Call on the plane, the Internet, use of mobile phones in the hospital equipment area or mine, tunnel, subway, smooth call ... a long time, this place is the communication technology covering blind spots or weak signal areas, in which all the communication needs, but also had to succumb to the current level of technology.
Are these communications "dead ends" I will never become blind?
The answer is no. The communication needs of people in these regions by the High Power LED 50W visible light communication to meet. "Department of Electronic Engineering, Tsinghua University, Professor Xu said that the realization of these ideas just around the corner, these scenes will be your work, life normal.
The visible light communication is a new dual function of white LED-based optical wireless communication technology, green lighting and communication can be achieved simultaneously, is one of the most popular research direction in wireless optical communication in recent years.
led 1w lamps have a high-speed electrical modulation performance by the naked eye can not detect the high-speed bright and dark signals to transmit information, this is the LED light to normal lighting display at the same time, as the communication light source visible pan-the root causes of the high-speed communications. In other words, as long as the place of the LED illumination, can be realized anytime, anywhere communications.
In addition, the LED visible light communication with high transmit power, do not take up the radio spectrum, and not subject to electromagnetic interference, distress, and electromagnetic radiation, the advantages of private security, energy conservation, significant savings in the cost of the communication system to improve the system capacity.
led 10w visible light communication research in foreign countries have more than 10 years of history, in some ways has a higher technical level. In China, this study has been achieved in certain results, but from the international advanced level and large-scale industrial applications, there are still some gaps.
Professor Xu Zhengyuan in order to promote the research and application of wireless optical communication technology, and in 2010 decided to return home. Prior to this, his U.S. more than a decade, then-University of California, a tenured professor in optical wireless communications, network technology and led power 10w intelligent lighting research successes. He even in 2009 led to the creation of a Pan, University of California, the Optical Communications Research Center, and served as director, has been supported by the U.S. Department of Defense and large enterprises, the development of the future is optimistic and broad.
Nevertheless, Professor Xu Zhengyuan chose to return home. 2010 in the country, "thousands of support, Professor Xu in Tsinghua University. Talking about the reasons, he said, to promote the development of the domestic LED visible light communication technology, in return for his alma mater, Tsinghua University, the cultivation of feelings.
After returning home, Professor Xu Zhengyuan quickly created at Tsinghua University Wireless Optical Information Systems Laboratory, using their own research experience, is committed to promoting research on the right track. Laboratory located in the scientific research covers a wide spectrum of wireless light wireless communications, networking, imaging, sensing, positioning / navigation, intelligent transportation, physical networking direction.
Professor Xu, at the same time, the use of their own overseas experience accumulated in more than a decade of research and a network of resources, led the laboratory in a short time with a number of international and domestic well-known scholars and related businesses to establish contact, and carried out extensive cooperation and exchanges.
Professor Xu Zhengyuan, research and application of visible light communication is not intended to replace the existing wireless technology, but applied to the occasions of the current sensitive to radio frequency wireless communication can not be implemented as they are an effective complement to the beginning of the article mentioned for security reasons Consider the hospital to block mobile phone signals, cabin, mine, signal attenuation strength subway tunnel, underwater.
It is understood that the aircraft during the flight does not allow the use of mobile phones because the phones emit radio signals can interfere with pilots and airport radio contact and the correctness of the aircraft compass pose a security risk. LED Flood lights light source that would not exist such problems, "on the plane just to install a central controller, LED reading light above the seats can be the connection of the communication signal as a network access point, not only can call but also the Internet. "Professor Xu Zhengyuan revealed that at present this technology in progress indicators of trial and error, the aircraft end of an era of no communication just around the corner.