SINGULARITIES OF FREQUENCY DISPERSION IN BROADBAND IONOSPHERIC HIGH-FREQUENCY RADIO CHANNELS
The hypothetical models of the frequency dispersion of phase incursion in case when the ionosphere of the Earth is the propagation medium of electromagnetic oscillation are presented. Its three components are singled out, two of them are regular functions, the third is a stochastic one. By a computing experiment method the influence of the components on the distortion of pulse response of ionospheric HF-channels with a band 0,3; 0,5; 0,8 and 1 MHz and various medium frequencies is investigated.