Measurement method for repetition frequencies of the blades of an aerial vehicle on the base of the convolution of the «secondary» modulation spectrum
Abstract
A novel measurement method for repetition frequencies of the blades of an aerial vehicle (in part, helicopter's main and tail rotor) for adaptation circuits of the radar sensor with an inverse synthesis of antenna aperture is proposed. The method based on the convolution of the spectrum of the «secondary» modulation of the signal with simultaneous compensation of the Doppler frequency of the reflected signal. This allows in typical conditions for the radar sensor rapid change of Doppler frequency to provide a long coherent accumulation and, accordingly, high accuracy of measurement of the rotational frequencies of the rotors.
About the Authors
S. R. Heister
Research institute of the Armed forces of Republic of Belarus
Belarus
Belarus
Heister Sergey Romanovich - D.Sci., professor, main researcher
220013, Minsk, P. Brovka st., 6
T. T. Nguyen
Belarusian state university of informatics and radioelectronics
Belarus
PG student of information radiotechnologies department
Belarus
PG student of information radiotechnologies department
References
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Review
For citations:
Heister S.R., Nguyen T.T. Measurement method for repetition frequencies of the blades of an aerial vehicle on the base of the convolution of the «secondary» modulation spectrum. Doklady BGUIR. 2019;(1):68-74. (In Russ.)
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