Roadside GNSS Jammer Detection via Signal Analysis
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Solution Overview
Problem
Personal GNSS jammers used by motorists and drivers interfere with satellite navigation systems and ground-based augmentation systems, posing a risk, especially in sensitive locations like airports and stations, and existing solutions are complex to implement in mobile receivers.
Innovation Solution
A system integrated with roadside vehicle speed camera posts that detects GNSS jammers by analyzing satellite navigation signal characteristics and triggers image capture of interfering vehicles, using existing infrastructure to identify and locate jamming sources.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If personal GNSS jammers are used to inhibit vehicle geolocation outside work hours, then driver privacy and freedom are improved, but interference with satellite navigation systems and ground-based augmentation systems occurs, posing risks especially in sensitive locations
Solution Approach 1:
The system detects the harmful jamming signals and uses them to identify offending vehicles through roadside speed camera posts, converting the harmful interference into a beneficial detection mechanism that enforces regulations while allowing legitimate private use elsewhere
2Reliability
If anti-jamming or jammer detection measures are incorporated within all GNSS receivers for road use, then jammer detection capability is improved, but implementational complexity on mobile receivers increases substantially
Solution Approach 1:
The patent introduces roadside speed camera posts as intermediary detection devices that perform jammer detection functions, thereby relieving mobile receivers from the complexity of implementing anti-jamming measures while maintaining detection capability through a centralized infrastructure
3Device complexity
If roadside speed camera posts are used to detect GNSS jammers, then detection infrastructure complexity is reduced by using existing infrastructure, but detection coverage and accuracy may be limited by camera post locations
Solution Approach 1:
The system makes existing speed camera posts multi-functional by integrating jammer detection capabilities into their existing infrastructure, allowing them to perform both speed enforcement and jammer detection functions, thereby reducing overall infrastructure complexity while expanding detection capabilities
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Effectively identifies and locates vehicles using personal GNSS jammers without requiring new infrastructure, ensuring accurate detection and minimal interference with sensitive location systems, particularly relevant for future self-driving car deployments.
Implementation Method 1
a first device for receiving a satellite radionavigation signal; the first device being configured to receive, via a radio link, a sequence of a satellite radionavigation signal received by a vehicle and retransmitted by said vehicle to the system via the radio link
Implementation Method 2
a second device that is configured to measure at least one characteristic of a received satellite radionavigation signal and to detect, on the basis of said at least one characteristic, interference in said satellite radionavigation signal caused by a jamming signal
Implementation Method 3
a third device for triggering the capture of an image of the road if said satellite radionavigation signal is subject to interference caused by a jamming signal
Data Source
AI summary
A system for detecting GNSS signal jammers to be positioned on a roadside, the system comprises: a first device for receiving a GNSS signal; a second device that is configured to measure at least one characteristic of a received GNSS signal and to detect, on the basis of at least one characteristic, interference in the GNSS signal caused by a jamming signal; a third device for triggering the capture of an image of the road if the GNSS signal is subject to interference caused by a jamming signal, the first device configured to receive, via a radio link, a sequence of a satellite radionavigation signal received by a vehicle and retransmitted by the vehicle to the system via the radio link.