Optimum Array Processing with Unknown Attitude Parameters for GNSS Anti-Spoofing Integrity Monitoring

Antenna array (AA) processing is considered for global navigation satellite system (GNSS) integrity monitoring under the influence of a false navigation signals source (FNSS). In accordance with generalized likelihood ratio test, an optimal decision-making algorithm is synthesized regardless of the presence or absence of FNSS signals. The algorithm assumes spatial-temporal adaptive processing for lack of a priori information about both FNSS location and antenna array (AA) attitude parameters. The algorithm operability characteristics were obtained using small-sized navigation objects (such as drones) with a three-element antenna array. The results are valid for any kind of GNSS with both frequency (GLONASS) and code division multiple access techniques (GPS, Galileo, etc.).