Hearing Shang Yiyun's words, Qin Tianhao's heart twitched a little, he really wanted to say to Shang Yiyun, 'Big brother, you are only a freshman, you have such an ability, what else do you want.' But that's just a matter of thinking about it.

However, he was also very happy about this situation.

Qin Tianhao knew in his heart that his teacher Chen Dezhi's wish was to cultivate an academician of the Chinese Academy of Sciences and the Chinese Academy of Sciences, but the academician of the Chinese Academy of Sciences and the Chinese Academy of Sciences is a holy place that everyone in the scientific research community yearns for, and it is the top existence of scientific researchers.

Even Chen Dezhi, who has a lot of deep research in the field of neutrons, is only a scholar of the Thousand Talents Program, and he can be regarded as standing at the top of the scientific research community, but he did not become an academician of the Chinese Academy of Sciences and the Chinese Academy of Sciences, and the other party still has some regrets.

So he put his hope on his students, and although Chen Dezhi has led many students over the years, the highest achievers are only Changjiang Scholars.

At this time, Qin Tianhao saw hope from Shang Yiyun and became an academician of the Chinese Academy of Sciences and the Chinese Academy of Sciences.

"Little junior brother, I didn't expect me to look away, your understanding of communication technology is no worse than that of some master's students who have studied for two or three years. Speaking of this, Qin Tianhao had a faint sadness in his heart.

I think that back then, when he was in college, he took one step at a time, four years of undergraduate, five years of master's and doctoral studies, and taught at the school after graduation, so that he had his current achievements.

My little junior brother, who is just a freshman now, has such knowledge, and you can imagine what will happen in a few years.

After the Q&A just now, Shang Yiyun also learned a lot of things, although his answer was relatively perfect, but there were still some flaws, Qin Tianhao added these flaws at the same time, he would also involve some other aspects of knowledge.

The mind moved slightly, and a high-tech panel appeared in front of him.

Linguistics: Master's level (53432/100000)

Mathematics: Master's level (75423/100000)

Philosophy: Master's level (32313/100000)

Physics: Master's level (66734/100000)

Chemistry: Master's level (33212/100000)

Biology: Master's level (35253/100000)

Fine Arts: Master's Level (38743/100000)

It can be seen that every subject has grown, especially physics, with the largest increase, and for this situation, Shang Yiyun also knows in his heart that he has basically focused on mathematics and physics during this time, and it is not surprising that there is such an increase.

Since chatting with Qin Tianhao in the library for a while, if there is a problem that cannot be solved for a long time, he will chat with the other party on WeChat and ask for help.

The other party is worthy of being a small achiever in the field of communication technology, and general problems can be solved.

During this time, Shangyi Cloud has also improved very rapidly, during this period, I have done some experiments, verified my ideas, and have a great understanding of 5G communication technology, and is now preparing a paper.

The content is the principle of 5G communication technology, and he has personally conducted experiments on some of the data to ensure the authenticity of the data.

In the research and development of 5G communication technology, the key technologies are wireless transmission technology and network technology.

(1) Massive MIMO technology: The base station uses dozens or hundreds of antennas, narrow beams, directional transmission, high gain, anti-interference, and improved spectral efficiency.

(2) Non-orthogonal multiple access technology: NOMA, MUSA, PDMA, SCMA and other non-orthogonal multiple access technologies to further improve the system capacity. Supports uplink unscheduled transmission, reduces air interface latency, and adapts to low latency requirements.

(3) Full-duplex communication technology: It is a physical layer technology that realizes the simultaneous and two-way transmission of information at the same frequency through multiple interference elimination, which is expected to double the capacity of the wireless network.

(4) New modulation technology: the filter bank is orthogonal and frequency division multiplexing, which supports flexible parameter configuration, and configures different carrier spacing according to needs to adapt to different transmission scenarios.

(5) New coding technology: LDPC coding and polar code, high error correction performance, high-order modulation technology: 1024QAM modulation, improve spectrum efficiency.

These are the five specific wireless transmission technologies, for these technologies, Shangyiyun used the laboratory of Kyoto University to do experiments and obtain some experimental data.

Here are three specific technologies for network technologies.

(1) Network slicing technology: Based on NFV and SDN technology, network resource virtualization provides resources for different users and different services, optimizes end-to-end service experience, and has better security isolation characteristics.

(2) Edge computing technology: provides carrier-class computing and storage resources at the edge of the network, localizes service processing, reduces backhaul link compliance, and reduces service transmission delay.

(3) Service-oriented network architecture: The core network of 5G is built with a service-oriented architecture, which has smaller resource granularity and is more suitable for virtualization. At the same time, the service-based interface definition is more open and easy to integrate more services.

5G is an extension of 4G and is the fifth-generation mobile communication standard, also known as the fifth-generation mobile communication technology.

Therefore, these wireless transmission technology and network technology technical difficulties, to a certain extent, and 4G technology figured out, can be said to be an upgraded version of some 4G technology.

These technical difficulties, in two months, Shang Yiyun has a great understanding, but to let him really develop it, there is no such ability.

With what he now knows, there is no problem in completing a dissertation.

Half a month ago, he started the creation of the paper, a first draft of a 6,000-word paper, it took him half a month, and then, there are many things, after all, it is only the first draft of a paper that has been completed, and a series of problems such as repetition rate and revision need to be checked later.

In the past two months, nothing major has happened, when there will be activities in the Youth Astronomy, he will participate, and as for other free time, Shang Yiyun will choose to spend it in the library, or go to class, and his knowledge points have also improved a lot.

5G communication technology involves too many technologies, and he no longer has the original ambition.

Shang Yiyun now knows that he was too simple before, and he developed 5G communication technology, but he was a little arrogant with his knowledge level that has not yet reached the doctoral level.

However, after this period of research, he has also gained a lot, and at least there is no problem in completing an academic paper.

This paper will become a stepping stone for him to enter the academic world.

At this time, he remembered that when he brought the first draft of the paper to Chen Dezhi for review, the other party's expression was clearly a kind of surprise.

Two months ago, Chen Dezhi didn't think that Shang Yiyun could achieve anything, in his heart, the other party could learn something, but he didn't expect Shang Yiyun to give him such a big surprise.

Chen Dezhi is very glad that he broke the routine and accepted Shang Yiyun as his student, and now it seems that it is a very good move.

"Yi Yun, I really didn't expect that you would grow to such a point now. ”

After saying this, Chen Dezhi looked at something in the office.