Blooming America

In 2 years, an American named Nathan Stabfield made the first wireless telephone device in a rural house in Murray, Kentucky. This wireless mobile communication phone is the first of human beings. Explore research.

In 1938, Bell Laboratories made the world's first mobile phone and cell phone for the US government.

In August 1968, Martin Cooper realized the world's first mobile phone for civilian use, using cdma technology and integrated circuits.Although it seems that such a mobile phone looks as huge as a small suitcase, but also because this is the original product. For this reason, it can be reduced within one or two years at most. If possible, maybe three years later, this mobile phone will be able to go on the market.

Because of the core of spread spectrum technology, cdma development is even smoother than g** and analog signals. To say that the most important thing to do with this technology is undoubtedly to bypass the blockade of the United States. In contrast, it is very simple to implement the technology. This is why the federal government lifted the ban. After that, the reason why cdma was immediately displayed.

The technical core of g** is the time division multiple access technology Tdma, that is, each wireless frequency is evenly distributed to eight or sixteen mobile phone users, and each user interactively occupies one-eighth of the channel time, because when people are talking, The interval between voices is actually very long. Only when voice coding is done reasonably, several users can share a channel.

However, cdma is more advanced. Through code division multiple access technology, it can make the call quality better and the data transmission volume larger. The most important thing is that it can be realized more easily because it has a foundation, and it does not need Research from scratch.

Heidi Lama, the mother of cdma, Qualcomm has become the tax collector of the future billion 3g users with the technology she left behind. It is precisely because of this technology that even if Qualcomm does nothing, the annual profit generated is also Can bring them into the world and persuade them to be strong.

As the number one beauty in Hollywood of the era, Heidi Lama is now in the research room.

As the creator of frequency hopping or spreading technology, Rama knows his own technology best. The US military's control of frequency hopping technology has made research into a dilemma for a time, but fortunately, Rama had an idea and came up with it. A way to skip the control is to create cdma technology. Technology itself is not restricted, so as long as the loopholes can be caught, they can be broken through. Besides, this patent itself is Heidi Ramah's own. In addition, the frequency hopping code division multiple access Fh-cdma is also an overkill when it is used in the private sector. It is enough to use a more general technology, and there is no need for high technology

Heidi's major is communication. Although she used to be an actor, her drug industry has not been pulled down, otherwise she would not be able to create frequency hopping technology.

,, Unfortunately, there is no way to miniaturize it yet. "

Cooper also returned from Luo Yufan at this time. He was still carrying the box in his hand at this time.

Don't underestimate this box. The various circuits are installed inside the box. These are the basis for the operation of this mobile phone.

Of course, it's just the basics.

,,We are just doing a verification test. If it is a normal call, it should be possible to reduce it to the size of a landline. "Heidi looked at the junior.

The time Cooper spends on his mobile phone is simply unimaginable. Every morning, Cooper must be the first person to come to the laboratory, and every afternoon, he must be the last to go back. Sometimes, he even lives in laboratory.

cdma's technology is much more advanced than the wireless communication technology Cooper studied for car phones. Even a genius like Cooper needs a certain amount of time to understand.

But what Heidi did not expect was that Cooper had mastered cdma technology so quickly. He forgot to sleep and eat every day just for this kind of mobile phone. It is entirely appropriate to use the word ",, fanaticism" to describe the current Cooper.

,,Cooper, I think you should take a break for a while, maybe a vacation or something. "Heidi kindly reminded the other party. Although, the death of overwork" was promoted by the Japanese, but if Cooper in front of him does not rest for a period of time, it is very likely that he will have a destiny with this word.

, No, we need a real mobile phone, a portable product to carry with us. What is Bell Labs? They are outdated! "

Cooper has not forgotten his previous experience of being discriminated against.

,,Mobile phone? Where is the phone? ! "

At this time, Catherine, who couldn't wait, also rushed over.

,,Miss Edson? , Cooper looked back.

,,Ah, Ms. Cooper Rama, your mobile phone has been successfully developed? ,

It was five years earlier than in history. Catherine thought that she would have made a lot of money two years earlier, but she did not expect it to be realized now.

,,This is it. "

Zhibo put down his handful suitcase.

,,The tool is just a trial product, which is very inconvenient.

"Heidi is obviously dissatisfied with this kind of mobile phone,,, we can still make it more perfect."

,,Yes, as long as three years, maybe two years, or even one year, we can create a mobile phone, a truly portable mobile phone! Think about it, in the future, everyone will carry the mobile phone products we created in their hands, oh my God, this is simply wonderful, isn't it? "

Cooper is obviously more active than Heidi.

,, I think I should give you a vacation first. "

Catherine saw Cooper's dark circles again. Then she turned around and looked at this mobile phone again."

,,Battery life is also a problem. It is difficult for the existing power supply to provide such a device. If a dry battery is used, although it is possible, stability is another problem."

Heidi's words calmed both Catherine and Cooper temporarily.

,, now the problem is still rectified) There are many, if it is really applied, look optimistic, maybe two years will be enough, and be pessimistic for about ten years, Miss Ka Edson, I think you'd better plan for the worst Come and prepare. ,

This lady with unique wisdom is very calm about things.

,, Oh, that's right. "Catherine knew that Heidi had always wanted to prove her talent. Even so, she was so calm at the moment.

,,Then, tell me more about your technology. "

Catherine mainly wanted to hear about the questions, by the way, to verify how far this is from the previous world.

, We have set up a base station in Los Angeles and San Francisco respectively. Other data has not been tested for the time being, we just verified the communication function. At least there is a difference between the base station and the place where I called by at least meters. Currently there are only these." Cooper told Catherine about some other conditions of the phone.

,, um, then, the next step we should test the base station, it is best to improve it. When you are miniaturizing mobile phones, we can just build mobile base stations across the United States, so that when the mobile phones are ready for use, we can immediately put them into production. "Catherine thought for a while, and then continued:,, As for the battery problem, I will find a way to solve it. If I can't figure it out, I don't know if the lead battery will work."

Catherine has long been very resentful of all kinds of batteries nowadays.

And she has already planned for a rainy day, and let Soros lead a venture fund to invest in various energy industries, isn't it just to need a suitable energy storage device?

It is not necessarily the future lithium battery, as long as it can achieve the same effect, it is enough for Catherine.

Now is the time to think about "is there", not the time to think, okay?

Of course, the current lead-acid batteries can also be replaced, but various problems that need to be solved are piled up and it is better to find a new device. Most of the lead-acid batteries are of the start-up type, that is, the type of instantaneous high-current discharge. If this type of equipment is used, it is troublesome if various problems are not solved, and the circuit board may be burned out if you are not careful.

In addition, operations are also key.

In this regard, the most famous example is the "Iridium Project", a plan that does not rely on mobile phone base stations, but uses satellites to implement calls.

Motorola invested billions of its own money, and then raised 5 billions of funds, spent a whole billion US dollars to send a satellite to the sky, to realize the ambition of "talking the world"~www.wuxiaspot.com~ But this ape star The company declared bankruptcy after a year of operation.

This is not the problem of the project itself. After 1 year a private equity company (VaTe-Ty bought it at a low price of 25 million US dollars, the entire company had a turnover of 300 million US dollars in just a few years. 50 million profit.

Good products are handed over to waste wood, which is also garbage.

Find a useless sen. Even if you hand over the most advanced technology to him, he may not be able to make money. Motorola is a typical example. Later, Motorola even sold the entire mobile phone business to Google, just like them. It was the same as selling the TV industry in the 1970s.

Although the mobile phone has not yet appeared, but the rainy silk margin is also a must. Historically, the premature operation of the Yixing plan was also one of the reasons for its failure. Because of the insufficient number of satellites, the bandwidth was very narrow, and this type of phone could hardly do anything except make calls.

Catherine was full of fighting spirit at this time. With lessons learned, she would not make those low-level mistakes. It was also necessary to lay the foundation in advance.

But the development of things, as Heidi said, should be considered from the worst point of view.