QUALCOMM Incorporated
SPS SPOOFING DETECTION

Abstract:

A method of detecting an anomalous SPS signal includes determining whether a first SPS signal is anomalous by determining: whether an actual SPS signal measurement difference is consistent with an expected measurement difference; whether a received power of the first SPS signal exceeds a maximum expected power; whether the first SPS signal originated from an SV location consistent with first SV location information; whether a first pseudorange to a first SV differs by more than a first pseudorange threshold from an expected pseudorange; that a first location, based on the first SPS signal measurement corresponds to at least one of an unexpected location or a high likelihood of anomaly location; whether one or more base station signal measurements are consistent with a first SPS signal measurement; and/or whether a measured signal quality of the first SPS signal is consistent with an expected signal quality.