The Method of Receiver-Spoofer Signal Mitigation Based on Multi-correlator

• DOI: 10.33012/2017.15108
• Publication Date: 2018-12-11T17:11:25Z
• Authors: Zhou Meng; Ma Tianyi; Li Hong; Lu Mingquan; Zhu Hongyu
• Keywords: Spoofing attack; Discriminator; SIGNAL (programming language); False alarm

Receiver-Spoofer (RS) is a means of Global Navigation Satellite System (GNSS) spoofing that the least likely to be found at present. It can accomplish process without interrupting receiver tracking state. The required signal ratio very low, so it difficult detected in terms anomaly power detection and other traditional anti-spoofing methods. However, RS will cause distortion code loop after entering receiver. By using this feature, trace method based on Ratio Metric effectively detect RS, but may mistake multipath for signal. multi-correlator reduce false alarm probability by adding pair correlators loop. Although optimized give an when works, still captured signal, pseudo range from spoofed channel cannot used positioning calculation. To mitigate impact loop, work, mitigation proposed. Specifically, additional observations provided extra correlator aforementioned method. increment observed amount, error phase discriminator (caused signal) calculated. Using as correction equation, locked authentic not affected Finally, validation verified via series simulation experiments.