The results of experiments on the Moscow – Ekaterinburg highway are discussed. The principal possibility of using broadband (150-600 kHz) HF signals for transmitting information and for studying the fine structure of the ionosphere in various heliogeophysical conditions is shown.
Keywords: broadband signal, ionosphere, fine structure, noise resistance, operational forecast, information transfer, multiple-beam structure, separation of signals, base frequencies, signal attenuation, long-term prediction
The article describes optimal mechanisms of wideband transmitter and receiver (150-600 kHz) for information transfer and for researching of thin structure of ionosphere in different helio-geophysical conditions. The proposed schemes give an opportunity to receiving with division of beams and to use the energy of all waves for increasing interference immunity.
Keywords: wideband, frequency of sounding, synchronization, antenna, reference generator, processor, band-pass filter, interference immunity, multipath propagation, phase, program