System of frequency providing of HF communication channels based on the new digital sounder on USRP platform

Studied the possibility of creating on USRP platform receiving terminal Ionosonde continuous chirp signal and to obtain compared results with the data of ionospheric sounding analog chirped probe. Created on USRP platform receiving terminal chirp ionosonde showed a higher noise immunity, lack of congestion own signal, the possibility of simultaneous studies of the characteristics of direct and global propagation. Developed an algorithm providing frequency HF communication systems based on panoramic radio sensing using a device sold by technology SDR. As a result of experiments conducted on the radio a length of about 3000 km is established that the application of the developed approaches in the trunk radio enhances the probability of error-free reception of test messages from 54% to 84% of cases in the daytime and from 46% to 90% at night. The first values correspond to the case selection OWC by long-term prognosis. Selecting the OWC as a result of sensing link can significantly reduce the power of the connected signal. In the experiments quite often there have been cases where the choice of OWC using the SDR Ionosonde communication system operating signal power 5W had reliability of communication at the level of 97%. The experimental results showed that during tests of various radio technical systems HF band monitoring of ionospheric radio links using chirp probes allows about 10 times to reduce their terms, as well as improve the reliability and informative test results. Thus, this Ionosonde is a modern tool for providing frequency HF communication systems probed the link.