AntiGPS

Introduction to AntiGPS/AntiGNSS

GPS/GNSS jamming is mainly divided into two types: suppression jamming and spoofing jamming. Suppression jamming transmits strong interference signals, preventing the target device from receiving the correct GPS/GNSS signal, thus causing it to lose its positioning capability. Common suppression jamming methods include narrowband jamming, broadband jamming, continuous jamming, and pulse jamming.

Spoofing jamming, on the other hand, sends forged GPS/GNSS signals, causing the target device to receive incorrect location information, thus leading to incorrect positioning. Spoofing jamming is further divided into two types: autonomous spoofing jamming and relay spoofing jamming. Autonomous spoofing jamming does not rely on real GPS/GNSS signals but generates forged navigation signals and sends them to the target device. Relay spoofing jamming receives real GPS/GNSS signals, stores them, delays them, amplifies them, and then relays them.

GPS Positioning Principle

The GPS system transmits signals through satellites. The receiver receives signals from multiple satellites and calculates its own position. Specifically, the receiver calculates its own three-dimensional coordinates by measuring the signal propagation delay and combining it with the satellite coordinate information.

Implementation of Spoofing Jamming

The implementation of spoofing jamming requires the following steps:

Generate navigation signals: Based on the target position and ephemeris data, generate navigation signals that conform to GPS/GNSS standards.

Delay Calculation: Based on the target location and the relative positions of visible satellites, calculate the relative delay of each satellite signal and generate the corresponding timing signal.

Transmission Delay and Frequency Shift Correction: Correct the signal transmission delay and carrier frequency shift (Doppler shift) in a fixed Earth coordinate system.

Through these steps, GPS signals at any receiver location can be simulated, thus achieving deception.

Applications

In practical applications, deceptive jamming can be used to counter drones, simulate GPS/GNSS signals, etc. For example, by using a virtual GPS/GNSS signal, a drone can be misled into thinking it has entered a no-fly zone, thus automatically stopping.

The AG100 is a multi-functional navigation suppression and spoofing jamming signal generation device. It employs a more powerful computing platform and a reconfigurable and configurable architecture, enabling flexible configuration of simultaneous output navigation spoofing and suppression jamming signals. It supports full-band GPS/GNSS navigation suppression and spoofing jamming simulation. It boasts a rich variety of jamming patterns, supporting single-tone, frequency sweep, amplitude modulation, frequency modulation, pulse, white noise, digital modulation, and flicker jamming. It supports generative spoofing jamming simulation, featuring a built-in highly stable clock module that can be fully synchronized with the actual satellite navigation system for seamless spoofing. It can import spoofing trajectories in real time to deceive highly dynamic targets. The device is portable, compact, and easy to use, weighing less than 5kg (including battery), making it suitable for handheld or backpack-borne flexible and mobile navigation signal jamming applications.

Power Supply: DC12V or AC220V;

Operating Frequency Band: GPS, BeiDou, GLONASS;

Transmit Power: ≤3W;

Repulsion Distance: ≥1800m;

Repulsion Response Time: ≤5s;

Repulsion Angle: 360° horizontally; 90° vertically;

Effective Target Repulsion Capability: ≥4 units

Navigation Deception Distance: ≥1500m;

Operating Temperature: -40℃—70℃;

Protection Rating: ≥IP66;

Unattended Operation: 24-hour unattended defense capability