Analysis ionospheric effects on GPS satellite communication link

Ionosphere is a dispersive medium and the ionosphere dielectric is a random fluctuation. When electromagnetic wave propagates through the ionosphere, the phase, the arrival angle and the polarization of this wave would change. This change of phase path can make the signal phase change and it would be equal to the Doppler shifts and multipath delays. This document analyzes the ionosphere delay-Doppler scattering function and gets the ionosphere channel impulse response function. By using the impulse response function, we get the signal to noise radio (SNR) and analyze the error of the bits. The impulse response function also can be used to model the time-and-frequency-selective channel.