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On December 4, the Ministry of Industry and Information Technology officially issued TD-LTE 4G licences to China Mobile, China Telecom and China Unicom, and China officially entered the era of 4G. According to a report by GSMA Intelligence, a third-party analyst, more than 128 countries will deploy about 500 LTE networks by the end of 2017. 4G not only provides more bandwidth and brings better mobile Internet experience to people, but also challenges the carrier's mobile bearer network.With the issuance of 4G licenses in China, the LTE network will be deployed quickly. However, LTE base station coverage is small, deployment density is much higher than GSM base station and 3G base station, LTE construction will face a large number of new site demand, and part of the new site shortage of...
发布时间: 2018 - 10 - 18
浏览次数:17
On December 4, the Ministry of Industry and Information Technology officially issued TD-LTE 4G licences to China Mobile, China Telecom and China Unicom, and China officially entered the era of 4G. According to a report by GSMA Intelligence, a third-party analyst, more than 128 countries will deploy about 500 LTE networks by the end of 2017. 4G not only provides more bandwidth and brings better mobile Internet experience to people, but also challenges the carrier's mobile bearer network.With the issuance of 4G licenses in China, the LTE network will be deployed quickly. However, LTE base st...
发布时间: 2018 - 10 - 18
浏览次数:17
For a long time, WX communication has played an important role in field exploration, border patrol, earthquake relief and other activities because of its advantages of wide coverage, flexible networking and not limited by geographical environment.However, due to the insufficient number of small terminals, various types of equipment, and the lack of interconnection and interoperability, the rapid mobile communication needs of rescue teams are still not met.Against this background, the WX mobile system came into being. This article will give you a detailed explanation of the origin and developme...
发布时间: 2018 - 10 - 17
浏览次数:29
With the rapid development of mobile broadband, the network capacity is growing rapidly. As one of the main return modes of bearer network, microwave network is facing the dual challenges of super-large service capacity and densely deployed stations. Traditional band microwave (6-42GHz) spectrum resources are becoming increasingly scarce, bandwidth capacity is limited, it is difficult to meet the G-bit-level large bandwidth stations to return the demand, and E-Band microwave (80GHz) because of its rich bandwidth resources, large transmission capacity, low spectrum usage fees and high-frequency...
发布时间: 2018 - 10 - 17
浏览次数:6
With the rapid development of artificial intelligence technology and its gradual application in the military field, intelligent radar and intelligent radar technology have attracted wide attention at home and abroad. Strengthening the research of intelligent radar and its key technology is not only the need of radar technology development, but also the key to improve radar combat capability.1. IntroductionTraditional radar works mainly according to the pre-designed working mode. It has no ability to change the working mode automatically with the change of the target and environment, and it has...
发布时间: 2018 - 10 - 17
浏览次数:11
Antenna system is composed of transmitting antenna and receiving antenna. The former is a transmission mode converter that converts the radio frequency current or electromagnetic wave of guided wave mode into the space electromagnetic wave of diffuse wave mode, and the latter is a transmission mode converter of inverse transformation.As the transmitting antenna used in the mode conversion of guided traveling wave to diffusion wave, the receiving antenna I used in the mode conversion of diffusion wave to guided traveling wave is called reciprocity theorem, except that the transmitting antenna&#...
发布时间: 2018 - 10 - 17
浏览次数:19
On April 2, 2018, after accurate calculation and monitoring analysis by the Beijing Space Flight Control Center, Tiangong I re-entered the atmosphere at about 8:15 on the same day, landing in the central South Pacific Ocean, and finally achieved a perfect farewell with its gorgeous posture. On September 29, 2011, at 21:16:03, Jiuquan Satellite Launch Center launched, from this moment on the sky belongs to China's target aircraft and space laboratory. The name "Tiangong" is mainly to cater to the diligent pursuit of unknown space in Chinese traditional mythology. The ancients...
发布时间: 2018 - 10 - 17
浏览次数:13
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