Experimental Study of Phase-Frequency Responses of HF Radio Channels with the Use of SDR Ionosonde

Paper presents a new method of studying phase-frequency response (PFR) of a wideband HF channel. There are presented experimental PFR measured with the use of SDR ionosonde of Volga state university of technology. They allowed to estimate spreading (group delay dispersion) of wideband channel impulse responses due to dispersion. With the use of the proposed approach to the estimation of the phase measurement errors we obtained the experimental values of that errors.