Exploitation of Pilot Signals for Blind Resilient Detection and Geo-Observable Estimation of Navigation Signals

Abstract

A method and apparatus resiliently despreads terrestrial navigation signals in which the spreading code duration is equal to an underlying baseband symbol rate, including ground beacons based on civil GNSS waveforms, and malicious spoofers. Symbol-synchronous channelizers exploiting the baseband symbol rate are provided, and means for blindly and resiliently detecting and determining geo-observables of those signals are described. The resulting invention can despread signals in arbitrary multipath, and subject to near-far interference in which the relative strength of the interferer is much higher than the despreading gain of the receiver, including near-far tonal and narrowband co-channel interference.

Dependencies are inferred from the claim text.