The ionosphere has been the most challenging source of error to mitigate within the
community of global navigation satellite system (GNSS)-based safety-critical systems. Users …

Ionospheric scintillation is the physical phenomena affecting radio waves coming from the
space through the ionosphere. Such disturbance is caused by ionospheric electron-density …

Ionospheric scintillations are one of the earliest known effects of space weather. Caused by
ionization density irregularities, scintillating signals change phase unexpectedly and vary …

A receiver-autonomous non-cryptographic civil GPS antispoofing technique called the
vestigial signal defense (VSD) is defined and evaluated. This technique monitors distortions …

A characterization is given for the behavior of Global Positioning System phase tracking
loops in the presence of severe equatorial ionospheric scintillation. The purpose of this work …

A simple model is proposed for simulating equatorial transionospheric radio wave
scintillation. The model can be used to test Global Positioning System phase tracking loops …

Global navigation satellite systems (GNSS) underpin a number of modern life activities,
including applications demanding positioning accuracy at the level of centimetres, such as …

Abstract Global Positioning System (GPS) receiver positioning capabilities are being
challenged by increasing requirements on positioning and navigation under environments …

In most wired and wireless systems, carrier tracking is an essential task that allows the
receiver to precisely synchronize with the carrier of the incoming signal. Stringent carrier …

Test procedures are developed for characterizing the response of civil GPS receivers to
spoofing attacks. Two response characteristics are analyzed in detail for four representative …