summary 3GPP defines 5g NR new generation wireless communication technology from R15 protocol. By introducing new air interface and new architecture, 3GPP makes the bandwidth larger and spectrum efficiency higher, so as to greatly improve the wireless c

The river flows eastward The stars in the sky participate in the Big Dipper It's 9:43 today Beidou global navigation system The closing star was successfully launched! The closing star of Beidou 3 ignited and took off.

On June 18, the founding meeting of China Mobile 5g smart mine alliance and the completion ceremony of the country's first 5g coal mine were held in Taiyuan, Shanxi Province, and video connection was made with the Beijing Branch venue. At the meeting,

The new industrial revolution is coming. In recent years, many countries have put forward their own industrial transformation and upgrading development strategies and names, such as industry 4.0 in Germany and intelligent manufacturing in China. However,

Summary: With the continuous development of mobile communication network, operators have different frequency band resources of high, medium and low. Radio band resources are valuable strategic resources. How to make rational and efficient use of spec

lately After the flood and rainstorm in South China, a sudden landslide collapsed in Shimen County, Hunan Province. Fortunately, there were no casualties because Before the landslide Shimen County fourteen household thirty-three p

GlobalfourAnalysis of large satellite navigation system Abstract: in order to further study the satellite navigation system, the four existing global satellite navigation systems are compared and analyzed: from the aspects of constellation, signal

Although it is 2018, when talking about the "Beidou system", many people's impression may still stay in 2008 - during the Wenchuan earthquake relief, Beidou generation equipment sent the first message from the earthquake area. Gener

On July 31, the beidou-3 global satellite navigation system was officially completed and put into operation. We also have a big move - Chihiro positionTo promote Beidou high precisionThe large-scale application of positioning technology in the field of in

The basic structure of coaxial connector includes: central conductor (male or female central contact); Dielectric materials, or insulators, inside and outside the body; The outermost part is the outer contact, which plays the same role as the outer shield

Although it is 2018, when talking about the "Beidou system", many people's impression may still stay in 2008 - during the Wenchuan earthquake relief, Beidou generation equipment sent the first message from the earthquake area. Gener

What if you get lost somewhere on earth? By GPS? Okay, but what if there's no signal, no equipment? A map? Good idea, but what if you travel on the high seas and can't see landmarks? For thousands of years, many people have found this problem. The