Advanced signal processing scheme for GNSS receivers under ionospheric scintillation

Abstract

This paper presents an adaptive Kalman filter approach to track scintillating GNSS signals based on the empirical knowledge on the signal-to-noise ratio. The adaptive scheme to adjust the Kalman filter gain, changing in time-varying optimal manner for different C/N <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">0</sub> to have different equivalent noise bandwidths, is employed to track the signal in deep amplitude fades under strong ionospheric scintillations.