As a brand leader in high-end LED devices and light engine lighting products, Jingke Electronics continues to improve its technology in more than a decade of innovation, from traditional dressing to LED flip-chip, from single lighting source to intelligent lighting systems and services. Innovative technologies and applications serve customers, academic institutions and industry. In the past two years, the concentration of LED industry has accelerated. Especially in the field of LED upstream chips, large-scale production is the first, the technology concentration is the highest, and the stability and quality of upstream products determine the stability of middle and downstream products. At present, the domestic packaging market has reached a stable period. Many small and medium-sized enterprises have been eliminated. The larger and larger Evergrande pattern has gradually emerged. The major enterprises in the LED industry have merged M&A or extended the industrial chain. This is an inevitable trend of industrial development. "Several large companies that have survived have stable customer sources and mature technologies. In the future, there is little chance of a significant price cut." Zheng Yongsheng, general manager of Jingke Electronics LED Division, told Gaogong LED. Compared with last year, this year, customers are more rational and demanding more and more quality, instead of blindly pursuing price, only quality can develop enterprises stably, and they are more attractive to customers. He said that on the one hand, Jingke Electronics never fights price wars, does not occupy the market at low prices, and adheres to the concept of “taking high quality as its own responsibilityâ€; on the other hand, the company has built a strong technical team, relying on many doctors. The technical operation team consisting of masters and masters, relying on independent development, has gradually mastered the core technology of the LED industry with international leading level. A few years ago, Jingke Electronics believed that the temptation to enter the high-end field and cross-border transformation did exist, but the risks involved in another field were also obvious. The management level of the enterprise, the risk resistance, and the degree of grasping the market in the new field were all It is a very big test and will not be easily involved. In the past two years, the LED industry has fallen into a development bottleneck under overcapacity and price competition. With the innovation of LED technology, the rise of the new blue ocean market has set a new dawn for the industry. At the annual summary meeting, Xiaoke Wei, president of Jingke Electronics, said that the more difficult the LED industry is, the more innovative technology is needed to create high-standard, high value-added products. Jingke Electronics will vigorously develop the world's leading third-generation semiconductor devices. And intelligent lighting, automotive lighting products market, to create high-end LED devices and light engine lighting products brand. With the development of the New Third Board, relevant institutions will introduce more policies to enable the listed new three-board enterprises to truly exert their own advantages, attract investment, and create opportunities for healthy development. Nowadays, although the number of cases involved in the high-end field is increasing, the risk has not been reduced. It is risky to get involved and develop high-end areas, and the action needs to be cautious. In the next two or three years, the company will expand the technology and management team composed of international high-end talents to accelerate investment in third-generation semiconductor devices, LED devices and intelligent products. As intelligence continues to evolve, different applications in the market will continue to emerge. But the promotion of the application requires a process that won't be a simple one. From January 5th to 6th, Gaogong LED will strive to create the “2016 High-tech LED Annual Meeting·Golden Ball Awards Ceremony and the 10th Anniversary of Higher Industry and Research (2006-2016). This annual meeting will be re-convergence. Domestic and foreign business leaders, in-depth analysis of overall industry opportunities and risks, comprehensive outlook on technology, market, capital, pattern and other trends, and seek the "decisive victory" of China and the global LED lighting industry in the next three years. At that time, Zheng Yongsheng, the general manager of Jinke Electronics LED Business Unit, will deliver a wonderful speech entitled "Technology Innovation is the New Power of LED Future Development", so stay tuned...
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It is widely regarded as high rate of 2 and good anti-multipath fading performance. In the future, RESEARCH related to OFDM technology will also be carried out in 5G communication networks. The main key technologies of 4G communication system include: a. OFDM technology; B. MIMO technology; C. Multi-user detection technology; D. Software radio; E. Smart antenna technology; F. IPv6 technology. China's Ministry of Industry and Information Technology has just issued 4G licenses to the three major operators, and they are still deploying their networks on a large scale with a small number of users. At this time, China Mobile said it will start the RESEARCH and development of 5G communication system. Analysts pointed out that the three major operators are participating in THE RESEARCH and development of 5G, one is to keep up with the changes of The Times, and the other is that the demand is faster than the technology development. Li Zhengmao, vice-president of China Mobile, said at the 2014 MWC in Barcelona: "China Mobile will fully support the development of 5G projects, hoping to lead the industry in THE development of 5G technology and the setting of technical standards." With the deepening of mobile communication technology research, the key support technologies of 5G will be gradually defined and enter the substantive standardization research and formulation stage in the next few years. The jury is still out on what core technologies will be used in the future. However, I have compiled a list of nine key technologies that have been the focus of discussion in various high-end mobile forums. A. Large-scale MIMO technology; B. Filter bank based multi-carrier technology; C. Full duplex technology; D. Ultra-dense heterogeneous network technology; E. Self-organizing network technology; F. Use of high frequency band; G. Software-defined wireless networks; H. Wireless access technology: (1) BDMA (Beam Split multiple Access technology)
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3 (2) NOMA (Non-orthogonal multiple Access technology) i. D2D (device-to-device) communication. Figure 1 is the layout of Massive MIMO antennas in 5G communication networks. I am studying Massive MIMO technology in my lab. Figure 1 shows users communicating with each other centered on a large-scale antenna. The performance of wireless communication systems is mainly restricted by mobile wireless channels. Wireless channel is very complex, and its modeling has always been a difficult point in system design. Generally, statistics are made according to the measured values of communication systems in specific frequency bands. Wireless fading channel is divided into large scale fading channel model and small scale fading channel model. The so-called large-scale fading model describes the field intensity variation over a long distance (hundreds or thousands of meters) between the transmitter and receiver, and reflects the rule that the received signal power changes with the distance caused by path loss and shadow effect. A small scale fading model describes the rapid fluctuations of the received field intensity over a short distance or time. The large scale fading channel model is caused by the influence of the surface contour (such as mountains, forests, buildings, etc.) between the receiver and the source. The small-scale fading channel model is caused by the multipath effect and doppler effect. If there are a large number of reflected paths but no LOS (direct signal) signal component, the small-scale fading is called Rayleigh fading, and the envelope of the received signal is described statistically by the Rayleigh probability density function. If LOS is present, the envelope is subject to Rician distribution. Multipath effect phenomena cause flat fading and frequency selective fading.
