Everyone's attention was once again attracted to Chang Haonan's side.

"What do you mean by ......?"

The engineer who had just proposed to design different functions for the two pods and then divided the work together also looked at it.

He genuinely felt that his plan was perfect.

Although it can be regarded as opportunistic in a sense, it is at least a relatively technical level of opportunism.

"I think it's feasible to let the receiving and transmitting antennas work time-sharing, as Guo Gong just mentioned."

Chang Haonan's words made Xu Yang's eyes widen.

That expression is basically "I read a lot, you can't fool me".

But then he continued:

"However, the traditional two methods, whether full pulse or short pulse, work in units of a time width of the captured radar signal, and even the latter only uses a small segment of the radar signal to carry out end-to-end cyclic forwarding, and a new receive-calculate-send process will not be started until the next time width."

"But we can use the signal of half the width of the pulse emitted by the radar as the interference signal on the basis of keeping the overall structure of the current hardware unchanged."

"Half the width?"

This slightly surprising proposal initially caused some small waves in the crowd.

However, it soon became clear that this approach could theoretically work.

This is especially true for chirp pulse compression radars, which are becoming more and more common.

It's just that, even in the United States, electronic warfare is still in the wild stage of development, and I haven't heard of anyone systematically demonstrating this.

"However, if the previous sampling is still used to store the signal and wait for half a cycle before forwarding, then it will only change the distance of the false signal lag from 10-15km to 5-7.5km, which is not deceptive to the radar or the radar operator, and it will not play the role of covering the real target."

It was the same engineer who spoke, and it was clear that he still wanted to struggle with his plan.

"You're right, so I chose not to go through this storage process."

This statement is even more astonishing, because one of the significant advantages of DRFM-based digital jamming compared with traveling wave tubes to achieve phase-modulation and frequency shift is the ability to store frequency.

"Of course, strictly speaking, it doesn't go through a complete storage process."

Chang Haonan revised his statement again.

Guo Lin, who was already familiar with this scene, immediately took out a pen and paper from the briefcase he was carrying and handed it over.

He knew that what he should do at such times was to watch the big guys perform and see what he could learn from them.

If you have the opportunity, you can be a compliment by the way.

Chang Haonan also habitually took it directly, and then began to draw the schematic.

However, this time the content is relatively simple, just a simple coordinate axis.

"My idea is that when the receiver intercepts the large time width radar signal, only a small section of the signal will be processed immediately after high-fidelity sampling, and then forwarded by the transmitter, and then the second section of sampling and processing and forwarding the next section, so that the cycle is sequential, and the sampling and forwarding time sharing alternately works until the end of the large time width signal."

"The receiver and transmitter of the jammer work time-sharing over the entire pulse width, which can perfectly achieve time isolation, and since the time of each sampling and the relay time are the same, it is possible to capture exactly half of the pulse transmitted by the radar, achieving the half-width signal interference I just mentioned."

That's the benefit of not having a fixed mindset.

Compared with the model of sampling half-cycle-forwarding half-cycle, Chang Haonan's proposal actually only shortens the cycle of this process, but it is very different from the former in terms of the effect of generating false targets.

Not to mention operating on a full-cycle basis.

But that's not all, of course.

The real core technology is behind:

"In addition, the processing algorithm in this cannot continue to use simple direct forwarding methods, which will only generate a main and false target that is completely consistent with the real target and 2-3 realistic and false targets with confusing value, and the rest will have no actual value."

"But if we use repeated forwarding or circular forwarding on the jamming algorithm......"

"......" (you won't be interested in either algorithm)

"In this way, a huge number of realistic false targets with strong amplitude can be generated in 2-10 microseconds before and after the real target, which is very suitable for accompanying electronic warfare aircraft to carry out team jamming or tactical aircraft to self-defense jamming, and the specific false target generation characteristics can also be adjusted by changing the processing parameters in the pod control software to adapt to different combat environments."

Chang Haonan put down the pencil in his hand, which was already a little dull, and looked up at everyone.

"Hmm...... In this case, we need to replace it with a new FPGA, but beyond that...... It seems that it can be done on the basis of the original circuit. ”

After listening to this idea of "intermittent sampling and repeating cyclic forwarding interference", Xu Yang almost immediately thought of the key points of improvement.

"In addition, it is best to modify the antenna structure and replace it with an Archimedean spiral antenna, and the two arms are equal amplitude inverting feed, so that two-way circularly polarized radiation can be obtained in a wide frequency band, and the input impedance of the antenna in a wide frequency range remains unchanged."

Chang Haonan continued to add.

"Understood."

Guo Lin next to him has memorized several pages full of notebook contents, although the response is slower than Xu Yang, but after all, he is also a formally trained engineer, and has begun to think about how to complete this prototype upgrade with minimal modification in the engineering design of the pod:

"The replacement of the antenna and FPGA is not complicated in operation, I can even do it manually, I can send these requirements back to Jinling, let the corresponding components be made and sent over, we will replace them on site, as for the middle few days, we can focus on testing the No. 1 pod."

Guo Lin proposed the most compact plan in terms of time.

There's no way, time waits for no one, and the No. 713 machine is still borrowed from the 38 Institute after all, and it's not good to keep occupying it and not returning it to others, so it can be faster than a day.

Everyone quickly reached a consensus and proceeded with the experiment according to the plan above.

The No. 1 pod is not without value, although the algorithm proposed by Chang Haonan is very ingenious, but in the final analysis it is still a compromise method, if you really want to talk about the actual performance, in the case of consistent component specifications, it cannot be compared to the former by opening the space distance to achieve transmission and reception isolation, and can work in the full receiving and sending mode.

Sometimes, big, really is good.

Therefore, on the integrated electronic warfare aircraft of the Y-8 platform, where space is not tight, there is no need to use the intermittent sampling scheme at all.

"In addition, I went to Factory 172 last night to take a look, and they happened to have a J-7 mid-life upgrade that was about to be completed, and after the No. 2 pod on our side was tested on the No. 713 machine, it could be directly installed on the Flying Leopard platform to see the actual effect of the team jamming mode and the self-defense jamming mode."

After all, relying on a Y-7 simulated attack aircraft is indeed outrageous.

After the solution has been come up, the atmosphere in the whole conference room is not as heavy as it was at the beginning.

"If I use the J-7 test again, I feel like I have to find another brother unit to cooperate."

One engineer said in a joking tone:

"I just heard from the test flight institute that the 139th Division Anti-aircraft Artillery Regiment told the test people that their regiment commander was hit quite a lot after the first two rounds of testing, and it was not until the second half of our No. 2 pod was not effective that it eased up a little."

There was a burst of merry laughter.

"You really can't get wool on the big brother of the army."

Chang Haonan also smiled and waved his hand:

"And this time we are in a hurry to test, we can't contact other troops, and the artillery sighting radar can't be regarded as a particularly good hypothetical target, next time we will try to find an air defense missile regiment of the Air Force to try the effect!"

Actually, it's not that I don't want to write a few more words (the formula without spaces is only 1 character, in fact, there is no way to water the number of words), mainly after the revision, the starting point can not recognize some special symbols and Greek letters, resulting in all garbled characters and question marks......

(End of chapter)