Selecting Optimal Anti-Spoofing and Anti-Jamming Techniques for ...

Short-Term Jamming
Examples:

• Passing car with low-power GNSS jammer
• Powerful jamming from automatic anti-drone system

Inertial Navigation System (INS): Combines inertial measurements with a GNSS receiver to maintain navigation continuity and stability during short-term interference. Utilize inertial data to quickly exit the jamming zone. Rubidium Reference Oscillator: Provides a stable clock source to maintain time accuracy during brief GNSS jamming periods.
Cesium Atomic Clock: Offers exceptional long-term stability and accuracy, maintaining high-precision time synchronization during prolonged periods of long-term jamming.
Time Transmission Protocols:

• PTP (Precision Time Protocol): Provides highly accurate time synchronization over Ethernet networks, offering resilience against jamming by relying on network-based time sources instead of GNSS signals.
• WhiteRabbit: Combines sub-nanosecond accuracy with Ethernet-based communication to provide an alternative time source independent of GNSS, ensuring precise time synchronization during jamming incidents.

Alternative Navigation Systems: Loran-E and LEO Constellations

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• Loran-E:
  • Offers a reliable, low-frequency navigation system that operates independently of GNSS, providing a robust alternative for time synchronization.
  • By leveraging ground-based transmitters, Loran-E ensures continuous timing accuracy and resilience against jamming by utilizing highly stable, long-range signals.
• LEO Constellations:
  • Low Earth Orbit (LEO) satellite constellations like Starlink, OneWeb, Orbcomm, and Iridium provide accurate timing through signals of opportunity, offering a strong alternative when GNSS signals are unavailable.
  • These constellations deliver resilient and precise timing services by:
    • Higher Signal Strength: Their proximity to Earth provides stronger signals that can reach challenging environments like urban canyons and polar regions.
    • Novel Frequencies and Geometry: Transmission on novel frequencies enhances resilience against jamming, and the unique geometry improves availability.
    • Combining with GNSS Systems: They work alongside GNSS (e.g., Galileo) to provide exceptional resilience, ensuring continuous timing services even in contested environments.

Non-Coherent, Short-Term Spoofing
Example: Automatic anti-drone system with spoofing GNSS Receiver + INS: Combination of GNSS receiver with basic spoofing detection algorithm and inertial system. Possible algorithms for detecting non-coherent spoofing: anomalies in GNSS signals such as jumps in coordinates that are inconsistent with INS data. Basic Spoofing Detection Algorithms + Stable Reference Oscillator:
Combination of basic spoofing detection techniques and a Rubidium Reference Oscillator or Cesium Atomic Clock.

• Detection Algorithms:
  • Detect time inconsistencies between GNSS receiver and alternative sources.
  • Identify anomalies in raw GNSS data.

Problem We Solve

Threats Against GNSS Receiver Technology

Military bases, government facilities, and other fixed-site locations need a way to protect against the threat of signal jamming and spoofing. Because GNSS signals are relatively weak once they reach the surface of the Earth, they can be easily manipulated. Adversaries can turn low-cost SDRs into GPS jammers and spoofers. They then can turn around and use those devices to disrupt operations and emit fake satellite signals.

Defense agencies – whether operating on land, air, or sea – need ways to detect and mitigate these satellite signal threats in order to ensure the continued operation of mission-critical equipment, such as radar, communications, missile defense and more.

A solution to jamming and spoofing can range from anti-jam antennas and add-on devices, to GPS threat detection sensors and even embedded software that protects critical infrastructure.

Why it is Important

Navigation warfare – and more broadly, electronic warfare – is becoming an increasing threat on the 21st century battlefield. Soldiers and command and control centers rely on essential GNSS signals for communication, weapon defense systems, and knowledge on the ground. Sometimes these signals can be compromised in 2 ways:

• An adversary blocks the ability of the warfighter to use satellite signals for their equipment, thus causing a loss of communications and radar.
• An adversary leverages the GNSS signals to learn something about the warfighter, and their location or movement.

To be effective and ensure the safety of personnel, military leaders need to reliably and efficiently detect GNSS Signal threats and mitigate them in real time.

How We Solve it

Securing GNSS Signals Against Jamming and Spoofing

Depending on the type of application, there are (4) main products that ensure that your mission-critical equipment does not get compromised by signal interference.

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BroadSense

If you have a system that relies on GPS satellite signals and you need a way to real-time situational awareness data, the BroadSense sensor can detect when the GPS receiver’s signal or GPS spectrum is compromised. It provides real-time signal threats through a convenient visual data output screen. And its small form factor (41 x 41 x 19mm) enables you to easily install it with an already built out system.

Applications of GPS Jamming & Spoofing Detection Sensor:

• UAV platforms
• Dismounted Warfighters
• Cell Towers
• Any environment that is contested (i.e. potential adversarial threats).

BroadShield

If you have a timing device or any other electronic equipment that relies on GNSS signals inside a mission-critical datacenter, you can install BroadShield software to detect jamming and spoofing. BroadShield’s patented algorithms immediately report disruptions to the user interface and can also mitigate the GNSS interference and/or fake satellite signals.

Applications For Anti-Jam & Anti-Spoofing Software:

• Radar
• Communications
• Timing Servers
• Datacenters

Anti-Jam Antennas

Sometimes the most straight-forward solution is the best. The AJ GPS/GNSS Anti-Jam Outdoor Antenna is a high gain (40 dB) GNSS outdoor antenna. The Anti-Jam antenna rejects signals for the lower-elevation angles – where most of the interference comes from. It uses a 3-stage low noise amplifier, a mid-section SAW, and a tight pre filter to protect against saturation by high level sub-harmonics and L-band signals.

GPSdome Anti-Jammer

The GPSdome Anti-Jammer ensures continuity of autonomous navigation and operation during GNSS jamming conditions. Its small form factor is ideal for mobile and or UAV applications. With GPSdome’s protection, any military system immediately becomes more robust and protected against wireless attacks.

If you want to learn more, please visit our website GNSS jamming and spoofing probe.

Why Choose Us