Jamming Mitigation Based on Improved GNSS/UWB Tightly-Coupled Integration

Global Navigation Satellite System (GNSS) has been recognized as a crucial information technology for Location-Based Services (LBS) in various fields. However, GNSS is inherently vulnerable to intentional or unintentional Radio Frequency Interference (RFI). Therefore, safety concerns of LBS using GNSS as the main positioning method, especially when suffering from RFI, should be a primary focus. The RFI may severely degrade the performance of GNSS, or even cause the failure of the receiver’s ability to extract measurements. It is of great significance to mitigate the impacts of interference for the safety-critical applications. This work aims at exploiting Ultra-Wide Band (UWB) as aiding information from the integration stage to improve the performance when GNSS suffering from interference. The ranging measurement from UWB anchors can serve as the aiding information to provide positioning information. Due to its operation in the higher frequency band up to several GHz, which is entirely separate from the GNSS frequency bands, thereby ensuring it is immune from GNSS interference. This research develops an improved positioning solution based on the Tightly-coupling (TC) of GNSS and UWB. Based on the field UWB data and a GNSS jamming experimental platform, a half-simulated experimental platform for GNSS and UWB integration under GNSS jamming conditions is established. Test Results under the chirp-jamming scenarios are evaluated to demonstrate the necessity and superiority of the proposed solution.