The Science Fiction World of Xueba

In the next week, Pang Xuelin accompanied his third uncle and aunt for a stroll around the Xiangjiang River. It was not until the beginning of August that Pang Xuelin sent them on the plane back to Lancheng.

Pang Xuelin didn't go back by himself. On the one hand, he had to go to Shencheng to talk to Ren Zhengfei about investing in Huawei.

On the other hand, Pang Xuelin plans to independently establish a semiconductor chip design company outside of Transwarp Technology, and he will not be able to get away from it for a while.

Mu Qingqing also stayed. In her words, Pang Xuelin was busy every day, eating and drinking irregularly, so she had to take advantage of the summer vacation to watch over here, so that Pang Xuelin could adjust his work and rest time as soon as possible.

Mu Qingqing's words were supported by her third uncle and three aunts, so Pang Xuelin had no choice but to let the girl stay.

On August 1, 1994, Pang Xuelin and Mu Qingqing passed through Luohu Port and returned to Shencheng.

Liu Qi was sent by Pang Xuelin to follow Huang Zaixing to the UK to acquire ARM, and to see the world by the way, but did not follow him back.

"Oh, it's so hot, I'm finally home!"

As soon as she arrived at Liu Qi's small building in Shencheng, Mu Qingqing sat down on the sofa, turned on the air conditioner, and panted for air with her tongue out.

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

Pang Xuelin found the frozen Jianlibao from the refrigerator, opened it and took a big gulp.

Mu Qingqing said: "Brother Pang Da, bring me a can too!"

Pang Xuelin said: "Can you drink cold water now?"

There was a faint blush on Mu Qingqing's face, she didn't know if it was hot or what, she said softly, "I can drink now."

Only then did Pang Xuelin take out a can of Jianlibao, opened it and handed it to the girl, and he himself sat down on the mahogany sofa.

Mu Qingqing took a sip of Jianlibao and said, "Brother Pang Pang, what do you want to eat tonight? I'll go shopping later."

Pang Xuelin said with a smile: "It's only three o'clock, it's still early, the weather is too hot, I don't have much appetite, let's make some cold noodle or cold noodle at night."

"Okay, okay!"

Mu Qingqing seemed to be in a good mood.

For the next half month,

It's all her and Pang Xuelin's two-person world. For her, this is the most wonderful thing.

Pang Xuelin didn't think too much, picked up the remote control on the coffee table, turned on the TV and started watching.

The whole point news of CCTV is playing on the TV.

"Last night at 23:55, my country's private commercial aerospace enterprise, the Xingchen Science and Technology Chenguang carrier rocket, was successfully launched at the Jiuquan Satellite Launch Center in China. This is the first time that my country's private commercial carrier rocket has been successfully launched into orbit, and it has achieved double satellites with one arrow.

This successful launch shows that my country's private aerospace enterprises have mastered the core technologies of launch vehicle overall and system integration, solid and attitude control power, electrical integration, etc. Service capabilities.

Once upon a time, space launch has always been the exclusive domain of the national team in my country. With the gradual liberalization 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 mainland my country.

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

After more than ten years of reform and opening up, the power of private capital in my country has gradually grown. If private capital can be attracted to invest in the aerospace field and continuously inject vitality and vitality, it will boost the further development of the aerospace industry.

Indeed, compared with the international advanced level, my country's private aerospace industry has just started, and the road ahead will be tortuous and long. For example, the relevant laws and regulations are relatively lagging behind, and there is still a lack of clear legal guarantee for private enterprises to enter the aerospace field; the infrastructure such as launch sites and assembly plants is insufficient and not open enough to private enterprises; the national team lacks an information exchange platform with private aerospace enterprises, and the threshold is too high. High confidentiality review has weakened the liquidity of private enterprises' funds.

However, as long as we persist in reform and opening up and continue to remove obstacles in the system and mechanism, my country's private aerospace industry will surely usher in a better tomorrow..."

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

Pang Xuelin's eyes narrowed slightly.

It has been almost two years since I came to this world.

Pang Xuelin has a clearer understanding of this era.

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

In the field of space launch, private capital was also opened up early.

Therefore, there is no obstacle for Pang Xuelin to enter the aerospace market in the future.

This is also the reason why Pang Xuelin is not in a hurry to enter the aerospace market. On the one hand, there is basically no profit to speak of when entering the aerospace market. Except for the solar sail, other technologies are actually quite mature, and there is no need for Pang Xuelin to conduct research in this area.

On the contrary, in the field of semiconductors and microelectronics, domestic development has not changed much from previous lives.

Therefore, Pang Xuelin might as well start from here to strengthen the domestic industrial chain and at the same time improve the level of electronic equipment when building interstellar spacecraft in the future.

Just as Pang Xuelin was thinking about something, he felt a heavy weight on his shoulders. At some point, Mu Qingqing half-closed her starry eyes, leaned on his shoulder and fell asleep squinting.

"Qingqing, Qingqing!"

Pang Xuelin patted Mu Qingqing's head lightly, but Mu Qingqing just hummed twice and didn't intend to wake up.

Pang Xuelin was a little helpless, the unique fragrance of a girl who was not a human being continuously wafted from his nose, which made him a little distracted.

It's not that Pang Xuelin doesn't like Mu Qingqing. Such a beautiful girl basically puts her whole heart on herself. He is not a wooden man, so how could he not feel it.

It's just that he was destined to leave this world, and because he was too entangled with Mu Qingqing, Pang Xuelin was worried that he would hurt him.

After thinking about it, Pang Xuelin supported Mu Qingqing's head, turned around, picked him up by the waist, and walked into the bedroom where she slept before.

Pang Xuelin put Mu Qingqing down on the bed, and just as he was about to leave, he felt the girl's arms tightly around his neck, and he didn't let go immediately.

"Qingqing!"

Pang Xuelin said.

Mu Qingqing opened her bright eyes, and her eyes were full of Pang Xuelin's figure.

"Brother Pang..."

As soon as Mu Qingqing exerted her arms, her head went up, directly blocking Pang Xuelin's mouth.

Before Pang Xuelin could react, Mu Qingqing suddenly let go of her arms, turned around instantly, and curled up with her eyes closed, like a little quail.

Pang Xuelin was dumbfounded.

Are the girls of this era also so reckless?

Is he being taken advantage of like this?

"Qingqing, you..."

Pang Xuelin didn't know whether to laugh or cry, he called Mu Qingqing twice, seeing the girl pretending to be dead, he shook his head, turned and left the room.

Hearing that the door was closed again, Mu Qingqing quietly opened her eyes, looked around, and giggled coquettishly.

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

...

Early the next morning, Pang Xuelin went to Warwick.

Ren Zhengfei led Zheng Baoyong, Li Yinan, Xu Wenwei and others to wait 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, taking advantage of Pang Xuelin's return to Shencheng this time, Pang Xuelin and Ren Zhengfei could just sign the equity transfer agreement.

The arrival of Pang Xuelin was warmly welcomed by everyone in Huawei.

Whether it is Zheng Baoyong, Xu Wenwei, Sun Yafang, etc., they don't have much opinion on Pang Xuelin's investment in Warwick.

Although Huawei has developed well in the past year, C\u0026C08 2,000-gate program-controlled switches and 10,000-gate program-controlled switches are invincible in the domestic market, but they do not have a clear concept of which direction to develop next.

And Pang Xuelin, a technical tycoon, has become a mythical existence in the eyes of Huawei's engineers.

For those employees who just joined Huawei in the last year, what they heard the most was the miracle of how Pang Xuelin managed the C\u0026C08 program-controlled switchboard in one month.

Coupled with the popularity of Xinghuan CVD in the past year, in addition to the title of technology giant, Pang Xuelin has an additional halo of a young entrepreneur and the richest billionaire in China.

Therefore, the entire Warwick is looking forward to Pang Xuelin's arrival.

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 were sitting at the top of the conference table, on the left and right, and all Huawei's core executives and key technical personnel were at the bottom. Pang Xuelin basically knew each other.

Pang Xuelin looked at the crowd and said with a smile: "I won't introduce myself. Everyone knows who I am. I am honored to join the big family of Huawei. I hope that everyone will continue to work hard and contribute to the development of Huawei. For market operation I don’t know much about it, and in the future, Mr. Ren and Mr. Sun (Sun Yafang) will be in charge, and I will be mainly responsible for R\u0026D issues.”

"In fact, Mr. Ren has been discussing with me during this time. Since I led everyone to complete the research and development of the program-controlled switch last year, the entire Huawei R\u0026D department has been a little slack, 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 Huawei company in the future."

"The first R\u0026D direction is 3G operator business!"

"The second R\u0026D direction is consumer electronics and mobile phone business!"

The meeting room suddenly fell silent, and many people were talking about it.

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

"Doesn't the country even understand 2G? Should we go directly to 3G?"

"There are also mobile phones. I am afraid that there is no supporting industry chain in China now..."

Everyone was talking about it, but no one objected immediately.

Pang Xuelin smiled, Huawei, who will dominate the 5G era in later generations, has not even touched the threshold of 2G technology in this era.

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

1G is the "Era of Big Brother": analog cellular mobile communication, there are mainly two standards, one is TACS used in Europe, and the other is AMPS in America, but the anti-interference performance is poor, and the simple use of FDMA technology makes the frequency complex The cost and system capacity are not high, and its disadvantage is that it is easy to serialize or steal numbers.

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

But when it comes to 3G, the mainstream systems are mainly WCDMA, CDMA2000? EVDO, and TD-SCDMA. Later, Wimax organized by IEEE was also allowed to join the IMT-2000 family and became a 3G standard. Its CDMA system shows great development potential due to its simple frequency planning, large system capacity, high frequency reuse coefficient, strong anti-multipath ability, good communication quality, soft capacity, and soft handover.

Compared with 2G, 3G mainly adopts CDMA technology, which expands the spectrum, increases the utilization rate of the spectrum, and improves the rate, which is more conducive to i services, and the rate is further improved. It is 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 softswitching in the circuit domain of the core network, IP in the packet domain and transmission network, and so on.

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

5G is a new generation of mobile communication technology. Its network structure, network capabilities and requirements are very different from those in the past. A large number of technologies are integrated in it. The key technologies of 5G include: OFDM-based optimized waveform and multiple access Input, realize scalable OFDM interval parameter configuration, OFDM windowing to improve multiplex transmission efficiency, flexible framework 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 adopts OFDM-based waveform and multiple access technology, because OFDM technology is widely used in today's 4G LTE and Wi-Fi systems, because it can be extended to large bandwidth applications, it has high spectral efficiency and low data complexity performance, which can well meet the requirements of 5G. The OFDM technology family enables enhancements such as enhanced frequency localization through windowing or filtering, improved multiplexing efficiency between different users and services, and creation of single-carrier OFDM waveforms for energy-efficient uplink transmission.

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

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