Studying the parameters of frequency dispersion for radio links of different length using SDR based sounding system

Abstract

Methods and software were developed for studying parameters of frequency dispersion for radio links of different length. We used SDR based sounding system for studying a HF radio channel and determining parameters of frequency dispersion. The software component was implemented using licensed software Lab VIEW. The hardware component was implemented using a programmable transceiver USRP N210. We studied the parameters of broadband radio channels (up to 1 MHz) for near-vertical incidence skywave (NVIS) radio path (up to 500 km), as well as the parameters of the regular component of the third order phase dispersion for long-distance radio path (1000–3500 km). We studied parameters of frequency dispersion depending on the time of day, path length as well as the central channel frequency.