"Beyond the existing theoretical system."

It means that you can't even think of something! Naoto Matsuzaki rubbed his forehead.

That's not a good thing!

If it is some kind of design advancement, then the empire can quickly catch up.

But if it's based on transcendence.

It's like the Mortars that the Empire has captured from the Dirt Trail.

The Imperial Military Industry had no idea of copying at all.

Not to mention anything else, I searched all over the country, and even the navy could not find qualified gun barrel steel.

This gap in material and foundation makes people hopeless.

"What's next?"

Naoto Matsuzaki took a deep breath and continued to ask.

Now it seems that it is no longer possible to locate the navigation signal of the Eighth Route Army, find the navigation beacon of the Eighth Route Army, and by the way, uproot the Eighth Route of the Eighth Route that is lurking in Beiping.

Only by other means.

But Naoto Matsuzaki also has to admit that the Tsuchihachi underground organization is very strong.

After a few months of fighting, even in the North China Review, the base camp of the North China Front Army, he has not taken advantage of it so far, and only knows that the Eighth Route Army provides navigation for transport planes through something called a navigation beacon.

But how exactly the beacon is, where it is, has never been seen.

"Being able to change the frequency at such a high frequency must be preset in advance, but the signal appearance time is too short, and the fluctuations are too large to track and position."

"Beacons really can't be located."

"It's hard to even locate the direction with a high probability."

"Unless I can find a physical object for me to study and determine their specific channel change rules."

The Devil Technical Leader took a deep breath and continued:

"Still, we still have a chance."

"Voice calls and navigation information are different."

"If you want to achieve a stable voice call, even if you keep changing the frequency, the signal must be stable, not continuous power on/off, and not fluctuating too much, otherwise you will not be able to transmit clear voice information at all."

"Yo Xi!"

Naoto Matsuzaki suddenly called Yo Xi.

"Still."

The devil technical leader said in a solemn tone:

"The technology of the enemy's equipment is more advanced than I can imagine."

"The frequency hopping speed of the navigation signal is much faster than I expected, and it is expected that voice calls may also have similar technology, which can achieve a frequency hop in about five seconds."

"I need more equipment."

"I need more high-power radios."

The devil technical leader looked at Naoto Matsuzaki.

"Hey, I'll get in touch with Chief of Staff Watanabe right away."

Naoto Matsuzaki nodded.

"Have you figured out their frequency hopping speed?"

After Matsuzaki left, the technical leader of the devil asked the technician on the side.

"About every four and three seconds."

A devil technician replied.

"Once in four and three seconds!"

The devil technical leader wiped his forehead.

Imperial Radio actually has a frequency hopping function, but even if the channels and frequency hopping rules are pre-set, the number of channels does not exceed ten, and it is operated by the most elite operators.

It can only beat once between fifteen and twenty seconds.

And the enemy, with nearly a hundred channels, can still do it in less than five seconds.

The gap is too big.

But.

"Less than five seconds?"

The eyes of the devil technical leader are hot, as if he has returned to the time when he was young and carried out technical research all night.

Less than five seconds is incredible.

Unbelievable.

There are nearly 100 preset channels, which is just as incredible.

But the warriors of the Imperial Locust Army are not afraid of difficulties and have the courage to challenge.

···

"The so-called frequency hopping."

"It refers to a method of frequency shift keying with pseudo-random code sequences to expand the spectrum by constantly changing the carrier frequency."

Yang Village.

Rarely, the boss, the division commander, the chief of staff, the brigade commander, the staff officer of the brigade headquarters and the division headquarters, etc., almost all gathered together to listen to the lecture of an electronic expert.

Experts from the system.

And behind the brigade commander, there are Li Yunlong and Zhao Gang.

The expert's voice fell, and everyone was dumbfounded.

Every word is understood.

But when added together, you don't understand.

"It seems that I will have to study more in the future."

The division commander sighed with emotion.

"Yes, at all times, cultural education is indispensable."

"Not only ordinary soldiers, commanders and fighters, but also we, the so-called intellectuals, cannot be left behind."

The boss said.

"Technology is changing with each passing day, and there is no end to learning!"

The Deputy General Staff was equally impressed.

As a matter of fact, most of them know a little about telecommunications technology, and the General Headquarters organized a radio training course last year, and they have all gone to listen to the training of some good seedlings from all over the army to train them in radio technology.

At that time, it took them a week to roughly learn the principles of the radio station and how to use it.

But now...

What experts teach is something they don't understand.

The information book in their hands was actually sent out last night, but they couldn't read it either.

"Any communication, sending and receiving must be in the same channel in order for the communication to be complete."

"Simple explanation."

"Frequency hopping is changing the communication channel."

The expert continues:

"The main method of communication interference is to interfere with a certain channel or a certain range of spectrum."

"Frequency hopping is the best way to solve and prevent interference."

"As long as the frequency hopping speed is fast enough and the preset frequency spectrum of frequency hopping is fast enough, theoretically, most communication interference and monitoring can be avoided."

"Because of technical limitations, the first generation of communication equipment was preset with 500 channels, which can achieve rapid manual frequency hopping, but there are difficulties in frequency matching, which affects the efficiency and quality of communication."

"It's not that hard to locate and interfere."

"It's the same with the original navigation beacons."

"Compared with walkie-talkies, because there is no need for continuous communication, it can be completely random in the case of preset 100 channels, and the frequency hops every 4.5 seconds."

"Moreover, it maintains continuous power on/off, and short-term high-frequency signal peak transmission to achieve interference, monitoring and positioning."

"Therefore, we have greatly upgraded the second-generation communication equipment."

"Through integrated circuits, microchips enable fast and automatic random frequency hopping."

"However, due to the limited performance of circuits and microchips, the current frequency hopping signal hopping speed is not high, so it can only be done..."

Hear here.

The chief of staff of the brigade headquarters subconsciously opened the information book in his hand.

He is the person who knows the most about communication among all the participants, and when he studied in a foreign university, he studied radio communication, and his tutor was also a top expert in foreign communications.

Frequency hopping!

There have been relevant theories abroad for a long time.

It is indeed the most effective way to interfere with signals and monitor.

A very simple analogy is that when the enemy is in ambush, change the route of the march, as long as there are enough roads and as long as the transfer is fast, it is impossible to be ambushed by the enemy.

But automatic frequency hopping, this is something that I didn't even think of.

Who controls the automatic frequency hopping?

How do I rebind?

You know, unlike the march, the purpose of the channel is to carry communication information, so the sender and receiver must be in the same channel.

And every time you hop, you have to reconnect.

During the period, how to ensure the uninterrupted communication?

The navigation signal can also be understood, after all, there can be a delay in navigation, but the delay in calling, on the battlefield, is very deadly.

But!

"Fifty times per second."

When the chief of staff of the brigade headquarters looked at the information book in his hand and flipped to the frequency hopping signal jump, the expert's voice also fell synchronously:

"This speed is not safe, and even the first generation of radio jamming and listening devices can be brute-force and jamming."

Hearing this, the chief of staff of the brigade headquarters jumped out of the corner of his eye.

Fifty seconds per frequency hop,

That's every 0.02 seconds.

At present, the countries with the strongest communication technology, the United States and Germany, want to monitor and interfere with a channel that only appears 0.02 seconds at a time, and it is estimated that it will take a long time, and it will have to use large professional equipment and a lot of manpower.

The kind of forty or fifty communications specialists who start with.

Fifty channels.

That doesn't mean that in order to jam and monitor walkie-talkies one by one, it is estimated that it will have to be a brigade size, and the machinery and equipment are estimated to require millions or even tens of millions of dollars.

Isn't that safe?

From the seventies, the first generation of automatic frequency modulation technology shocked the chief of staff of the brigade headquarters.

"So, we have achieved 1,000 frequency hops per second on three generations of communication equipment."

And the let behind the expert made the chief of staff of the brigade headquarters not know what to say.

"Awesome!"

He silently spat out two words.

···

When the meeting on the side of the independent regiment ended, all the bigwigs, with a confused head, went back to the respective headquarters.

Beijing Review,

"Signal found!"

Wearing a plaster bandana, a devil communications technician shouted excitedly.

"They've found their communication signal!"

"Track it now."

"Track it now."

The technical leader of the rank of Nakasa immediately gave the order, and his voice was hysterical:

"Lock their channel."

With his order, hundreds of devils, more than a hundred radio stations, and seven large radio detection equipment, including the telecommunications group of the Front Army, were operating at full power at the same time.

The operator, wearing a headset, slowly and carefully turned the knob to adjust the channel, trying to lock the call channel of the Eighth Route Army.

"Slow down, listen carefully."

Taking a few deep breaths, the technical leader of the Nakasa rank, who had stabilized his mood, said softly.

As long as the communication channel of the Eighth Route Army is locked, the specific location can be located with the help of triangulation.

And then

You will be able to seize the complete Tubalu communication equipment.

Thinking of this, this devil technology leader's heart suddenly became hot.

Unlike artillery, communication equipment, the proportion of design is also very important, even if the enemy's components are extremely high, the empire cannot imitate them one by one, but the empire can always learn something.

It's just that the fiery mood lasted for ten minutes, and the devil technical leader felt that things were not good.

Ten minutes passed.

He gathered experts sent from the domestic base camp, as well as more than 100 telecommunications experts from the North China Front Army and the Republic of China Dispatch Army, plus the radio stations of the North China Front Army, and the latest telecommunications positioning and monitoring equipment specially made in China.

Didn't even analyze a single frequency?

Logically. It is only a matter of time before the communication frequency of the Eighth Route Army is analyzed.

"What's going on?"

Half an hour later, the leader of the devil technology, who finally couldn't help it, walked in front of a device in person.

"They..."

At this time, the machine operator was no longer in the control knob, and there was a stack of drafts on the table, and a huge fifty was particularly conspicuous in the messy handwriting.

There were already beads of sweat the size of beans on his forehead, and he muttered a sentence to himself repeatedly:

"How is that possible?"

"How is this possible?"

"Fifty inverters per second?"

"How is this possible?"

As he spoke, the devil tore open the scratch paper again and calculated frantically again.

(End of chapter)