METHOD OF DETECTING INTERFERENCE IN A SATELLITE RADIO-NAVIGATION SIGNAL

摘要

Method of detecting interference in a satellite radio-navigation signal, characterized in that it comprises the following steps:
determining a first temporal position for which the correlation between the said signal and a local spreading code, offset by the said position, is maximum;determining a plurality of measurements of correlation between the said signal and a local spreading code offset by a plurality of secondary temporal positions, the said plurality of secondary temporal positions and the said first temporal position being regularly spaced;determining, for a plurality of correlation measurement pairs formed by two measurements at two consecutive temporal positions, the phase difference between the two correlation measurements of the said pair;calculating an item of information representative of the standard deviation of the said phase difference; andcomparing the said item of information with a detection threshold configured at least as a function of the ratio of the powers of the signal and of the interference.

主权项

1. Method for detecting interference in a satellite radio-navigation signal, comprising the steps of:
determining a first temporal position for which the correlation between a local spreading code and the said signal, offset by the said position, is maximum; determining a plurality of measurements of correlation between the said local spreading code and the said signal offset by a plurality of secondary temporal positions, the said plurality of secondary temporal positions and the said first temporal position being regularly spaced; determining, for a plurality of different correlation measurement pairs formed by two measurements at two consecutive temporal positions, the phase difference between the two correlation measurements of the said pair; calculating an item of information representative of the standard deviation of the said phase difference; and comparing the said item of information with a detection threshold configured at least as a function of the ratio of the powers of the signal and of the interference.