Simulation of Four- Directional Spoofing Suppression with Five-Elements Antenna Array

In this paper, a method and algorithm to solve the task of GNSS spoofing suppression with a five-element antenna array from four directions are presented. Initial data is experimental observations of 33 satellites (GPS, GLONASS, GALILEO, BEIDOU, QZSS). It is shown that with the simultaneous suppression of interference from four sources, 11 to 20 satellites out of 33 remain available to solve the navigation problem. Interference suppression is provided within the limits −65-78 dB and low position dilution of precision (PDOP). The results of the research are illustrated with satellite distribution (visibility) diagrams. The diagrams show the satellites that remain after the spoofing suppression procedure. The projections of the antenna array pattern on the plane of the aperture are given with an indication of interference sources positions.