"What paper?"

The team leader patted the engineer named Guo Lin on the shoulder, trying to bring some majesty to his tone, but the uncontrollable smile on his face made his efforts go to waste:

"Don't sell it, hurry up!"

Fortunately, the latter is not a person who is not light or heavy, and he quickly gave a further explanation:

"That was when we were working with the Second Electromechanical Bureau to cooperate with the Thunderbolt 11 and radar."

"One of the problems of the Thunderbolt 11 in recent years is that the angular velocity rate signal of the line of sight is not accurate, and the farther the distance of the bomb, the more serious the straight-wave spurious signal, and the echo signal cannot be detected up to 20 kilometers away. It wasn't until the end of last year that a comrade of the Second Bureau saw an algorithm paper published in a foreign journal and used the theory in it to update the filtering method to solve these two problems. ”

"At that time, our 14th institute found that for some specific deceptive active electronic interference, after the multi-target echo appeared in the tracking wave gate, the original echo and the new echo could also be processed by the filtering method, and then the two processing results could be compared with the target motion data of the original memory, and the real target could be judged."

The major general standing on the opposite side was a little confused by a large number of proper nouns in this passage, but he was an Air Force officer, and he still had a concept of things like filtering and echoes, so he also understood a lot.

However, Guo Lin has obviously entered the state, and is even ready to let the team leader in front of him challenge him with more in-depth knowledge:

"The specific implementation principle is actually known that the radar pulse repetition period, under normal tracking conditions, when the radar is relatively close to the target, the target echo is ...... earlier than the echo of the previous cycle."

"Alright, alright...... I already know that the pattern you're talking about is powerful. ”

The major general hurriedly raised his hand to interrupt:

"But if this mode solves spoofing interference, why set up a separate button? Wouldn't it be better to add it directly to the default operating mode of the radar? ”

Guo Lin, who was only halfway through the conversation, was still unsatisfied, but after all, he was facing a general, so he still stopped the topic:

"Because activating this mode will affect the reaction speed and refresh rate of the radar, it is better not to turn it on when it is not affected by anti-towing interference."

After a moment's hesitation, he added:

"Actually...... Because there are very few studies on towing interference in China, and it is basically in the theoretical or laboratory stage, although we have done this function, we have never had the opportunity to test it, and we are still not sure if it can work before this time......"

"Wait......"

Although he didn't know much about the theoretical content of the other party's mouth, the major general team leader quickly grasped the key point in this passage:

"The towing jamming you are talking about is the reason why the radar lost the target after the first three locks?"

The officers of the Chinese Air Force in the 90s must have paid close attention to the Gulf War.

In that war, both sides used a lot of electronic warfare capabilities, and the coalition forces used electromagnetic interference to disable the Iraqi army's air defense system, and the Iraqi army in turn used electronic warfare equipment to resist the coalition's precision-guided weapons, forcing the latter to dream of returning to Annan, and had to sacrifice the old method of carpet bombing to solve the problem.

So although he was a little impatient with Guo Lin's unfocused way of speaking just now, when he heard a pattern of electronic interference that "has not been studied much in China", he immediately became sensitive.

"I'm not sure yet, but since the anti-drying mode works, it should be."

The young engineer is still in the midst of excitement.

After all, it has been nearly 30 years since the last time the Huaxia Air Force shot down a target in actual combat, which can be said to be a record-breaking first result, and he himself unexpectedly played a key role in this process:

"The current fire control radar basically uses the Doppler effect to detect the target, which is a speed tracking system, and the speed wave gate towing jamming can give the radar a false speed information, so that the radar can track a false target, and the radar field of view in the tracking state is very narrow, and it will naturally be unlocked within a few seconds."

This time, his explanation was succinct and to the point.

"The MiG-25 had this ability at that time?"

The Major General was a little surprised that something that sounded a little complicated would appear on a 60s-designed interceptor fuselage.

This question really hits a blind spot, and it's really easy to miss this kind of detail when everyone is busy celebrating.

So Guo Lin on the opposite side also hesitated:

"I want to ...... There should be no, although the relevant theories appeared not late, but in the 60s, pulse Doppler radar was not widely used, and there seems to be no need for this, and the level of electronic engineering does not support it. ”

At this time, he also realized the problem.

"Could it be that there is another electronic warfare aircraft in the airspace?"

Such an out-of-tune speculation made the team leader a little speechless.

He waved his hand and was about to say something, when he saw a Chinese officer wearing the uniform of a lieutenant in the Pakistani Air Force trotting over:

"Report, the griffon's side reported that the target was deliberately controlled in speed and altitude before it was shot down, so the opposing pilot had parachuted, and the plane was generally preserved in the process of falling."

Hearing this, the eyes of the two people who were chatting about electromagnetic interference lit up almost at the same time.

It stands to reason that if an air-to-air missile hits at 2.2 times the speed of sound, the plane will directly disintegrate at high altitude, and the resulting debris will probably fall within a radius of thousands of square kilometers.

In addition, the nearby terrain is complex and inaccessible mountainous areas, and it is impossible for the Pakistani Army to completely search for the wreckage in terms of its organizational ability.

And if too many idle people are involved, there is a possibility that the news will leak.

However, if the target crashes as a whole, even if it falls to pieces after landing, the splash range is always limited, and the manpower and material resources required are much less.

The major general straightened out some ill-fitting military uniforms on his body, and quickly made a decision:

"This matter cannot be delayed, you immediately inform the Pakistani side of the situation, let them send a reliable airborne troops, as well as helicopters, and be careful not to leak the news, especially not to let their intelligence bureau of the three services know."

"Also, if you find a pilot who is parachuting, don't make it public."

"That domestic ......"

"I will report it in China, but now the situation is urgent, and if it drags on, it may increase variables, so I can only cut it first and then play it."

Hearing this categorical answer, the lieutenant was stunned for a moment, then stood up and saluted:

"Yes!"

"I think we will soon have an answer to our doubts."

The team leader looked at the back of the lieutenant leaving, took two deep breaths in a row, and then turned to look at Guo Lin:

"If we end up finding the kind of ...... you said on the wreckage of that plane. If we interfere with the equipment, with our current technical capabilities, is it possible to imitate the same equipment? ”

Later, he probably felt that his request was a bit excessive, so he added:

"As long as the function is the same, the specific performance can relax some requirements."

Guo Lin held his chin in one hand and lowered his head slightly, but his constantly rolling eyes proved that his brain was in a rapid state of thinking.

It was only after a few minutes that he finally answered:

"Such as ADC and FPGA these electronic components, in fact, everyone uses shelf products, PCB circuit board design and printing is not a problem, in fact, what we lack in China is the specific algorithm development and corresponding program design and parameter debugging capabilities, even if there are samples, unless they are particularly complete, otherwise they can only provide a certain reference value."

Hearing the end, the leader's mood fell.

He thought that this thing, like the missiles and drones that were imitated and captured back then, could be done in a relatively short time.

However, the solemn atmosphere did not last long.

"But speaking of which, our country's progress in this theory should be ...... very quickly recently."

Guo Lin seemed to suddenly remember something:

"After all, the influential paper I just talked about was written by two Chinese people."

"Although jamming and anti-jamming are not exactly the same thing, it seems that there are no commonalities in the case of algorithmic research."

"So you can ask for help?"

Hope reignited in the heart of the team leader.

"I can't guarantee it, but ...... You can try it when you return to your home country. ”

Thinking of this, Guo Lin is also a lot more relaxed:

"It just so happened that the 601 Institute asked us before if we could build a larger radar to install on the plane, and now the power supply of the two turbojet 14s with a total of 36kW has been wasted."

"If you can get a jamming device, you can put it on it."

(End of chapter)