Carrier phase double-difference GNSS spoofing detection technology based on generalized likelihood ratio

GNSS Spoofing Detection and Mitigation Based on Maximum Likelihood Estimation

Spoofing attacks are threatening the global navigation satellite system (GNSS). The maximum likelihood estimation (MLE)-based positioning technique is a direct positioning method originally developed for multipath rejection and weak signal processing. We find this method also has a potential ability for GNSS anti-spoofing since a spoofing attack that misleads the positioning and timing result w...

GNSS Spoofing Detection using Two-Antenna Differential Carrier Phase

A method is developed to detect GNSS spoofing by processing beat carrier-phase measurements from a pair of antennas in a CDGPS-type calculation. This system Copyright © 2014 by Mark L. Psiaki, Brady W. O'Hanlon, Steven P. Powell, Jahshan A. Bhatti, Kyle D. Wesson, Todd E. Humphreys, & Andrew Schofield. All rights reserved. Preprint from ION GNSS+ 2014 detects spoofing attacks that are resistant...

GNSS Carrier Phase-Based Attitude Determination

The GNSS (Global Navigation Satellite Systems) are a valid aid in support of the aeronautic science. GNSS technology has been successfully implemented in aircraft design, in order to provide accurate position, velocity and heading estimations. Although it does not yet comply with aviation integrity requirements, GNSS-based aircraft navigation is one of the alternative means to traditional dead-...

An Improved Automatic EEG Signal Segmentation Method based on Generalized Likelihood Ratio

It is often needed to label electroencephalogram (EEG) signals by segments of similar characteristics that are particularly meaningful to clinicians and for assessment by neurophysiologists. Within each segment, the signals are considered statistically stationary, usually with similar characteristics such as amplitude and/or frequency. In order to detect the segments boundaries of a signal, we ...

Generalized Likelihood Ratio Statistics