According to Duke's understanding of existing terrestrial communication technology, point-to-point data transmission ultra-long-distance wireless technology, in addition to satellite communication, is probably only possible with microwave communication.

But if he didn't return all the knowledge he learned in school to the teacher, it seems that the maximum practical transmission distance of the microwave equipment in the general point-to-point mode is less than 50 kilometers, and at this limit distance, there must be no obstruction, even so, in this limit state, the transmission data is actually not very stable.

However, microwaves also have disadvantages such as not being able to pass through and bypass large buildings. From Duke's house to Billem, the middle is not a plain area with no obstacles, although Duke's villa is on the outskirts of Rongcheng, and when the weather is good, you can faintly see the peaks on the other side of Xiling.

But there are also a lot of high-rise buildings in the middle, not to mention that the mountains are still in a primitive state, and the alien mothership of Billem is hidden under towering trees, which is obviously difficult to complete if you use microwave methods in this situation.

Duke couldn't help but be a little curious and expectant about Lem's long-range wireless access technology.

Billem's sense of time was still relatively strong, and soon, Duke received Billem's new communication equipment design plan.

"This is a design that I made on the spot, it may be a bit rudimentary, but it will be used for it," Billem said after passing on the design plan, "The technology and components used are based on the existing wireless communication equipment on your earth, you should be able to easily understand this thing, and easily find the components to implement this thing and assemble it." ”

Duke couldn't help but burst into tears when he heard Billem say this, Billem was finally able to provide something that he could use directly without breaking his own mind.

Open the scheme, with the communication technology foundation that Duke now has, this design really does not look particularly complicated, it is very a bit of a mixture of WIMAX and LTE two current mainstream wireless communication technologies, so this is an improvement scheme on the earth's existing wireless transmission technology, and there is nothing particularly surprising in terms of transmission speed, which can provide 100 megabits per second transmission capacity in a very narrow communication frequency band.

However, Bielem uses a genius and creative modem algorithm to perfectly filter out background noise under low-bandwidth signals, and then obtain excellent transmission distances According to Bielem's existing instructions, Bielem's wireless communication equipment can send signals to a distance of more than 100 kilometers at a few watts, which means that the long-distance transmission distance can be up to 100 kilometers.

This transmission distance is beyond the reach of WIMAX and LTE, two current mainstream wireless communication technologies.

Coupled with the higher efficiency of this technology for the use of communication channels, it can be said that it completely surpasses WIMAX and LTE in technology. Sure enough, it's a baby, Duke saw this, couldn't help but be ecstatic in his heart, with this thing, the future of the new Nokia Mobile in the 5-year agreement after getting rid of the 5-year agreement restrictions, will be able to use this technology to enter the wireless communication system equipment market, rewrite the world communication market standard.

However, Duke's joy did not last long, because he soon found that Billem's design was too simple, just providing a circuit design diagram and a moderation algorithm such as simple things, from the circuit design diagram, how Duke felt that after those familiar circuit designs, there was a sense of déjà vu.

A lot of things Duke had even seen elsewhere, so there was no doubt that the communication device was designed using something readily available on Earth, but it was the fact that there were so many circuits that Duke was familiar with that Duke had the idea that this thing was a patchwork piece.

In fact, this thing was improvised by Bilime using the terrestrial communication technology he had learned, but borrowed some of his own planet's realization ideas in terms of moderation and demodulation. During this long period of time, in addition to exchanging knowledge of the universe and starry sky with fans on the Internet, Bilem also learned some scientific and technological knowledge on the earth through the Internet, and now at least in terms of communication technology, it is no less than the level of a master's student majoring in formal communication.

However, the design given to Duke is really at the graduate level, and soon Duke will suffer from the clumsy design of Billem.

Duke took Billem's design and spent two days trying to understand it, although there were many places where Duke had reservations about Billem's design, but based on Billem's consistent trust and the incomparably huge aura of alien technology, Duke did not dare to question Billem's design, but broke it down and turned it into a circuit board design and component list.

The design of Billem looks more complicated than a mobile phone and computer, but the difference is not particularly big, Duke believes that if there is a suitable circuit board, he can realize this long-distance wireless transmission device, this thing is related to the big secret of Billem, Duke decided to do it himself, build it himself.

There is nothing to keep secret about the circuit board, and it is directly handed over to the SAL hardware research laboratory to realize it Now Rongcheng is almost the base camp of SAL R&D, and has built a variety of communication R&D laboratories that can be called first-class in the world, and it is not difficult to make this kind of circuit board designed by Billem

To be on the safe side, Duke asked the hardware research lab to provide ten circuit boards and ten sets of components, and he hadn't done it for a long time. Soon, Duke was glad at how wise his decision was.

The components that Duke needed were not many of them, and they were stocked in the warehouse of the SAL Hardware Lab. So the next day, Duke got what he needed, locked up a lab, and started doing his usual work.

Although Cai Siqiang is a little strange why Duke went to the laboratory at this time when he came back to deal with the mobile phone traffic problem, Duke often did this kind of inexplicable thing before, and most of them were in a hurry to study and verify after having some strange ideas.

And usually after that, Duke produces a new result.

Of course, the idea of genius is not something that ordinary people can guess. Besides, the traffic problem, in Cai Siqiang's opinion, is indeed not a big problem, as long as Duke does not propose to be leaked, it is nothing to spend a little more traffic fees.

In Cai Siqiang's opinion, the reason why Duke rushed back is probably because he was worried that something had been leaked, so he was just relieved to come back to check.