Interpretation of the development of communication interference technology
A new trend in electronic attack systems is to suppress enemy communication systems while ensuring minimal damage to the Allied capabilities.
For the modern military, there are many difficulties in using RF interference opportunities in networked combat space. Its own communication systems and communication systems of friendly forces, civil entities (including government agencies, NGOs, companies and individuals) are highly dependent on uninterrupted access to radio waves.
The military must be able to protect its forces from RCIED, interfere with enemy tactical communications systems, and destroy its surveillance, target acquisition, positioning and weapon-guided radars and artillery shells while maintaining its own communications and The synergy of allies and only causes minimal collateral damage.
To this end, a new generation of smart, multi-functional military protection and electronic attack systems is emerging, thanks to advanced software-defined radio and computer processing technologies.
Same goal
Despite advances in technology, the fundamentals of electronic warfare have never changed. One of the points is that the target of any communication jammer is always the radio receiver. The receiver may be part of a combat airborne radar system, a missile seeker, an armored vehicle combat radio, a soldier's personal mission radio, or a mobile phone connected to an IED bomb.
The task of the jammer is to ensure that the enemy receiver and its associated signal processing system are unable to extract the required information, either by using a noise-insensitive signal, that is, to cover the interference, or by having the radar processor derive the error speed or position information of the tracked target. , that is, deception interference. For example, jammers used in combating IED missions typically use coverage interference to prevent receivers in the bomb from acquiring explosive signals, while self-defense jammers on aircraft may use deceptive interference to track enemy radars to false targets.
Whether suppressing the effective signal with noise or deceiving the position of the target on the radar processor, the jammer usually has to overcome the power disadvantage, that is, the jammer has to cover all the fundamental frequencies and orientations at the same time, unless it has obtained very accurate information. . This usually means that the jammer is transmitting high power signals over a wide frequency band, which is very unfriendly to the radio communication system.
For a long time, operators have had to face this problem when allocating the entire communication plan, which is exacerbated by the rapid expansion of RCIED threats and tactical battlefield networks. While proper planning can lead to some mitigation, warfighters often have to choose between communication systems and countermeasures.
Friendly
Harris' iProTxS is an independent judgment box connected to radio equipment and electronic countermeasure equipment
There are many ways in which the industrial sector can solve this problem, but the two methods that are widely considered to be the most effective are the intelligent management of the jammer itself, and the use of intermediate technology to correlate jammers and communication radios on the platform. They can be "friendly" together. The second of the best is Harris, which manufactures integrated protection and transmission systems (iProTxS) (iProTxS was previously produced by Exelis, which was acquired by Harris in 2015), and iProTxS uses independent judgment boxes with radios and electronics. Against vehicle connections, there are currently vehicle-mounted and soldier-backed models.
At the International Defence and Security Equipment Exhibition in London, UK, in September 2016, Chris Reith, general manager of Harris's Besinstock plant in the UK, described the previous communication in a strong electronic interference environment. The limitations of the method, such as the use of frequency filters.
“They are very large and can only work in fixed frequency bands, thus limiting the capabilities of radiocommunication systems, as most radiocommunication systems operate over a wide frequency range and hop, especially in tactical environments,†he said. Some public communication technologies may be used to interfere, intercept or locate them."
Rees said that if the enemy finds that the particular frequency band used by the filter system is working, they know where to concentrate. In contrast, the technology used by iProTxS is not frequency-based, allowing radios to use all of the design bands, and the system can also have electronic anti-jamming technology when the jammer is working. He said: "It works between the radio and the jammer, making the communication very secret, not being noticed or affecting the jammer."
Communication reservation
In order for communication radios and jammers to connect and communicate with each other, Harris has adopted a rigorous protection technique that preserves most of the communication capabilities of the radio during interference.
Rees said: "When you work in an electronic countermeasures environment, it will affect your communication to a certain extent. iProTxS can get you about 80-90% communication ability."
He said that in Afghanistan, the demand for similar iProTxS systems is becoming more and more obvious. The escort operations there rely heavily on using electronic countermeasures to counter RCIED threats. Therefore, not only must they choose between protective interference and communication, but also protection and coordination. Choose between.
Rees said: "When they open jammers in a normal environment, they will lose coordination and communication with the ground allies. What iProTxS does is not only to keep communications throughout the escort, but also to allow all the tactics in the combat area. The military also maintains communication."
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