Simultaneous measuring of Doppler frequency shift and group delay time by means of amplitude-modulated LFM-signal

Alexey A. Kolchev; A. E. Nedopekin; V. V. Shumaev

doi:10.3103/S0735272710090050

Authors

Alexey A. Kolchev Kazan Federal University, Russian Federation https://orcid.org/0000-0002-1692-2558
A. E. Nedopekin Mari State University, Russian Federation
V. V. Shumaev Mari State University, Russian Federation

DOI:

https://doi.org/10.3103/S0735272710090050

Keywords:

linear-frequency modulation ionosonde, chirp-ionosonde, ionosphere, amplitude modulation, phase, Doppler shift, group delay time, noise, semiempirical simulation

Abstract

New method of the simultaneous measurement of the frequency dependencies of Doppler shift and group delay time of separate ionosphere modes by means of amplitude modulated chirp signal is presented in this paper. The algorithms for data processing are presented.

References

V. A. Ivanov, A. A. Kolchev, and V. V. Shumaev, “Influence of Non-Stationerity of SW-channel on Characteristics of Signals with Widened Spectrum,” Propagation and Diffraction of Electromagnetic Waves (MFTI, Moscow, 1994) [in Russian], pp. 73–79.

A. W. V. Pool, “Advanced Sounding. The FMCW Alternative,” Radio Sci. 20, No. 6, 1609 (1985).

A. A. Kolchev and V. V. Shumaev, “Measure of frequency dependences of Doppler frequency shift and spread time of each ionospheric mode with help of continuous LFM signal,” Izv. Vyssh. Uchebn. Zaved., Radioelektron. 52(2), 54 (2009) [Radioelectron. Commun. Syst. 52(2), 93 (2009), DOI: http://dx.doi.org/10.3103/S0735272709020071].

N. D. Filipp, N. Sh. Blaunshtein, and L. M. Yerukhimov, et al., Current Methods of Research of Dynamic Processes in Ionosphere (Shtiintsa, Chisinau, 1991) [in Russian].