Zhurnal Radioelektroniki - Journal of Radio Electronics. eISSN 1684-1719. 2022. №10
ContentsFull text in Russian (pdf)
DOI: https://doi.org/10.30898/1684-1719.2022.10.2
COMPENSATION OF SIGNAL DISTORTION DURING PROPAGATION
OVER TRANSIONOSPHERIC RADIO LINES
USING THE GLOBAL MODEL OF THE EARTH’s IONOSPHERe
L.E. Nazarov
Kotelnikov IRE RAS, Fryazino branch
141120, Russia, Fryazino, pl. Vvedenskogo, 1
The paper was received August 29, 2022.
Abstract. A description is given of distortions of complex envelopes of digital signals during their propagation along transionospheric channels, the effect of which is equivalent to linear filtering. It is shown that signal distortions due to the dispersion properties of the earth's ionosphere cause the occurrence of interference noise which reduces the reliability of information transmission. It is noted that the effect of digital signal processing methods at reception, which reduce the distorting effect of interference is to form a linear filter with an inverse transmission coefficient relative to the transionospheric channels. A method for forming the inverse filter using the global model of the earth's ionosphere Klobuchar, developed and intensively used in the GPS satellite navigation system to improve the accuracy of navigation measurements is considered. A detailed description of this method is given, which is based on estimating the total electron content of a transionospheric channels using the considered Klobuchar model. Limitations in the application of the method under consideration are determined.
Key words: transionospheric channels, distortions of digital signals, Klobuchar model, interference noise, reducing noise.
Financing: This study was supported by the Russian Foundation for Basic Research, project 20-07-00525.
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For citation:
Nazarov L.E. Compensation of signal distortion during propagation over transionospheric radio lines using the global model of the earth’s ionosphere. Zhurnal radioelektroniki [Journal of Radio Electronics] [online]. 2022. №10. https://doi.org/10.30898/1684-1719.2022.10.2 (In Russian)