Chapter 1121: Being on guard against others is essential


    "Extra preparation?"


    Liang Shaoxiu frowned slightly:


    "But according to the experience of colleagues in our sister units, customers in the Middle East generally... don''t care much about money."


    Chang Haonan thought that what the other party wanted to express was that big business owners did not care about cost-effectiveness when buying equipment.


    This can be regarded as a stereotype of domestic and foreign trade exports for a long time.


    "How is it possible..."


    He said and waved his hand:


    "Oil guys are just rich, not stupid... We see other people buying things without paying attention to the cost, because they are essentially spending money on more important things."


    Liang Shaoxiu was stunned for a moment, and then realized that they were not on the same channel.


    So he quickly explained:


    "No, what I mean is that the people they are responsible for purchasing generally don''t care much about money...at least they don''t care about the money we can afford."


    At this time, Chang Haonan also reacted and helplessly held his forehead:


    "What I mean by preparation is not to bribe the key personnel on the other side... but to prevent other competitors from causing harm during the bidding process."


    An international arms purchase project like this must be carried out in several rounds.


    Considering that none of the three companies that were actually selected currently have finished products, it will definitely be a battle between paper performance and the political power behind each at the beginning.


    But for such a large list, actual testing is inevitable in the end.


    And in this process, there are too many tricks that can be played.


    For example, when Persia went to the United States to purchase fighter jets, Grumman asked its F14A to turn on the engine first to consume part of the fuel.


    The actual thrust-to-weight ratio of the aircraft is not that ugly.


    Of course Liang Shaoxiu has heard this story, but in the final analysis he is still an honest man and lacks a deep understanding of the dangers of the international arms sales industry:


    "But if an early warning aircraft doesn''t care about maneuverability and bomb load...how can it cause trouble?"


    "You can''t secretly release interference during the test, right?"


    Chang Haonan couldn''t help but curled his lips:


    "It''s hard to say..."


    "Back then, the Greeks held a tender for new tanks. As a result, when the Challenger and Abrams were undergoing field tests, the French secretly sent agents to the test site to place jammers, causing the two models to not even follow the correct test routes. …”


    Liang Shaoxiu''s facial muscles twitched slightly, obviously he wanted to laugh but held it back:


    "So... the French Leclerc tank won in the end?"


    "That''s not true..."


    Chang Haonan shook his head:


    "Because the performance of these three products is very poor, the German Leopard 2A4 is cheaper."


    “…”


    Liang Shaoxiu finally didn''t hold back.


    Chang Haonan also couldn''t help laughing...


    After a while, the two of them stopped smiling and returned to the topic:


    "In any case, although it is relatively difficult to use these small means in the test of aerial equipment, we must have a sense of defense... On the one hand, we don''t have much dealings with the Swedes, but the Kingdom of David... we can''t expect them to have too much You know the bottom line."


    "On the other hand, you don''t need to bribe any decision-makers to cause sabotage in the test. You just need to open up some low-level joints. In this regard, the David Kingdom has been dealing with them for decades and is much better than us."


    Liang Shaoxiu lowered his head and thought for a moment, then analyzed:


    "As far as the aircraft itself is concerned, as long as there are no problems with the French personnel involved in the selection on site, there will be no hidden dangers. Besides, no matter how courageous David is, he is unlikely to tamper with the French aircraft, so the risk should be Just focus on the airborne radar part..."


    Having said this, he hesitated for a moment—


    Although he has continuously participated in or presided over the research and development of the three types of early warning aircraft, he is not an expert in the radar field after all.


    It would be safer to find comrades from the Electronic Technology Group:


    "Mr. Guo is still in the capital now. Comrade Fan Jimin is temporarily in charge of the equipment testing of the early warning aircraft. Do you need me to call him over?"


    Hao Jing, that’s what’s good about it.


    The local area has a well-established military industry, especially the military aviation industry.


    Problems that would have to be solved by flying elsewhere can be solved here by riding a bicycle.


    "Can."


    Chang Haonan looked at the time:


    "Just in time, I''ll also tell you about the early warning aircraft and some key points of the entire bidding..."


    The order from the big dog owner was too sudden.


    And at this juncture, it was impossible for him to abandon the half-finished project.


    The responsibility can only be entrusted to more reliable comrades.


    …


    After receiving Liang Shaoxiu''s call, it took Fan Jimin less than an hour to stand next to the former. "Academician Chang, I have admired you for a long time..."


    As a rising star promoted by Guo Lin, today was the first time for him to see Chang Haonan in person.


    Because of the excitement, there was obviously a bit of vibrato in his voice.


    Chang Haonan did not answer the question, and just handed the panting opponent a bottle of water:


    "The conditions here are average. We haven''t prepared any tea, so let''s use mineral water..."


    Within a few words, Fan Jimin calmed down again.


    Immediately afterwards, Chang Haonan repeated his worries to him, and then analyzed:


    "''Gaoming'' is a wide-bandwidth-angle radar with pulse compression processing capabilities. It is indeed less susceptible to interference in general. Of course, everything has two sides. If the other party is prepared in advance to target it, it is not without its weaknesses."


    "If you think about it from the perspective of the interferer, the most effective way is probably to take advantage of the fact that the working wavelength of broadband radar is much smaller than the size of the target, and use inter-pulse coherence accumulation technology to carry out intermittent sampling and forwarding interference..."


    “…”


    The range resolution unit of broadband radar is much smaller than the target size. Therefore, a complex target illuminated by a signal can be regarded as a collection of scattering centers. The echo signal is no longer a simple copy and delay of the transmitted signal, but contains local subtleties. Characteristic composite signal of multiple scattering centers.


    In other words, the resolution is higher.


    This characteristic makes it difficult to effectively accumulate the echo signal energy of the broadband radar within a repetition period, and it is almost impossible to interfere with the method used by Chang Haonan on the Konggan 100 pod.


    But as a price, once the coherent interference obtains sufficient processing gain and even performs characteristic fine modulation of the interference signal, the damage caused to the echo signal of the broadband radar system will be more serious.


    It can be understood as "Precision things are not prone to problems, but once problems occur, it is difficult to solve them."


    Fan Jimin''s reaction was also very quick:


    "Then the best response strategy should be to develop more effective low-interception technology so that the other party cannot perceive the radar search signal at all?"


    It should be said that anyone who can be favored by Guo Lin must have no problem with his abilities.


    But the experience is still lacking.


    "Low interception technology does cure both the symptoms and the root cause, but it requires major changes to the radar from beginning to end."


    Chang Haonan replied:


    "According to what Comrade Shaoxiu learned, Party A''s initial plan comparison phase should start soon. The entire bidding is expected to be completed within 18 months. We hope to receive the first aircraft in 2005... I''m afraid we don''t have that many time."


    "That…"


    Fan Jimin looked troubled.


    Electronic warfare actually has very strong turn-based characteristics.


    Everyone learns the same set of things. Basically, you make a move and I take the move. The upgrade path is very clear and there are not too many tricks.


    And generally speaking, the difficulty of interference is much lower than that of anti-interference.


    Especially in the context of this kind of bidding.


    Because the other party doesn''t have to completely disable your equipment, it just needs to slightly affect the work efficiency.


    Even if a radar is one generation ahead of its time, if it is deliberately targeted, the latency will inevitably increase or the resolution will deteriorate.


    In actual combat, this will have no impact.


    But when compared with Party A’s eldest father, the gap is very obvious.


    After a brief silence, Chang Haonan was the first to break the deadlock:


    "Actually, the pulse-to-pulse coherence accumulation technology itself is not very mature yet. In addition, the David Kingdom will not really fly an electronic jammer to cause trouble. It is more likely to target a specific radar waveform..."


    "So we can preset commonly used waveforms such as truncated M sequence signals, OFDM signals, and LFM signals, and switch directly if there is a problem..."


    “…”


    Fan Jimin''s eyes widened slightly.


    The so-called low interception technology is generally also called flexible beam control.


    It can be understood that the beam characteristics and parameters are adjusted through algorithms to avoid being analyzed by the other party.


    Chang Haonan''s idea is equivalent to starting a horse in a local way.


    Flexible, but not completely flexible.


    But it’s just as he said just now.


    It is enough to deal with the small tricks that the opponent may use.


    "Then after I go back, I will ask the institute to make some adjustments to the radar control system..."


    Chang Haonan nodded, and then gave a special instruction:


    "Don''t disclose this matter to the French side for the time being. At least we have to wait until the first phase of the bidding is over..."


    (End of chapter)