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电信和无线电工程
SJR: 0.203 SNIP: 0.44 CiteScore™: 1

ISSN 打印: 0040-2508
ISSN 在线: 1943-6009

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电信和无线电工程

DOI: 10.1615/TelecomRadEng.v68.i2.50
pages 137-144

Spectral Selection of Very-Low Frequencies Processes

Oleg Sytnik
O.Ya. Usikov Institute for Radio Physics and Electronics, National Academy of Sciences of Ukraine, 12 Academician Proskura St., Kharkiv 61085, Ukraine
I. A. Vyazmitinov
A. Usikov Institute of Radio Physics and Electronics, National Academy of Sciences of Ukraine 12, Academician Proskura St., Kharkov 61085, Ukraine
Ye. I. Myroshnychenko
A. Usikov Institute of Radio Physics and Electronics, National Academy of Sciences of Ukraine, 12, Academician Proskura St., Kharkov 61085, Ukraine
Yu. A. Kopylov
A. Usikov Institute of Radio Physics and Electronics, National Academy of Sciences of Ukraine, 12, Academician Proskura St., Kharkiv 61085, Ukraine

ABSTRACT

Targets selection method based on the attribute of Doppler painting of the echo-signal phase structure is considered in the paper. The concept of orthogonal decomposition of the signal and precise representation of the function upon a discrete set of points using the full system of basis functions forms up the base of the method. The algorithm for calculation of the spectral estimates upon a limited in time selection of the signal is developed. The algorithm allows calculate spectral estimates of quasi-periodic processes with typical frequencies from 0.1 to 10 Hz. Stability and noise immunity of the algorithm are investigated. It is demonstrated that unlike the known methods of spectral super-resolution the suggested method does not provide for false spectral responses at decreasing of the signal-to-noise ratio.


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