Chapter 271 Hunting Hunters, Annihilating Hongdian 7 (10,000 per day)
Fortunately, Guo Lin is used to this situation.
What's more, according to Chang Haonan, there is nothing to lose if you can publish a good journal.
At least it can be used when evaluating senior professional titles in the future.
“I need some time.”
Chang Haonan had already formed a general outline of this idea in his mind, but the more he dug deeper, the more he realized the complexity of this thing. It was definitely not something he could calculate on the spot in this conference room with a piece of paper and a pen. of:
"Researcher Xu, do me a favor, this time may be a bit complicated."
"No problem, what do you need me to do?"
Xu Yang stood up , followed Chang Haonan towards the nearby computer room.
“Improve some algorithms, of course it’s just some of my ideas now…”
Only Guo Lin and others were left looking at each other.
"Gong Guo... what we are going to do next is..."
Another colleague who was quite confident with Guo Lin was also confused by this sudden change in the situation.
"Alas... let's sort out this set of things first. According to Chang Gong's opinion, publish IEEETransactionsonAerospaceandElectronicSystems, which can be regarded as a small top journal..."
Yan Liang's side is in the first chapter. I received brand new components from Institute 14 the next day, but Chang Haonan asked me to put the modification work on the No. 2 pod on hold for now.
He has confirmed the feasibility of this new theory through the system, and the next step is to implement the algorithm model step by step.
Once completed, it can greatly improve the performance of the planned JH-7 electronic warfare aircraft.
It is even possible to rely on this technology to directly track targets beyond the normal radar detection range!
……
Four days passed quickly.
Chang Haonan and Xu Yang gathered everyone from Institute 14 back into the research room.
“You should have all read the paper on volumetric Kalman filtering that Researcher Xu and I published?”
Chang Haonan skillfully took the new paper and pen from Guo Lin’s hand, asked the engineers around him.
Everyone nodded:
“Of course I have seen it.”
"Theoretically, by applying the CKF algorithm to the nonlinear observation equation, radar registration bias correction and target state prediction can be achieved. Combined with maximum likelihood estimation, target data can even be processed in batches..."
< br>Chang Haonan first briefly introduced the ideal situation, which is not difficult for everyone to understand.
“But in actual applications, we will definitely miss some signals, and there will be a lot of clutter in the area. The CKF algorithm is actually not that easy to use.”
"So facing this reality, instead of blindly trying to avoid these irrelevant third-party clutter, we should find ways to use them to enhance passive detection of targets."
"Using third-party clutter ?”
Another engineer behind Chang Haonan’s eyes lit up:
“I have a younger brother who serves in the submarine force. I heard from him that nuclear submarines from both the East and the West had a tactic during the Cold War, which was to deploy a missile at a known location. The mine is then detonated at a specific time, using the sound waves generated by the mine explosion to conduct an active sonar detection of targets in the entire area without exposing itself, which is much better than pure passive sonar.”
The former was a little surprised that someone could compare his ideas in this way:
"Yes, the mine you are talking about is our third-party signal source. It can be a Civilian weather radar, a signal tower, or even radar waves emitted by other friendly or enemy forces in the area will work, but the stronger and more regular the signal, the better the effect will be."
"Of course. Researcher Xu and I also combined the sequence difference histogram method to further improve the PRI algorithm mentioned by Guo Gong. The combined effect of the two methods will be a surefire success in electronic warfare.”
"However, the speed of naval warfare is measured in minutes, while the speed of our electronic warfare is measured in microseconds, and targets often have speeds of hundreds or thousands of kilometers per hour, so the accuracy and speed of our data processing are fundamentally different. "
"So I call the set of things I'm going to talk about below the Random Finite Set Theory (RFS)..."
Chang Haonan said and took out almost everything from under the table. Calculating the thickness of a book.
“woc…”
Guo Lin was so shocked by this scene that he almost exploded. "First, let's define what a random finite set is."
This time, what he was going to talk about had already been printed out on paper, so he didn’t have to worry about writing and drawing:
“For a locally tight Hausdorff can Divide the space E and represent the set of all finite subsets in it as (E). Then, a random finite set Ξ on E can be defined as a measurable map Ξ:Ω→(E)..."
"For an RFSΞ, the number of elements is expressed as |Ξ|, which is the potential of RFS. In addition, the elements in RFS are disordered, that is, the necessary and sufficient conditions for RFSΞ and RFSΞ′ to be the same are: (1) |Ξ|= |Ξ′|, (2) If the element ∈Ξ, then ∈Ξ′”
“…”
"..."
"In short, if we design a radar, including post-processing software of course, and implement this model in engineering, we can passively target the target without actively emitting radar waves at all. detection, and can achieve effective monitoring and tracking.”
When Guo Lin handed Chang Haonan the brewed tea for the eighth time, the theoretical explanation that lasted for more than four hours finally came to an end.
“Any more questions?”
Silence.
The only sound that could be heard throughout the room was the hum of energized fluorescent tubes.
Chang Haonan took a sip of water.
He knew he needed to set aside some time for everyone to think.
After all, even Xu Yang, even himself, who was cheating on the system, had to go through it for a while before he fully understood it all.
"Uh..."
The first person to speak was Guo Lin:
"If you think about it this way, wouldn't it be quite invincible? As long as our radar backend has enough computing power, even stealth targets can't escape?"< br>
"And this should not only be an electronic warfare method, all targets can be detected using this method."
Another person also replied with a look of astonishment.
“In theory, of course.”
Chang Haonan put down his water glass and nodded:
“But you just said that you need to have enough computing power first. In fact, of course it is not that beautiful, and because the third-party radiation source or the target radiation source is not controlled, , passive radar cannot guarantee continuous operation, or requires a self-sacrificing unit of ours to serve as the radar source, such as a large drone or something..."
"In short, based on our current actual situation It seems that it is best to combine passive positioning technology to play a role in counterattacking the opponent's SEAD operations."
"Is it also effective against ground radars?"
Logically speaking, this kind of reliance should be used. The technology of radar target detection should be mainly used for air defense.
"No, no, no, you didn't understand what I meant."
Chang Haonan shook the pen in his hand:
"It's not a SEAD operation, it's an anti-SEAD operation."
< br>“When they want to hunt our radar, even if our ground radar is jammed, the radar waves emitted can still be regarded as an effective third-party radiation source for detecting the other party’s electronic warfare aircraft.”< br>
“The mantis stalks the cicada, and the oriole stalks behind.”
"It just so happens that the JH-7 in Factory 172 is at the end of its transformation. If we move faster, we can actually verify this tactic on it."
"So...we can also count it as, Developed a countermeasure algorithm for electronic warfare?”
Guo Lin never expected that the countermeasures that the 14th institute had been pursuing for several years would be realized through this method— —
You can interfere with me, but I can also directly kill your whole family.
Today is a day worth celebrating Double 11
(End of this chapter)