Satellite Navigation Spoofing Interference Detection and Direction Finding Based on Array Antenna

Area of Science:

• Navigation Systems Engineering
• Signal Processing
• Antenna Array Design

Background:

• Satellite navigation signals are weak and susceptible to spoofing interference, which can compromise receiver accuracy.
• Detecting and identifying spoofing interference is critical for the safe operation of Global Navigation Satellite System (GNSS).

Purpose of the Study:

• To develop a novel method for the rapid and accurate detection and identification of satellite navigation spoofing interference sources.
• To enhance the security and reliability of GNSS by improving spoofing interference monitoring capabilities.

Main Methods:

• Proposed a six-array spoofing-interference-monitoring antenna array.
• Employed monitoring of relevant signal peaks combined with an airspace-trapping algorithm for detection and identification.
• Utilized long- and short-baseline algorithms to resolve circumferential ambiguity for high-precision source localization.

Main Results:

• The proposed array antenna successfully detected and identified spoofing interference sources.
• Achieved high-precision localization of spoofing interference sources by resolving circumferential ambiguity.
• Outdoor experiments demonstrated directional accuracy within 2° for spoofing interference signals.

Conclusions:

• The novel six-array antenna system offers a high-precision direction-finding capability for spoofing interference.
• This method significantly improves the ability to quickly and accurately identify spoofing threats to GNSS.
• The findings contribute to enhancing the security and integrity of satellite navigation systems.