Multi-UAV Cooperative Anti-Jamming for GNSS Signals Based on Frequency-Domain Power Inversion

Unmanned aerial vehicles (UAVs) have gained significant popularity in both military and civilian sectors due to their maneuverability and versatility. However, their reliance on global navigation satellite systems (GNSSs) for real-time and precise navigation makes them vulnerable to interference, particularly in hostile jamming environments. In this article, we present a novel approach to address the challenges posed by GNSS jamming in UAVs navigation. Unlike traditional multisensor fusion techniques, our method focuses on physically combining signals from multiple homogeneous sensors, extending centralized multiantenna anti-jamming techniques to cooperative distributed scenarios. This approach leverages frequency conversion and forwarding to bypass GNSS navigation band, enabling signal aggregation. Using multiple UAVs, it enhances system resilience and spatial degrees of freedom (DoFs), achieving both anti-jamming and collaborative navigation objectives simultaneously. Theoretical analysis demonstrates the feasibility and potential of this technique in ensuring precise and secure UAV operations in GNSS-jamming environments.