Method of detecting signals designed for deceiving a signal receiver of a satellite navigation system receiver and corresponding receiver

摘要

The method involves calculating a position of a satellite (1) in a trihedral geographical room reference frame centered on a receiver. An attitude of an antenna is determined (2) in the reference frame. An elevation and azimuthal angle of the satellite is calculated (3) on the frame. Another elevation and azimuthal angle of the satellite is determined (4) in another reference frame. A value of a likelihood function between the elevation and azimuthal angles is calculated (5). A risk of receiving decoy signals is detected (6) when the value of the likelihood function is lower than a threshold. An independent claim is also included for a signal receiver.