Chapter 207 Seizing the jamming pod!
“What paper?”
The team leader patted the engineer named Guo Lin on the shoulder, trying to bring some authority into his tone, but the unstoppable smile on his face made him His efforts were in vain:
“Stop talking about it, tell me quickly!”
Fortunately, the latter is not a light-hearted person, and he quickly gave further advice. Explanation:
"That was what happened when we were working with the Second Bureau of Electromechanical Engineering on the cooperation between Thunderbolt 11 and radar."
"One of the problems with Thunderbolt 11 in recent years is that the line of sight angular velocity signal extraction is not accurate, as well as the missile-aircraft distance. The farther away, the more serious the direct wave spurious signal, and no echo signal can be detected up to 20 kilometers away. Until the end of last year, a comrade from the Second Bureau saw an algorithm paper published in a foreign journal and used that method. The theory inside solves these two problems by updating the filtering method. "
"At that time, our 14th Institute discovered that for certain deceptive active electronic interference, multiple target echoes appeared in the tracking gate. After the wave is generated, that filtering method can also be used to process the original echo and the new echo, and then the two processing results can be compared with the original memorized target motion data to determine the real target. ”
The major general standing opposite was a little confused by the lot of proper nouns in this paragraph, but he was an Air Force officer after all, and he still had concepts about things like filtering and echo, so he understood it. Seventy-seven or eighty-eight.
However, Guo Lin has obviously entered the state, and is even ready to challenge the team leader in front of him to learn more in-depth knowledge:
"The specific implementation principle is actually that the radar pulse repetition period is known. Under normal tracking conditions, when the radar is relatively close to the target, the target echo is ahead of the echo in the previous cycle..."
" Okay, okay... I already know that this mode you are talking about is very powerful."
The major general quickly raised his hand to interrupt:
"But since this mode can solve the deceptive interference, Why do we need to set up a separate button? Wouldn’t it be better to add it directly to the radar’s default working mode?”
Guo Lin was still halfway through his words, but after all, he was facing a general. Still stopped talking about the topic just now:
"Because turning on this mode will affect the reaction speed and refresh rate of the radar, it is best not to turn it on when there is no anti-tow interference."
After hesitating for a moment, he added:
“Actually... because there is very little research on towing interference in China, and they are basically in the theoretical or laboratory stage at most, so although we have built this function, we have never had the opportunity to test it. Before this time, I was still not sure whether it would work..."
"Wait..."
Although he had little understanding of the theoretical content of the other party, the major general leader quickly grasped Remember the key points in this passage:
"The tow interference you are talking about is the reason why the radar lost its target after locking it for the first three times?"
The Chinese Air Force officers in the 1990s must have paid close attention to the Gulf War.
In that war, both sides used a lot of electronic warfare capabilities. The coalition used electromagnetic interference to disable the Iraqi air defense system, and the Iraqi army in turn used electronic warfare equipment to resist the coalition's precision-guided weapons. , forced the latter to dream of returning to Annan, and had to resort to the old method of carpet bombing to solve the problem.
So even though he was a little impatient with Guo Lin's unfocused way of speaking just now, when he heard an electronic interference mode that "has not been studied much in China", he immediately became sensitive.
“I wasn’t sure yet, but since the anti-drying mode works, it should be.”
The young engineer is still in a state of excitement.
After all, it has been nearly 30 years since the last time the Chinese Air Force shot down a target in actual combat. It can be said to be a record-breaking first victory, and he himself unexpectedly played a key role in this process:
"Current fire control radars basically use the Doppler effect to detect targets. This is a speed tracking system, and speed gate drag interference can give the radar a wrong speed information, allowing the radar to track A false target, and the tracking radar has a very narrow field of view, so it will naturally be unlocked within a few seconds."
This time his explanation was concise and concise.
“Did the MiG-25 have this capability at that time?”
The major general was a little surprised that this complicated-sounding thing would appear on an interceptor fuselage designed in the 1960s.
This question really hits a blind spot. When everyone is busy celebrating, it is really easy to miss such details.
So Guo Lin on the opposite side also hesitated:
"I think... there should be no such thing. Although the relevant theories appeared not too late, in the 1960s, there were many pulses Puller radar has not been widely used, there seems to be no demand for it, and the level of electronic engineering does not support it."
At this time, he also realized the problem.
"Is there another electronic warfare aircraft in the airspace?"
Such a wild guess left the team leader speechless. He waved his hand and was about to say something when he saw a Chinese officer wearing the uniform of a Pakistani Air Force lieutenant trotting over:
"Report, the Griffin reported that the target was intentionally controlled before it was shot down. Speed and altitude, so the other side's pilot has parachuted, and the aircraft was generally relatively intact during the fall."
Hearing this, the two men were chatting about the electromagnetic interference issue. Everyone's eyes lit up almost at the same time.
Logically speaking, if hit by an air-to-air missile at 2.2 times the speed of sound, the aircraft will directly disintegrate at high altitude, and the resulting debris will probably fall within a radius of tens of thousands of square kilometers.
Coupled with the fact that there are complex terrain and inaccessible mountainous areas nearby, it is impossible to completely search for the wreckage based on the organizational capabilities of the Palestinian Army.
And if too many people are involved, the news may be leaked.
But if the target crashes as a whole, even if it falls into pieces after landing, the splash range will always be limited, and the manpower and material resources required will be much less.
The major general adjusted his military uniform that did not fit him well and quickly made a decision:
"This matter cannot be delayed. You should immediately notify Pakistan of the situation and ask them to send a reliable airborne force and helicopters over. Be careful not to let the news leak out, especially not to let their Inter-Services Intelligence Agency know."< br>
“Also, if you find the pilot who parachuted, do not make it public.”
“Then domestically...”
“I will report it domestically, but the situation is urgent now. If you delay it, it may only increase the variables, so you can only kill it first and then report it."
Hearing this decisive answer, the lieutenant was stunned, then stood at attention and saluted:
"Yes!"
"I think our doubts just now will be answered soon."
The leader looked at the lieutenant's leaving figure, took two deep breaths in succession, and then Turning around and looking at Guo Lin:
"If we finally find the kind of... jamming equipment you mentioned on the wreckage of that plane, is it possible with our current technical capabilities in China? Copy the same equipment?”
Then he may have felt that his request was a bit excessive, so he added:
"As long as the functions are the same, some requirements for specific performance can be relaxed."
Guo Lin held his chin with one hand and lowered his head slightly, but his eyes that kept rolling proved that his brain was thinking rapidly.
After about a few minutes, he finally answered:
“Electronic components such as ADC and FPGA, in fact, everyone uses shelf products, PCB circuit board design and Printing is not a problem. In fact, what we lack in China is specific algorithm development and corresponding programming and parameter debugging capabilities. Even if we have samples, unless they are particularly complete, they can only provide a certain reference value. "
After hearing the end, the leader's mood dropped.
He originally thought that this thing could be done in a relatively short time, just like the missiles and drones that were imitated and captured back then.
But the solemn atmosphere did not last long.
"But speaking of which, our country should have made rapid progress in this theory recently..."
Guo Lin seemed to suddenly remember something:
"After all, The influential paper I just mentioned was written by two Chinese people.”
"Although interference and anti-interference are not exactly the same thing, it seems that there is no commonality in algorithm research."
"So you can ask for foreign aid?"
The leader's heart Hope was rekindled.
"I can't guarantee it, but... I can try it after I return to China."
Guo Lin felt a lot more relaxed when he thought of this:
"It just so happened that the 601 Institute asked us if we could build a larger radar and install it on the aircraft. Now the total power supply of the two turbojet 14s, 36kW, has been wasted."
"If If you can get a set of interference equipment, you can try to install it on it.”
(End of this chapter)