The Science Fiction World of Xueba - Chapter 469

The following week, Pang Xuelin accompanied the three uncles and aunts to go around Xiangjiang. Until early August, Pang Xuelin sent them back to Lancheng.

Pang Xuelin didn’t go back on his own. On the one hand, he had to go to the Deep City to talk with Ren Zhengfei about his shareholding in Warwick.

On the other hand, Pang Xuelin is planning to set up a semiconductor chip design company independently of Xinghuan Technology, and he will not be able to get away from him in a while.

Mu Qingqing also stayed. In her words, Pang Xuelin was busy every day, and her diet was irregular. She had to take advantage of this summer vacation to watch Pang Xuelin adjust her schedule as soon as possible.

Mu Qingqing’s remarks were supported by the three uncles and aunts, so Pang Xuelin had no choice but to let the girl stay.

On August 1, 1994, Pang Xuelin and Mu Qingqing passed the Luohu port and returned to the deep city.

Liu Qi was sent by Pang Xuelin to follow Huang Zaixing to buy ARM in the UK. By the way, he met the world and did not follow back.

“Yeah, it’s so hot, it’s finally home!”

Just arrived at the small building in Liu Qi ’s deep city, Mu Qingqing sat on the sofa, turned on the air conditioner, and gasped with his tongue out.

The summer in the south is hot and stuffy, and Mu Qingqing is obviously not used to it.

Pang Xuelin found the frozen Jianlibao from the refrigerator and opened it with a big mouthful.

Mu Qingqing said: “Huge brother, give me a can!”

Pang Xuelin said: “Can you drink cold now?”

Mu Qingqing’s face was faintly blushing, and I didn’t know if it was hot or something. Jiao said, “I can drink now.”

Pang Xuelin took out a jar of Jianlibao and handed it to the girl after opening. He also sat down on the mahogany sofa.

Mu Qingqing took Jianlibao a soft sip and said, “Huge brother, what do you want to eat at night? I’ll wait to buy food.”

Pang Xuelin said with a smile: “It’s only three o’clock now. It’s still early. The weather is too hot. I have no appetite. Let’s make cold skin or noodles at night.”

“Okay!”

Mu Qingqing looks in a good mood.

For the next half month, it was her and Pang Xuelin’s two-person world. For her, this was a wonderful thing.

Pang Xuelin did not think so much, picked up the remote control on the coffee table, turned on the TV and watched it.

A set of CCTV news is being broadcast on TV.

“At 23:55 last night, China’s private commercial aerospace enterprise, the Star Science and Technology Chenguang Launch Vehicle, was successfully launched at the China Jiuquan Satellite Launch Center. This was the first successful launch of our private commercial launch vehicle into orbit and achieved a double star.

This successful launch shows that our private aerospace enterprise has mastered the core technology of software and hardware such as the overall and system integration of the launch vehicle, solid and attitude control power, electrical integration, etc., and has the R & D and launch of the entire process and all elements of the launch vehicle system engineering Service capabilities.

Once upon a time, aerospace launches have always been the exclusive field of the national team in China. With the gradual opening up of national policies in recent years, a large number of private aerospace companies have grown rapidly. By the end of 1993, there were more than 100 private aerospace enterprises registered in China.

At present, the national team is mainly responsible for large-scale national aerospace projects, and a large number of civilian satellite launch requirements cannot be completely satisfied by the national team. In this case, private space companies can just make up for this gap. This type of private enterprise has a flexible operating system and a rapid market response. It can not only meet the individual needs of customers such as enterprises and scientific research institutions, but also enhance its financial strength through multiple channels.

After more than ten years of reform and opening up, the strength of China’s private capital has gradually grown. If it can attract private capital into the space field and continue to inject vitality and vitality, it will promote the further development of the space industry.

It is true that compared with the international advanced level, China’s private space industry has just started, and the road ahead will be long and winding. For example, the relevant laws and regulations are lagging behind, and there is still no clear legal guarantee for private enterprises to enter the aerospace field; the infrastructures such as launch sites and assembly plants are insufficient and not open to private enterprises; the national team and private aerospace enterprises lack information exchange platforms and the threshold The high confidentiality review has weakened the liquidity of private enterprise funds.

However, as long as we persist in reform and opening up and constantly clear obstacles in the system and mechanism, our private space industry will surely usher in a better tomorrow … “

The host on TV is talking about the development of private space projects.

Pang Xuelin’s eyes narrowed slightly.

I have been in this world for almost two years.

Pang Xuelin has a clearer understanding of this era.

In this world, China is not far behind the overall level of the world in the aerospace field, and it can be called the third largest aerospace country in the world after the United States and Russia.

In the field of aerospace launches, private capital was also opened early.

Therefore, there are no obstacles for Pang Xuelin to enter the aerospace market in the future.

This is why Pang Xuelin did not rush into the aerospace market. On the one hand, there is basically no profit to enter the aerospace market. On the other hand, the solar sail stellar spacecraft he wants to build in the future will expand except for the application of micro current. Except for the solar sails, other technologies are already quite mature, and Pang Xuelin has no need to do research in this area.

On the contrary, in the field of semiconductors and microelectronics, domestic development and previous life have not changed much.

Therefore, Pang Xuelin might as well start from here to strengthen the domestic industrial chain while also improving the level of electronic equipment in the future construction of the interstellar spacecraft.

Pang Xuelin was thinking about something, but only felt his shoulders sink. I don’t know when, Mu Qingqing was even half-closed, leaning on his shoulders and falling asleep.

“Qingqing, Qingqing!”

Pang Xuelin patted Mu Qingqing’s head lightly. Mu Qingqing just hummed twice and didn’t mean to wake up.

Pang Xuelin was a little helpless, and the girl’s unique fragrance when there was no human affairs kept coming between his noses, which made him feel a little like a horse.

Pang Xuelin didn’t feel bad about Mu Qingqing. Such a beautiful girl basically hung all her heart on herself. He was not a wooden man. How could he not feel it?

It’s just that he was destined to leave this world, and he was so entangled with Mu Qingqing that Pang Xuelin worried that it would hurt the other party.

After thinking for a while, Pang Xuelin supported Mu Qingqing’s head, turned around, hugged the other person’s waist, and walked into the bedroom where she had slept before.

Pang Xuelin put Mu Qingqing down on the bed, just preparing to leave, she felt that the girl’s arm was tightly wrapped around her neck, but she didn’t let it go for the first time.

“Qingqing!”

Pang Xuelin said.

Mu Qingqing opened his eyes, all eyes were filled with Pang Xuelin.

“Huge brother …”

Mu Qingqing put his arms up and raised his head, directly blocking Pang Xuelin’s mouth.

Before Pang Xuelin responded, Mu Qingqing suddenly released his arm and turned around. The whole person curled up, his eyes closed tightly, like a little quail.

Pang Xuelin was dumbfounded.

Is the girl of this age so reckless?

Was he just taken advantage of?

“Qingqing, you …”

Pang Xuelin couldn’t help crying and laughed and called Mu Qingqing twice. When she saw the girl pretending to be a dead fish, she shook her head and turned to leave the room.

Listening to the door being closed again, Mu Qingqing quietly opened his eyes and glanced at the probe, giggling.

When Mu Qingqing woke up and appeared in front of Pang Xuelin again, the girl returned to her usual appearance, as if nothing had happened.

…

Early the next morning, Pang Xuelin went to Warwick.

Ren Zhengfei has long led Zheng Baoyong, Li Yinan, Xu Wenwei and others waiting for a long time.

Five months ago, on the plane from Xiangjiang to Los Angeles, Pang Xuelin and Ren Zhengfei reached an agreement to inject capital into Warwick.

It’s just that Pang Xuelin has been staying in the United States for the past five months, and the two have never implemented the capital injection.

Therefore, this time while Pang Xuelin returned to the deep city, Pang Xuelin and Ren Zhengfei could just sign the equity transfer agreement.

The arrival of Pang Xuelin was warmly welcomed by everyone at Warwick.

Whether it was Zheng Baoyong, Xu Wenwei, or Sun Yafang, they did not have much opinion on Pang Xuelin’s capital injection into Warwick.

Although Warwick has developed well in the past year, the C & amp; C08 two thousand gate program-controlled switches and the ten thousand gate program-controlled switches are invincible in the domestic market, but they do not have a clear concept in which direction to follow.

Pang Xuelin, a technical tycoon, has become a mythical existence in the eyes of Warwick engineers.

For those employees who have just joined Warwick in the past year, the most heard is about how Pang Xuelin can get the miracle of C & amp; C08 program-controlled switches in a month.

In addition to the explosion of STAR CVD in the past year, Pang Xuelin has a new layer of young entrepreneurs, the halo of the richest billionaire in China, in addition to the title of technical big cow.

Therefore, the entire Warwick can be said to be looking forward to the arrival of Pang Xuelin.

After signing the relevant agreement, everyone came to the meeting room to discuss the future development direction of Warwick.

In the conference room, Pang Xuelin and Ren Zhengfei sat on the top of the conference table, all of them were core executives and key technicians of Warwick. Pang Xuelin basically knew each other.

Pang Xuelin looked at everyone and smiled, “I will not introduce myself, and everyone knows that I am a person. I am honored to join the family of Warwick. I hope that everyone will continue to work hard and contribute to the development of Warwick. For market operation. I do n’t know much. In the future, I will mainly be in charge of President Ren and President Sun (Sun Yafang). I am mainly responsible for R & D issues. “

“In fact, President Ren has been discussing with me during this time. Since I led you to complete the research and development of program-controlled switches last year, the entire Warwick R & D department has been slacking down, and everyone seems to be unable to find a new development direction. So today , I came here to talk about the main business direction of our Warwick company in the future. “

“The first R & D direction is 3G operator business!”

“The second research and development direction is consumer electronics and mobile phone business!”

The meeting room suddenly became quiet, and many people were talking about it.

“3G business? Mobile phone business? Can we do these two technologies?”

“Can’t even understand 2G in China? Do we go directly to 3G?”

“There are also mobile phones, I am afraid there is not even a supporting industrial chain in China …”

Everyone had a lot of discussion, but no one objected at the first time.

Pang Xuelin smiled, and later generations dominated Warwick in the 5G era. In this era, even 2G technology has not touched the threshold.

The so-called 1G, 2G, 3G, 4G, and 5G actually refer to the first-generation, second-generation, third-generation, fourth-generation, and fifth-generation communication technologies, respectively.

1G is the “big brother’s era”: analog cellular mobile communication, mainly two kinds of systems, 1 is the TACS used in Europe, one is the AMPS in the Americas, but the anti-interference performance is poor, and the simple use of FDMA technology makes the frequency The cost and system capacity are not high, and its disadvantage is that it is easy to serial number or stolen number.

2G is digital communication, which laid the foundation for the next 3G and 4G, such as the introduction of packet domains and the compatibility transformation of the air interface, so that mobile phones no longer only have a single service such as voice and SMS, but can also connect more efficiently. Access the Internet. But its disadvantages are low transmission rate, unstable network, and high maintenance cost.

But when it comes to 3G, the mainstream standards are mainly WCDMA, CDMA2000? EVDO, and TD-SCDMA. Later, Wimax of the IEEE organization was approved to join the IMT-2000 family, which became the 3G standard. Its CDMA system shows huge development potential due to its simple frequency planning, large system capacity, high frequency reuse factor, strong anti-multipath capability, good communication quality, soft capacity, and soft handover.

Compared with 2G, 3G mainly adopts CDMA technology, which expands the spectrum, increases the spectrum utilization rate, improves the rate, is more conducive to i-services, and the rate is further improved, and some functions have also been moved down from higher-level machines such as RNC to Completed in the base station, which improves the response speed and reduces the delay. At the same time, the 3GPP organization is constantly preparing for the future while evolving 3G technology, including soft switching in the circuit domain of the core network, IP of the packet domain, and the transmission network, etc.

The formulation of 4G standards is mainly by two organizations, one is the 3GPP organization, which represents the vast majority of traditional operators, communication equipment manufacturers, etc. LTE / LTE-Advanced comes from its own hands. One is the IEEE organization, which is mainly a challenge to the communication industry by the IT community, and the follow-up of Wimax was launched, which is WierlessMAN-Advanced. It is a technology product that integrates 3G and can transmit high-quality video images and image transmission quality comparable to high-definition TV. The 4G system can download at 100Mbps, which is 2000 times faster than dial-up Internet access, and the upload speed is also It can reach 20Mbps, and can meet the requirements of almost all users for wireless services. It can be comparable to 20M broadband, watch HD movies in seconds, and download speeds are fast, so the traffic will be consumed quickly. There is a saying that 4G, the house moves overnight, but Its coverage is limited, and data transmission is delayed.

5G, as a new generation of mobile communication technology, its network structure, network capabilities and requirements are very different from the past. A large number of technologies are integrated into it. The key technologies of 5g include: OFDM-optimized waveforms and multiple access Into, realize scalable OFDM interval parameter configuration, OFDM windowing to improve multiple transmission efficiency, flexible frame design, ultra-dense heterogeneous network, network self-organization, network slicing, content distribution network, device-to-device communication, edge computing , Software-defined networking and network virtualization.

5G uses OFDM-based waveforms and multiple access technology. UU Reading www.uukanshu.com because OFDM technology is widely used in today’s 4GLTE and Wi-Fi systems, because it can be extended to large bandwidth applications, it has high spectral efficiency And lower data complexity, can meet 5G requirements well. The OFDM technology family can implement a variety of enhancements, such as enhancing frequency localization through windowing or filtering, increasing multiplexing efficiency between different users and services, and creating single-carrier OFDM waveforms to achieve energy-efficient uplink transmission.

With a 15kHz interval between OFDM subcarriers (fixed OFDM parameter configuration), LTE can support a carrier bandwidth of up to 20MHz. In order to support more abundant spectrum types / bands (in order to connect as many devices as possible, 5G will use all available spectrum, such as millimeter microwaves, unlicensed frequency bands) and deployment methods. 5GNR will introduce scalable OFDM interval parameter configuration. This is crucial because when FFT (Fast Fourier Transform, Fast Fourier Transform) expands to a larger bandwidth, it must be ensured that the complexity of the processing is not increased. In order to support different channel widths of multiple deployment modes, 5GNR must adapt to different parameter configurations under the same deployment, and improve the efficiency of multiplex transmission under a unified framework. In addition, 5GNR can also implement carrier aggregation across parameters, such as aggregating millimeter wave and carriers below 6 GHz.

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