home Link sub-committee
in MMAC (Multimedia Mobile Access Communication Promotion Committee). 相似文献
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为了研究室内多个白光LED构成的室内无线信道的特性,首先分析了多LED通信系统的基本构成,然后分析了光线追迹法求脉冲响应的基本原理和基本方法,提出了用简化的光线追迹法计算信道的脉冲响应,这种方法仅仅考虑三次以下的反射情况.最后,用数值仿真方法对室内信道的脉冲响应进行了研究.仿真结果表明,系统的脉冲响应以直接响应和一阶响应为主,并随接收器和发射装置的位置不同而发生变化. 相似文献
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可见光通信是基于白光LED的新兴无线光通信技术,能够同时实现照明和通信的双重功能,适合在智能家居等领域的应用。本文对基于白光LED的室内可见光通信的研究现状及关键技术、发展趋势进行了研究。 相似文献
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随着信息技术的不断发展,通信技术水平越来越高.近年来不少学者对LED光通信进行研究,实现了基于LED的电光信号转换、光信号传输接收以及光电信号解析,达到了数字信息通信的效果.因此,给出了一种基于LED可见光的网络通信系统设计方法,描述网络通信系统架构,阐述LED光通信网络节点、网络层次结构以及网络传输协议等技术. 相似文献