一种防范GPS定位导航攻击的无人机防御方法及系统
By acquiring and analyzing multiple signals from multiple sources, combining frequency band power spectrum and code phase delay detection, spoofing signals are identified and blocked. By switching to backup frequency bands and fusing navigation data, the problem of UAVs losing positioning control under complex attacks is solved, and safe flight of UAVs in complex scenarios is achieved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- LISHUI RES INST OF HANGZHOU UNIV OF ELECTRONIC SCI & TECH
- Filing Date
- 2026-05-18
- Publication Date
- 2026-07-17
AI Technical Summary
Existing technologies are insufficient to effectively defend against complex attacks, especially since it is difficult to distinguish between forwarded spoofing signals and real GPS signals. Furthermore, a single backup navigation switching strategy fails under simultaneous attacks from multiple interference sources, leading to uncontrolled drone positioning or equipment damage.
By acquiring and jointly analyzing multi-source signals, using frequency band power spectrum analysis and code phase delay detection to generate a set of interference type labels, combining dual-antenna receiving channels and power spectrum sidelobe ratio analysis to identify spoofing signals, and switching to backup frequency bands in cooperative interference scenarios, multi-source navigation data fusion is achieved, and navigation mode is restored step by step.
It achieves accurate identification of suppressive, deceptive, and coordinated interference, ensuring continuous and reliable positioning of UAVs in complex attack scenarios, reducing the false alarm rate, providing a basis for targeted defense strategy decisions, and recording attack logs to support optimized responses.
Smart Images
Figure CN122218741B_ABST