Brief description of the detection of signals intended to mislead a receiver of signals of a system of satellite navigation and receiver associated.

摘要

Method of detecting signals intended to mislead a receiver of signals of a satellite navigation system, the receiver being provided with an antenna with sensors to radiation, comprising the following steps, for each satellite: - (1) to calculate the position of the satellite in a first reference mark tgl centered on the receiver from the position of the receiver and the position of the satellite; - determine (2) the attitude of the antenna in the first reference mark; - calculate (3) of the first elevation and azimuth angles of the satellite in a second reference frame tied to the antenna, from the position of the satellite in the first reference mark and the attitude of the antenna in the first reference mark; - determine (4) of the second elevation and azimuth angles of the satellite in the second reference frame, by iterative search for a maximum of a complex weighted sum of the demodulated signals received by the antenna; - calculate (5) the value of a function of likelihood between the first elevation and azimuth angles of the satellite and the second elevation and azimuth angles of the satellite; and (6) - detect a risk of reception of signals deluded when the value of the probability function is less than a threshold.