SPACE-TIME MULTI-ANTENNA AND MULTI-CORRELATOR DEVICE FOR REJECTING MULTI-PATHS IN NAVIGATION SYSTEMS

摘要

The invention relates to a location device capable of discriminating a useful signal from multi-path signals. The device comprises at least two radiolocation-signal sensors (A1, A2) and signal-processing means (µ?) capable of implementing an algorithm for estimating a maximum likelihood, each of said sensors (A1, A2) being connected to at least two signal-processing lines, each processing line including a correlator (C11, C12) and being arranged such that the signal-processing means (µ?) can calculate parameters representative of the useful signal and of the multi-path signals from the signals from the processing lines. The processing lines include at least one delay line (R11m) connected, at a first end thereof, to the output of the correlator (C11), and, at the second end thereof, to an input of the signal-processing means (µ?), the inserted delay corresponding to a multiple of the integration time of the correlators. The invention can be used in reference ground stations or ground stations for observing navigation-satellite constellations, and can be used in mobile terminals for improving the navigation solution in urban or even airport environments.