Estimation of the transfer ratio frequency characteristic of HF radio channel by using the LFM signal
DOI:
https://doi.org/10.3103/S073527271012006XKeywords:
amplitude-frequency characteristic, ionosphere, linear-frequency modulation ionosonde, chirp-ionosonde, group delay time, radio channel, noiseAbstract
A technique for determining the transfer ratio frequency relationship of a short-wave ionospheric radio channel with high resolution has been considered using the continuous linear-frequency-modulated signal. This technique is based on the filtering of modes of ionospheric propagation at the receiver output following the compression method processing in the frequency domain. The estimates of measurement errors were also presented.
References
V. A. Ivanov, N. V. Ryabova, V. P. Uryadov, and V. V. Shumaev, “Frequency Allotment Equipment in the Adaptive System of HF Radio Communications,” Elektrosvyaz’, No. 11, 30 (1995).
G. G. Vertogradov, V. P. Uryadov, and E. G. Vertogradova, “Hardware-Software Complex Designed for Determining the Optimal Working Frequencies of Communication Radio Link Based on Data of Oblique Probing of Ionosphere,” in Proc. 13th Int. Sci.-Tech. Conf. “Radiolocation, Navigation, Communications” (RLNC’2007), 2007, Voronezh, Russia (Voronezh, 2007), Vol. 2, pp. 1203–1215.
A. A. Kolchev and A. O. Shiriy, “Reconstruction of the frequency dependence of the complex reflection coefficient from data of the oblique LFM ionosonde,” Atmospheric and Oceanic Optics 20, No. 7, 572 (2007).
N. D. Filipp, N. Sh. Blaunshtein, L. M. Erukhimov, V. A. Ivanov, and V. P. Uryadov, Modern Methods of Analysis of Dynamic Processes in the Ionosphere (Shtiintsa, Chiюinгu, 1991) [in Russian].
V. L. Ginzburg, Propagation of Electromagnetic Waves in Plasma (Nauka, Moscow, 1967) [in Russian].
