Bagaimana melindungi video drone secara real-time dari gangguan? Berikut adalah artikel relatif tentang menghentikan drone FPV untuk melindungi video, menurut kami pemancar dan penerima video nirkabel digital COFDM direkomendasikan.
Terjemahkan Berita dari https://fokus.ua/digital/673099-shtory-protiv-fpv-dronov-kak-rabotaet-novaya-reb-rossii.
Buta dan jatuh: Bagaimana “REB-tirai” hentikan drone kamikaze Ukraina dan apakah ada perlindungan (video)
Penindasan saluran video drone FPV unit Ukraina telah menjadi fenomena yang sering terjadi di medan perang. Para ahli mengatakan bahwa ada kemungkinan untuk menentangnya.
Pasukan Rusia kini cukup efektif menggunakan peralatan peperangan elektronik yang mengganggu transmisi video dari drone penyerang FPV. Fokus menemukan cara kerjanya, what damage it does to the Defense Forces of Ukraine, and how to protect yourself.
Itu “mata” drone ditutup: ancaman baru di lini depan
Military consultant Serhiy Beskrestnov, with the pseudonym “Flash”, wrote on Facebook at the end of September that many Ukrainian FPV drone pilots are hindered by the Russians’ EW devices, which affect the video signal. The people nicknamed them “tirai” – after the shape of the obstacle that appears on the screens. As a result, operators cannot control the aircraft because they cannot see where they are flying.
Russian fighters first intercept the video of an unknown FPV drone at a certain frequency, determine that it is hostile – by the name of the unit, which is written in the OSD menu, or by the increase in signal strength, after which they estimate the battery charge and the time for which the jamming should be turned on.
“This is especially a problem for repeaters. They hang high, see far, and even 20-30 km away, their video receiver can be an obstacle. There would be power. So far, many are getting away with changing and selecting frequencies, but this solution is banal, painful, and temporary,” – writes “Flash”.
Bagaimana “tirai” bekerja: pro dan kontra
An engineer of the “Sky of Victory” project, which produces “Grim” FPV drones for the Ukrainian army, expressed his opinion about the obstacles to Focus anonymously. According to him, “Curtain”-type devices affect only the video channel, throwing off the synchronization between the video transmitter on the drone and the pilot’s video receiver. As a result of the action of the system, after losing the image from the drone, the pilot cannot navigate in space and continue the flight, in such conditions, the copter simply falls.
“It is designed specifically to combat FPV drones,” the specialist noted.
Serhii Gerasimyuk, the founder of Antidron Ukraine, a company that produces EW devices, explained to Focus in more detail how it works. It is impossible to suppress the analog video signal affecting the FPV drone because it has a Video Transmitter (VTX), yaitu, a transmitter, but there is no receiver in the same range, so it does not “listen” to anything.
Suppressing video in the case of FPV drones is only possible by creating radio interference to the pilot’s receiver. It is impossible to do this with a dome because the operators are never 50-200 meters away from the working EW devices.
“On the market, there are a lot of offers of EW-domes with video suppression. But this speaks of only one thing – about the expertise of the manufacturer, or rather, ketidakhadirannya sama sekali,” pengembang mencatat.
Untuk menekan video drone FPV, kompleks yang kuat dengan antena yang diarahkan ke musuh “sarang” diperlukan jumlah pilot. Untuk melakukan ini, Anda perlu mengetahui azimutnya, yaitu, arah ke mana harus mengarahkannya. Itu hanya dapat diinstal dengan bantuan sarana teknis intelijen radio-elektronik (ADALAH), baik khusus maupun murah “penerima video” dengan pencarian otomatis untuk rentang yang diinginkan, yang dapat ditemukan di Aliexpress.
Operator peralatan tersebut mencegat “gambar” dan harus menentukan medan secara visual, serta perkiraan lokasi pilot musuh. Antena kemudian diarahkan dan interferensi dibuat pada frekuensi yang sama dengan sinyal video.
“Ini bukan kubah tempat Anda berada “dihidupkan dan lupa”. An effective countermeasure of this type is already a certain complex, algorithm of actions. And only timely, consecutive actions allow you to achieve a positive result. That is, it is at least a two-person calculation with everything necessary for timely interception video, determination of the direction, the presence of a directed “jammer” on that range, operational guidance, and setting obstacles. And all this must be done before the FPV arrives at the target it was flying to,” stressed Serhiy Gerasimyuk.
Even with everything in place for success, EW operators may lack the time or reaction to determine direction and direct their devices. But despite all the difficulties, the algorithm has a certain percentage of efficiency. In addition to the usual video bands (5.8/1.2 GHz), both sides also use non-standard bands (1.5/3.3/4.9 GHz), for which there are no means of intercepting the video channel, or their choice is quite limited due to their less “popularity”. Everything depends on the availability of all the necessary means, and even in this case, fighters may not know where to direct the available means of countermeasures.
Apakah mungkin untuk menerobos “tirai”
The engineer of “Sky of Victory” says that it is quite possible to counteract the suppression systems of video signals of FPV drones. Such solutions already exist, but the engineer did not go into details, so as not to simplify the life of the enemy and not to give hints on how to bypass the Ukrainian analogs of “tirai”.
In the network, experts are discussing replacing the analog video channel with a digital one, and the above-mentioned Sergey Beskrestnov also supports this option. The representative of “Sky of Victory” believes that digital systems will help solve only some highly specialized tasks because they have a number of pros and cons.
“Unfortunately, digital wireless COFDM video transmission system takes a long time to recover after signal loss and does not allow quick response to the situation in flight,” dia berkata.
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