Studying the Effect of Chirping of the Impulse Response of an Ultra-wideband Ionospheric HF Channel under the Influence of Intramode Frequency Dispersion

Abstract

there is presented the findings of theoretical studies into the impulse response (IR) chirping and analysis of the conditions when IR has the form of a chirplet during ionospheric HF propagation. Based on the international reference ionosphere (IRI) model, we carried out modeling of possible parameters of chirplets with a rectangular and a Gaussian window. Characteristics of chirplets were additionally studied in the frequency range where the change of type of intramode dispersion of the ionospheric plasma occurs.