Principles of the new Doppler Jammer and its threat analysis to radar systems
- thejammerblockersh
- Oct 12, 2024
- 2 min read
Jammer is a new type of radar electronic countermeasure technology, which generates effective jamming signals by simulating the Doppler frequency shift characteristics of target echoes, and mainly targets pulse Doppler radar, synthetic aperture radar, and other radar systems that are sensitive to the target's movement, and it has a serious threat effect.
Doppler Jammer working principle.signal blocker first receives and analyzes the pulse signals transmitted by the radar, and obtains the radar operating frequency and waveform parameters. Then according to the relative motion between the hypothetical target and the radar, it calculates the expected Doppler shift value, and generates jamming signals with corresponding Doppler shifts based on this. These jamming signals are highly consistent with the real target echo signals in terms of frequency, time, phase and other characteristics, which can easily deceive the radar tracking gating and filters.
Destruction of radar tracking capability.Doppler Jammer can effectively interfere with radar's detection, capture and tracking of moving targets. Once the radar's automatic tracking gate is occupied by an analog signal, it is difficult to distinguish it from the real target signal. Even if manually intervene, due to the high degree of similarity between the jamming signal and the target echo, it is difficult to distinguish the authenticity, which leads to radar malfunctions such as target loss, azimuthal scattering and false targets.
Impact on radar range and speed accuracy.blue tooth jammer can introduce false Doppler shift, which makes the radar's estimation of the target's motion state biased, thus affecting the target's indicated position, heading angle, and so on. For guidance and tracking scenarios that rely on accurate speed measurements, this type of interference can have a serious impact.
Reduced radar resolution and snooping resistance.When a gps scrambler generates a sufficiently dense and persistent jamming signal, it occupies a large number of range and Doppler filtering units, reducing the radar's range and Doppler discrimination capabilities. It also increases the difficulty of signal monitoring and target resolution, and reduces the radar's anti-snooping and anti-stealth capabilities.
Threats to Doppler signal processing.Some advanced radar systems, such as air-based synthetic aperture radar (SAR), anti-missile and area air defense radar (AADR), widely use Doppler signal processing technology. jamming the jammer drone can effectively disrupt the workings of such systems, thereby significantly reducing their battlefield survivability.
In short, Doppler Jammer brings new serious challenges to military radar systems. It is necessary to study new anti-jamming and de-multiplexing techniques to improve the protection capability against such jamming and to maintain the normal operation and combat effectiveness of the radar system.
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