In the following week, Pang Xuelin accompanied the third uncle and three aunts for a walk around Xiangjiang, and it was not until early August that Pang Xuelin put them on the plane back to Lancheng.

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

On the other hand, Pang Xuelin is preparing to set up an independent semiconductor chip design company outside Transwarp, and he can't get away for a while.

Mu Qingqing also stayed, in her words, Pang Xuelin was busy every day, and her diet was irregular, so she had to take advantage of the summer vacation to keep an eye on her, so that Pang Xuelin could adjust her schedule as soon as possible.

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

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

Liu Qi was sent by Pang Xuelin to follow Huang Zaixing to the UK to acquire ARM, and by the way, he saw the world and did not come back.

"Ah, it's so hot, it's finally home!"

As soon as he arrived at Liu Qi's small building in Shencheng, Mu Qingqing sat on the sofa, turned on the air conditioner, and stuck out his tongue and panted.

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

Pang Xuelin took out the frozen Jianlibao from the refrigerator, opened it and poured a big mouthful.

Mu Qingqing said: "Brother Pang, bring me a jar too!" ”

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

Mu Qingqing's face was flushed with a faint flush, and she didn't know if it was hot or what, and said coquettishly: "I can drink it now." ”

Pang Xuelin took out a jar of Jianlibao at this time, 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, what do you want to eat at night?" I'll wait to buy groceries. ”

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 skin or cold noodles in the evening." ”

"Okay, okay!"

Mu Qingqing seemed to be in a good mood.

The next half month was a two-person world between her and Pang Xuelin, and for her, this was a wonderful thing.

Pang Xuelin didn't think about it so much, picked up the remote control on the coffee table, turned on the TV and watched.

The TV was playing the hourly news of a CCTV set.

"At 23:55 yesterday evening, China's private commercial aerospace enterprise, Xingchen Technology Chenguang launch vehicle, was successfully launched at the Jiuquan Satellite Launch Center in China. This is the first successful launch of China's private commercial carrier rocket into orbit, and it has achieved two satellites with one stone.

The successful launch shows that China's private aerospace enterprises have mastered the core technologies of software and hardware such as the overall and system integration of launch vehicles, solid and attitude and orbit control power, and electrical integration, and have the ability to develop and launch services for the whole process and elements of launch vehicle system engineering.

Once upon a time, space launch in China has always been the exclusive field of the national team, with the gradual opening of national policies in recent years, a large number of private aerospace enterprises have grown rapidly. By the end of 1993, there were more than 100 private aerospace enterprises registered in China's interior.

At present, the national team is mainly responsible for the national large-scale aerospace project, and a large number of civilian 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 kind of private enterprise has a flexible operating system and a rapid market response, which can not only meet the individual needs of enterprises, scientific research institutions and other customers, but also enhance its financial strength through multiple channels.

After more than 10 years of reform and opening up, China's private capital strength has gradually grown, if it can attract private capital to invest in the aerospace field, and continue to inject vitality and vitality, it will boost the further development of the aerospace industry.

It is true that compared with the international advanced level, China's private aerospace industry has just started, and the road ahead is tortuous and long. For example, the relevant laws and regulations are lagging behind, and there is still a lack of clear legal guarantee for private enterprises to enter the aerospace field; Insufficient infrastructure such as launch sites and assembly plants and insufficient access to private enterprises; The lack of information exchange platforms between the national team and private aerospace companies, as well as the excessively high threshold of confidentiality review, have weakened the liquidity of private enterprises.

However, as long as we persist in reform and opening up without stopping and constantly remove the obstacles in the system and mechanism, China's private aerospace industry will certainly usher in a better tomorrow......"

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

Pang Xuelin's eyes narrowed slightly.

It's been almost two years since I came into 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 aerospace field, and can be called the world's third largest space power after the United States and Russia.

In the field of space launches, private capital was also opened up as early as possible.

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, now entering the aerospace market, there is basically no profit at all, on the other hand, the solar sail interstellar spacecraft he wants to build in the future, except for the solar sail that will expand when applying microcurrent, other technologies are actually quite mature, and Pang Xuelin has no need to engage in this research.

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

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

Pang Xuelin was thinking about something, but he felt a sinking on his shoulders, and at some point, Mu Qingqing's starry eyes were half-closed, leaning on his shoulder and squinting 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 kept coming from his nose, which made him a little uneasy.

Pang Xuelin didn't have a good impression of Mu Qingqing, such a beautiful girl, basically hung her whole heart on herself, and he was not a wooden person, how could he not feel it.

It's just that he is destined to leave this world, and he is too deeply entangled with Mu Qingqing, and Pang Xuelin is worried that he will hurt the other party.

After thinking about it, Pang Xuelin held Mu Qingqing's head, turned around, picked up the other party, 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 that the girl's arm was tightly wrapped around his neck, and he didn't let go of it for the first time.

"Qingqing!"

Pang Xuelin said loudly.

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

"Big Brother ......"

Mu Qingqing's arm was forced, and his head went up, directly blocking Pang Xuelin's mouth.

Before Pang Xuelin could react, Mu Qingqing suddenly let go of his arm, turned around in an instant, and curled up with his eyes closed, like a little quail.

Pang Xuelin was dumbfounded.

Are girls in this era so reckless?

I was taken advantage of like this?

"Qingqing, you ......"

Pang Xuelin couldn't laugh or cry, called Mu Qingqing twice, and saw that the girl looked like she was pretending to be a dead fish, so she had to shake her head, turn around and leave the room.

Hearing that the door was closed again, Mu Qingqing quietly opened her eyes, looked at it twice, and laughed 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 had already led Zheng Baoyong, Li Yinan, Xu Wenwei and others to wait for a long time.

Five months ago, on a 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 in the United States for the past five months, and the two have never implemented the capital injection.

Therefore, this time, taking advantage of Pang Xuelin's return to Shencheng, Pang Xuelin and Ren Zhengfei could sign an equity transfer agreement.

Pang Xuelin's arrival was warmly welcomed by everyone in Warwick.

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

Although the development of Huawei in the past year is not bad, C&C08 2,000-door program-controlled switch and 10,000-door program-controlled switch 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 boss, has become a mythical existence in the minds of Warwick's engineers.

For those employees who have just joined Warwick in the past year, what they hear the most is the miracle of how Pang Xuelin got the C&C08 program-controlled switch in one month.

Coupled with the popularity of Transwarp CVD in the past year, Pang Xuelin has added a layer of young entrepreneur and the richest billionaire in China in addition to the title of technical bull.

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 conference room to discuss the next development direction of Warwick.

In the conference room, Pang Xuelin and Ren Zhengfei sat at the top of the conference table, and the bottom were all Warwick's core executives and key technical personnel, and Pang Xuelin basically knew each other.

Pang Xuelin looked at everyone and smiled: "I won't introduce myself, everyone knows who I am, I am honored to join the Warwick family, I hope you can make persistent efforts in the future and contribute to the development of Warwick." I don't know much about the market operation, and in the future, I will be mainly responsible for Mr. Ren and Mr. Sun (Sun Yafang), and I will be mainly responsible for R&D issues. ”

"In fact, Mr. Ren has been discussing with me during this time, since I led everyone to complete the research and development of program-controlled switches last year, the entire Huawei R&D 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&D direction is the 3G operator business!"

"The second R&D direction is consumer electronics and mobile phone business!"

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

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

"I haven't even been able to figure out 2G in China? Do we go directly to 3G? ”

"There are also mobile phones, I'm afraid there is no supporting industrial chain in China now......"

Everyone talked about it, but no one objected immediately.

Pang Xuelin smiled, Huawei that dominated the 5G era in later generations, in this era, even 2G technology has not yet touched the threshold.

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, mainly two standards, one is to follow the TACS used in Europe, the other is the AMPS of the Americas, but the anti-interference performance is poor, and the simple use of FDMA technology makes the frequency reuse degree and system capacity are not high, and its disadvantage is that it is easy to serial or steal numbers.

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

But when it comes to 3G, the mainstream standards are mainly WCDMA, CDMA2000? EVDO, TD-SCDMA, and later Wimax of the IEEE organization was also approved to join the IMT-2000 family, which also became the 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 switching.

Compared with 2G, 3G mainly adopts CDMA technology, which expands the spectrum, increases the spectrum utilization, improves the speed, is more conducive to i services, and the rate is further improved, and some functions are also moved down from the higher-level machines such as RNC to the base station to complete, 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-based in the packet domain and transport network, etc.

There are two main organizations in the formulation of 4G standards, 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 to the communications community from the IT community, and launched a follow-up to Wimax, which is Wierle ssMAN-Advanced. It is a set of 3G and WLAN in one and can transmit high-quality video images and image transmission quality and high-definition TV technology products, 4G system can be downloaded at a speed of 100Mbps, 2000 times faster than dial-up Internet, the speed of uploading can also reach 20Mbps, and can meet the requirements of almost all users for wireless services, comparable to 20M broadband, watch high-definition movies in seconds, download speed is fast, so the traffic will also be consumed very quickly, there is a saying with 4G, The house was moved overnight, but it had limited coverage and there were delays in data transmission.

As a new generation of mobile communication technology, its network structure, network capabilities and requirements are very different from the past, and a large number of technologies are integrated in it, the key technologies of 5G include: waveform and multiple access based on OFDM optimization, the realization of scalable OFDM interval parameter configuration, OFDM windowing to improve multi-channel transmission efficiency, flexible framework design, ultra-dense heterogeneous network, network self-organization, network slicing, content delivery network, device-to-device communication, edge computing, Software-defined networking and network virtualization.

5G uses OFDM-based waveform and multiple access technology, which is widely adopted by today's 4G LTE and Wi-Fi systems and is well suited to meet 5G requirements due to its scalability to high-bandwidth applications, high spectral efficiency, and low data complexity. The OFDM technology family enables a variety of enhancements, such as enhancing frequency localization through windowing or filtering, improving multiplexing efficiency between different users and services, and creating single-carrier OFDM waveforms for energy-efficient uplink transmission.

With a 15kHz spacing between OFDM subcarriers (fixed OFDM parameter configuration), LTE can support carrier bandwidths of up to 20 MHz. In order to support richer spectrum types/bands (in order to connect as many devices as possible, 5G will utilize all available spectrum, e.g., millimeter microwave, unlicensed bands) and deployment methods. 5G NR will introduce scalable OFDM interval parameter configurations. This is critical because when FFT (Fast Fourier Transform) scales up for larger bandwidths, it must be guaranteed that it does not add complexity to 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 multiplexing efficiency under a unified framework. In addition, 5G NR can also achieve carrier aggregation across parameters, such as aggregating millimeter waves and carriers in sub-6 GHz bands.