Chapter seven hundred and eighty-fourth to be the world's first
cdma uses three operating modes: low frequency band, that is, 3.1 to 5.15ghz, high frequency band 5.825 to 10.6ghz, and dual band 3.1 to 5.15ghz and 5.825 to 10.60hz.
The low-frequency band mode provides a transmission rate of 28.5 to 400 mbits per second, and the high-frequency band mode provides a transmission rate of 57 to 800 mbits per second.
Data is transmitted in extremely short time pulses in each frequency band exceeding 1ghz, using twenty-four chips of direct sequence spreading to achieve coding gain, and error correction methods using r-s codes and convolutional codes...!"
Liu Lang said calmly while drinking a drink. Ren Weitian didn't eat at the moment. He had already taken out a work notebook from his pocket and kept writing.
What Liu Lang told him was some of the core of cdma technology, but how did he know?
Again, during the year and a half in the United States, Liu Lang has never been idle for a moment. In addition to his professional courses, he also attaches great importance to American communication technology. He usually reads relevant core journals when he has nothing to do.
Nowadays, the technical level of the United States is very clear, and the most advanced cdma technology is of course within the scope of his key "care".
Stanford University also majors in semiconductors and radios. He sometimes goes to attend lectures, but not often. But with his IQ, his academic ability in related majors is no less than that of ordinary undergraduates.
Of course, Liu Lang can only be regarded as just getting started. He knows many technical parameters, but it is unknown how these parameters came about. It is not as miraculous as in the professional field of mechanical engineering. This is the importance of basics. Even if it is strong
Like Liu Lang's wisdom, without a large amount of basic knowledge reserves, he is still just an ordinary student.
But Liu Lang doesn't need to cover everything, because there are many experts in this field in China, and their abilities are actually no less than those of foreign scientists and engineers, such as Huang Kun, Zhou Ming and Xie Xide in the chip field. If
Going back thirty years, their level is not much worse than Gordon Moore. Even in this era when the chip industry has just emerged, the level of these people is world-class.
In the previous life, China's chip industry fell behind because it failed to keep up with the rapidly developing chip technology in foreign countries during the ten-year period from the mid-to-late 1980s to the late 1990s. In this life, because of the emergence of Liu Lang, this period has been
Even if it is smoothed out, China's chip technology in the future may not be as good as that of the United States, but the difference will definitely not be too big.
The same is true for the communications industry. It should be said that the country has a very good foundation, as evidenced by the large number of semiconductor factories and radio factories. However, like the chip industry, communications technology has not kept up with the trends of the times, especially in wireless communications.
The world is backward.
It’s not that China doesn’t have its own communications companies, such as China Mobile later, which was also a Fortune 500 company, but what’s the use?
"Old Ren, I won't stop you if you want to do the switch business, but there is a saying in the communications industry that first-rate sellers sell standards, second-rate sellers sell products, and third-rate sellers sell services.
The so-called standard is the highest peak of the industry, and it is the ticket. If you cannot meet this standard, no country will choose you, and you will not be able to eat the best meat.
If you can't eat meat, you can only eat soup and sell products, such as manufacturing switches that meet people's regulations. Although the switch is quite big, in the entire communication process, its profit is less than one-fifth of that of technology.
As for the final sale of services, that is what you are doing now. You did not make the switch, and the technology was not invented. You just need to buy the machine and install it and you are done. This part is important in the entire communication project process.
There is not even 1% profit. To put it bluntly, you are just like an operator... Lao Ren, I think you are a person who has achieved great things, and you should not be limited to selling services at the most basic level.
If you want to do business, you must comply with the highest standards, wouldn’t you say?”
Liu Lang felt that Ren Weitian had great momentum in his heart, which was the fearless courage to move forward or die if he didn't make progress, the aura of forge ahead, and the courage to climb to the top. This was evident from the fact that he was able to leave the "iron rice bowl" and go to sea in his forties.
You can see it when doing business. Later,
The development of Lai Huaqiang Company can also be seen. Even twenty years later, when he became an old man who was over seventy years old, he still fought against young people and filled Huaqiang Company with vitality. It was just these qualities that made him himself
Just don't know yet.
When it comes to "playing with" people's hearts, there is no one better than Liu Lang in the world. Especially when facing these people who will be all-powerful in the future, Liu Lang's words are like a key that can instantly turn the flames in the other person's heart.
ignite.
The same is true for Ren Weitian. His current wish is to set up a company to serve the telephone business, and after it slowly develops, he will make his own switches. That's all.
Now Liu Lang's words opened a door for him, and he found that on the other side of the door, there was an extremely vast world, but this world was still unfamiliar to him, and even he had nothing, but there was no doubt that
There are so many priceless treasures in this world waiting for him to discover them. Any treasure is much more valuable than a switch. His previous thoughts were too naive in front of these treasures.
Of course, he was still doubtful about what Liu Lang said and needed to verify it himself, but there was no doubt that Liu Lang's words still had a huge effect on him.
But Liu Lang was not done yet.
"Old Ren, the future development of the world is completely beyond our imagination. We don't know what the world will be like in five years. As for ten years from now, then and now will be two different worlds.
Therefore, today's entrepreneurs are full of hope and are also facing dangers. The key is whether you can see the development trend of this era. As long as you adapt to this trend, your business will prosper forever, but
If you cannot see the trend clearly, there is no doubt that it will be difficult for your business to survive.
We in China are now prosperous. You can make some money in whatever you do. If you just want to make some money, your switching business is no problem. You can become a millionaire within five years. After five years, you can make a millionaire.
It's hard to say. After all, the technical content is low and there are more people who can cross this threshold. Then your competitors will appear in large numbers.
I don’t think you, Lao Ren, are such a short-sighted person. If you want to do it, you have to be number one in the country. No, number one in the country is not enough. You have to be number one in the world!”
"No. 1 in the world? This... I'm afraid it's too difficult!"
Ren Weitian was infected by Liu Lang's words and felt that he was simply his spiritual mentor. Every word he said was a perfect match. This feeling was really wonderful, just like a depressed scholar who suddenly met an immortal, and then
After you tell him the secret,
Being able to become the number one pick undoubtedly made Ren Weitian's self-confidence explode. But Liu Lang asked him to become the world's number one company. This requirement is still too high. What kind of cdma did Qualcomm Company invent? He Huaqiang has
What? One is poor and the other is useless! How to compare the two?