共查询到19条相似文献,搜索用时 46 毫秒
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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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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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张业建 《电子技术与软件工程》2015,(17):82-84
本文介绍白光LED照明通信系统的原理、研究进展情况,探索利用该系统构建室内无线局域网通信系统的方法,并分析了系统的可行性及需要解决的关键技术,讨论了一些可能的解决方案。 相似文献
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张业建 《电子技术与软件工程》2015,(17):82-84
本文介绍白光LED照明通信系统的原理、研究进展情况,探索利用该系统构建室内无线局域网通信系统的方法,并分析了系统的可行性及需要解决的关键技术,讨论了一些可能的解决方案。 相似文献
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光通信系统属于新兴的技术,其具有发射效果良好和受到影响相对较小等特点。本文主要对白光LED室内可见光通信系统进行简介,并且对其关键技术进行探析。以期通过本文的相关介绍,可以为科研人员带来相应的启示,继而可以更好的促进光通信技术的发展。 相似文献
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可见光通信及其关键技术研究 总被引:8,自引:2,他引:8
可见光通信系统采用白光发光二极管(LED)作为光源,因而系统具有通信与照明的双重作用,极大地节约了能源.描述了可见光通信的结构与特点,对可见光通信的一些关键技术做了简单的研究,并介绍了可见光通信的发展动态. 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
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A Study of Shadowing on Indoor Visible-Light Wireless Communication Utilizing Plural White LED Lightings 总被引:2,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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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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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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认为随着固体照明技术在世界范围的广泛应用,可见光通信已引起学术界和产业界高度关注,并逐渐取得小部分市场,但要真正大规模应用,还需综合考虑技术演进规律,并在国家和地方政府政策扶植下,加强产学研合作,共同推进LED信息化技术应用进程。 相似文献
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为了解决可见光通信发射系统中光信号直接加载到白光LED的驱动电路上产生的驱动电流不稳定、不可预测的噪声、灯光闪烁的问题,提出了一种应用在可见光通信发射系统中的双调制方法。内部调制采用PWM载波编码调制,解决灯光闪烁问题,外部调制采用一个由铌酸锂材料制成的调制外壳,解决了驱动电流不稳定,噪声的问题。实验表明,这种双调制方法具有实践价值。 相似文献
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多芯片阵列组合白光LED封装研究 总被引:1,自引:1,他引:1
文章阐述了LED器件的发光原理和芯片电极结构,围绕白光HB-LED的封装工艺,设计单个大功率芯片封装结构并对整个封装工艺进行研究,提出了多芯片阵列组合封装的创新理念,将其应用于多芯片阵列封装模块中。得出HB-LED封装中关键技术问题是提高外量子效率,采用高折射率硅胶减少折射率物理屏障带来的光子损失;采用高热导率的材料,减少由于封装工艺的缺陷带来的界面热阻。 相似文献