Xu Ke shook his head and waved his hands, "Classmate Jiang, I may not have explained it clearly enough. Let me put it more bluntly. What I mean is that I spent fifty yuan to make a walkie-talkie, and to realize my dream it may cost five thousand or even fifty thousand yuan. In short, it is not a small amount." To be precise, it is not a figure that an individual can afford.
Jiang Shiyue nodded, "I know. Just go ahead and do your research. I'll figure out the money."
Xu Ke looked at Jiang Shiyue with an indifferent expression, opened his mouth, didn't know what to say, and then closed it again.
I wondered if Jiang Shiyue didn’t know what ten thousand yuan meant.
These days, if you have 10,000 yuan, you’ll be reported in the newspaper.
Moreover, 50,000 was just an analogy, and it may not be enough to actually achieve 500,000.
"I'll discuss the details of the cooperation with you tomorrow when I get back to school." Jiang Shiyue gestured to the food that had just been served on the table, "Eat first."
Xu Ke was in no mood to eat and said anxiously, "Student Jiang, you may think this is too simple! What I want to do compared to this walkie-talkie is like an adult compared to a baby. It's not difficult at all.
How should I put it? What I want to do is very similar to the principle of a walkie-talkie. But…"
Xu Ke had a bitter face and had no idea how to describe it to Jiang Shiyue. He also didn't know why Jiang Shiyue was so confident that he could make a tool for real-time long-distance calls.
She is even more persistent than herself.
Seeing Xu Ke was so anxious that he couldn't speak clearly, Jiang Shiyue stretched out her hand and made a downward gesture in the air, "Xu Ke, don't be anxious. I know what the difficulty you are talking about is."
Xu Ke was stunned.
"You're right. Walkie-talkies and cell phones... I mean tools for real-time, long-distance communication. Let's call them cell phones for now, meaning walkie-talkies in your hand. The biggest difference between the two lies in the communication method. Walkie-talkies don't require high encryption, and they transmit over short distances."
The walkie-talkie you made uses the college's broadcast channel and can only be used within a one-kilometer radius of the college. If someone else happens to have a walkie-talkie on this channel, they can hear it and communicate with us in real time.
"Mobile phones need to be able to communicate over very long distances, which requires numerous base stations, just like regular wired phones. Simply replacing the wired base stations with wireless ones is like establishing a single radio channel across the country. Furthermore, calls must be one-to-one between phones, not one-to-many like walkie-talkies."
Xu Ke nodded repeatedly. "Yes, that's what you said. The general principle is that our words are converted into encrypted radio signals through... um, mobile phones, and then converted into sound at the terminal. It's not difficult to say, but if we want to set up a site..."
Xu Ke spread his hands and smiled bitterly, "This has to be a national-level project. We definitely can't do it."
We are all students, how can we have the capital to build national projects?!
Jiang Shiyue nodded. "I know this isn't easy. Let's take it slow. We can first convert speech into encrypted radio waves and then back into sound at close range, or convert text into radio waves and then back into text."
"Oh, that's right! Why didn't I think of it?!" Xu Ke immediately became interested and felt that this function could be achieved.
Jiang Shiyue smiled.
Although she couldn't make a mobile phone, she understood the general principles. She also knew that the signal transmission mode has been changing from mobile phones to cell phones. The earliest mobile phones used analog signals, and later digital signals were used, such as in everyday mobile phones.
Mobile phones were not available until the early 1990s, so it's easy to imagine how difficult it would be to bring mobile phones to market ten years earlier. She was mentally prepared.
Xu Ke developed an appetite and began to eat voraciously.
He hadn't eaten for two days and was really hungry when he smelled the delicious food.
"Although I don't know how to make mobile phones, I have an idea. Do you think it's feasible? As you said, it's unrealistic for us to build base stations across the country with our capabilities. There are two solutions. One is to cooperate with the government and use its telecommunications. The other is to rent the right to use satellites and use them as radio base stations to enable real-time long-distance communication around the world."
Xu Ke choked and his face turned red.
Li Xiao was quick enough to pour a cup of tea and hand it to Xu Ke.
Xu Ke took a deep breath and finally recovered. His eyes were red as he accused Jiang Shiyue, "Classmate Jiang, I finally understand why no one believed I could make a mobile phone, but you firmly believed that I could. Because you dared to think more than I did."
Rent a satellite?
He didn't even dare to think about it.
Jiang Shiyue smiled but said nothing.
At present, the country's communications are still far behind the world level, and I am afraid that the functions of mobile phones will not be realized in a short time, but artificial satellites are already available.
Our country is the fifth country in the world to independently develop and launch a satellite. The first artificial satellite was successfully launched in 1970, but it was lost in less than a month.
And in 1978 we already had ground satellite communication base stations.
Of course, both radio base stations and renting satellites cost money.
Jiang Shiyue can only be considered a millionaire at the moment, and is still far from being a rich person.
"Speaking of which, Jiang," Xu Ke burped and asked, "Why do you know so much about radio? And why did you tell others that you were a light engineering major?"
Jiang Shiyue shook her head. "How could I know anything about radio? The expert I met in the countryside liked to say that I only heard it from one ear. As for light engineering, it's compared to heavy industrial engineering."
Normal light engineering generally refers to related majors such as packaging technology, cosmetics, and flavors.
The light engineering that Jiang Shiyue always talks about is related to computers, and the design-oriented engineering will belong to high-tech engineering in the future.
But these days, the most popular majors in their school are mechanical and electrical related majors.
This is because our country is currently far behind the world level in heavy industry, and workers often fail to complete production even though they work day and night.
Factory equipment is often outdated.
Therefore, what students in their school learn the most is the design of various production equipment used in maintenance workshops.
Xu Ke's major is not unpopular but it is not popular either. Jiang Shiyue's major is very unpopular, so she always says that she is majoring in radio.
The major she studied does not yet have a separate department.
Just like computer science, it is still classified as a mathematics department in many colleges and universities.
Li Xiao interjected enviously, "You college students are all so amazing!"
She didn't understand what Jiang Shiyue was saying to Xu Ke at all.
"You can also work hard to go to college!" Jiang Shiyue said to Li Xiao, "Instead of envying others, it is better to improve yourself."
"Me?" Li Xiao pointed his index finger at himself and shook his head. "I only graduated from elementary school! I'm an adult now, so I can't go back to junior high school, right?"
"It's never too late to start learning. If you can't go to school, study on your own or go to night school. You'll know if you can do it only if you try first." Jiang Shiyue encouraged Li Xiao.
Before Li Xiao could say anything, Xu Ke interrupted, "You're right. We have to try it first to know if it's possible! Then let's make a phone together!"
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