Vertical Sounding of Ionospheric Radio Channels by Multicarrier Phase-Shift Keying Signals

Methods of digital synthesis and processing of multicarrier signals with a spread spectrum due to BPSK intrapulse modulation have been developed. There is discussed the features of the application of the Fourier transform to solve the problem of synthesizing a multicarrier signal with its subsequent division into separate subcarriers at reception. The findings of experimental verification of the developed approaches are presented. The proofs of their reliability and advantages in vertical sounding of the ionosphere are shown.