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GNSS Jamming: How to test the risks to safety-critical and liability-critical systems

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Sim3D is an innovative 3D modelling system that creates a realistic environment for the testing of multipath and obscuration effects.

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Blog - Simulating GNSS multipath and obscuration effects on connected and autonomous vehicles

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SimGEN, when combined with a compatible Spirent GNSS signal generator system, can be used to stimulate a satellite navigation receiver system in a laboratory environment.

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The GSS7000 Series of Multi-GNSS, Multi-frequency Simulators from Spirent offers simultaneous coherent GPS, GLONASS, BeiDou, Galileo, QZSS, NavIC (IRNSS), and SBAS signals from a single test scenario. Up to 256 channels provides ample signals for a wide range of development, integration and verification tasks.

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The SimINERTIAL system emulates inertial sensor outputs while concurrently simulating GPS RF signals, thereby enabling controlled, repeatable testing of integrated GPS and inertial units.

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The Spirent GSS9000 Multi-Frequency, Multi-GNSS RF Constellation Simulator sets a new standard of excellence in GNSS RF Simulation for R&D and performance test. It produces a comprehensive range of emulated multi-GNSS, multi-frequency RF signals with ultimate class-leading flexibility, coherence, fidelity, performance, accuracy and reliability. 

GSS9000 Multi-Frequency, Multi-GNSS RF Constellation Simulator

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The GSS7000 enables precise positioning, such as required for in-car navigation systems

The GSS9000 produces a comprehensive range of emulated multi-GNSS, multi-frequency RF signals with ultimate class-leading flexibility, coherence, fidelity, performance, accuracy and reliability. 

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The GSS7000 Series of Multi-GNSS, Multi-frequency Simulators from Spirent offers simultaneous coherent GPS, GLONASS, BeiDou, Galileo, QZSS, NavIC (IRNSS), and SBAS signals from a single test scenario. 

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The Spirent GSS9000 Multi-Frequency, Multi-GNSS RF Constellation Simulator sets a new standard of excellence in GNSS RF Simulation for R&D and performance test.

Precision multi-frequency, multi-GNSS simulation.

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Truly accurate testing

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When complete, Galileo, Europe’s Global Navigation Satellite System (GNSS), will join GPS, GLONASS and other upcoming systems in providing positioning services to users across world. As part of the development of the Galileo system, Thales Alenia Space used Spirent GNSS simulation to rigorously test all aspects of the GNSS, both in isolation and together.

Case Study: The Path to Full Operational Capacity—Testing ESA’s Galileo

The Path to Full Operational Capacity—Testing ESA’s Galileo

Learn more about the functionality technical data, and configuration information of the GSS9000 Series.

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Connected autonomous vehicle developers must understand the impact of multipath and obscuration on the GNSS receiver. Spirent explores the need for 3D simulation.

Simulating GNSS multipath and obscuration effects on connected and autonomous vehicles

Developers of connected autonomous vehicles must understand the impact of multipath and obscuration on the GNSS receiver. This blog explores the need for 3D simulation in the research lab. 

For Spirent solutions help NTT and Furuno develop pioneering multipath mitigation algorithm for GNSS timing receivers

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Learn how Sim3D multipath simulation software could benefit your business.

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More industries are using CubeSats for communications and data services, with many containing GPS/GNSS receivers for orbit determination and timekeeping.

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Seamless integration

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This datasheet describes the functionality, and provides technical data and configuration information, of the GSS7000 multi-frequency multi-GNSS RF simulation solution.

Technical data and configuration information, of the GSS7000 multi-frequency multi-GNSS RF simulation solution.

GSS7000 Specification

SimGEN is the most powerful and intuitive simulation software used to develop high performance products.

With full control and a comprehensive feature set, Spirent SimGEN is the most powerful and intuitive PNT simulation control software available. Find out more. 

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SimGEN is the most powerful and intuitive simulation software available

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There are multiple satellite signal testing options available for developers of GNSS-enabled devices, but not all of them deliver the breadth and accuracy of results that you need. So how do you decide which GNSS testing device is right for you?



Choosing a GNSS simulator - free eBook

Choosing a GNSS simulator

Learn how our solutions for GNSS receiver testing could benefit your business.

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It’s widely accepted that simulation is the primary tool for testing GNSS enabled equipment. However, selecting the right simulator is not simple. The first port of call should be to check the feature list – does the simulator offer the functionality you require? After this, though, you will need to establish whether the simulator performs as expected. Failure to do so could have catastrophic consequences for your product, and even your business.

This eBook takes a look at some of the important performance characteristics that you need to consider, and that can make the difference between success and failure.

How to choose a GNSS simulator

Find the GNSS simulator that's right for you

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Feature-rich GNSS simulator that grows with your needs

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Protect your receiver against harmful multipath and obscuration

A 5G network architecture typically requires primary reference time clocks (essentially GNSS receivers) to be installed near clusters of short-range base stations. Many clocks will be installed at street level in built-up areas, rather than on top of towers or tall buildings as has been the case with 4G. Multipath signals abound in such locations, while the narrow view of the sky often limits the number of line-of-sight satellite signals available. Both issues can severely affect a receiver’s ability to maintain accurate time, to the point where network quality of service can be seriously impacted.



Modern cellular networks need accurate time signals from GNSS satellites to keep transmission in sync. With Spirent’s help, NTT and Furuno have developed an algorithm for GNSS timing receivers that eliminates the effects of multipath, dramatically improvi

Spirent solutions help NTT and Furuno develop pioneering multipath mitigation algorithm for GNSS timing receivers

Spirent solutions help NTT & Furuno develop pioneering multipath mitigation algorithm

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Integrating Spirent’s GSS7000 with SimHIL enabled Italdesign to improve and accelerate their testing of autonomous vehicles.

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Learn how our GSS7000 GNSS simulator could benefit your business.

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Build detailed 3D environments with proven realism for advanced multipath and obscuration testing.

Spirent's Sim3D software enables the simulation of realistic 3D environments for testing the effects of multipath and obscuration on GNSS receivers. Read more.

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Build realistic 3D environments for multipath and obscuration testing

Sim3D Multipath Simulation Software

The most powerful and flexible simulation control software available

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The GSS9000 Series offers the very best in performance, flexibility, and capability to GNSS developers, delivering maximum performance without compromise.

Spirent’s GSS9000 Series is a multi-frequency, multi-GNSS RF constellation simulator which delivers maximum performance without compromise. Find out more.

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Delivering precision multi-frequency, multi-GNSS simulation

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As more and more systems come to rely on accurate positioning, the threat of GNSS jamming is growing significantly. Understanding how jamming affects systems and the methodologies available to help mitigate that threat is extremely important for developers of safety- and mission-critical systems.



As more and more systems come to rely on accurate positioning, the threat of GNSS jamming is growing significantly.

GNSS Jamming Whitepaper

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Developers of connected and autonomous vehicles must assess how well the vehicle’s antenna receives GNSS signals – and that requires over-the-air testing. 

Testing GNSS antennas in connected and autonomous vehicles: Simulating RF signals over the air

Developers of connected and autonomous vehicles must assess how well the vehicle’s antenna receives GNSS signals – and that requires over-the-air testing. This blog looks at the implications.

Professor Shen Yafei

GSS7000 GNSS Simulator

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Spirent’s SimGEN is built on decades of experience, delivering power, flexibility, and intuitive ease-of-use. Find out more about performance upgrades and new releases.

Continuous improvement with Spirent

Spirent’s SimGEN is built on decades of experience, delivering power, flexibility, and intuitive ease-of-use. Spirent is dedicated to improving and broadening the performance of our flagship simulation control platform.