Journal of Radio Electronics. eISSN 1684-1719. 2024. №3
Full text in Russian (pdf)
DOI: https://doi.org/10.30898/1684-1719.2024.3.11
RADAR WITH HOLOGRAPHIC CODING
OF PROBING SIGNAL
A.L. Timofeev, A.Kh. Sultanov, I.K. Meshkov, A.R. Gizatulin
Ufa University of Science and Technology
450076, Russia, Ufa, Z. Validi Street, 32
The paper was received February 9, 2024.
Abstract. A method has been developed for generating a radar probing signal by phase-code manipulation of the signal with a binary sequence, which is a one-dimensional digital hologram of a virtual optical object. The effectiveness of this method is determined by the use of the fundamental property of the hologram - divisibility, which allows you to restore the original object from a distorted fragment of the hologram. Modeling of radar detection and measurement of target parameters in noise conditions has been carried out, and the results of a comparison of holographic coding with the widely used method of generating a sounding signal by phase-code manipulation of the signal with a pseudo-random binary sequence having a maximum period (maximum length sequence, M-sequence) are presented. It is shown that the holographic method of generating a probing signal and decoding an echo signal, proposed for use in digital radar, provides high noise immunity at high levels of noise, natural and artificial interference, increases the target detection range, provides resolution of several targets, including small targets against the background of large ones , and improves the accuracy of speed measurement. As a result of the simulation, it was found that replacing phase-code keying with the M-sequence with holographic coding gives a gain in signal-to-noise ratio of 20 dB. It is shown that the transition from coding the shape of the probing signal to holographic coding of the shape of its spectrum in a channel with additive white Gaussian noise allows us to obtain an additional increase in noise immunity by 8 dB.
Key words: digital radar, probing signal, holographic coding, spectral coding.
Financing: The study was supported by the grant of Russian Science Foundation № 24-29-0008, https://rscf.ru/project/24-29-00080/.
Corresponding author: Timofeev Aleksandr Leonidovich, a_l_t@inbox.ru
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For citation:
Timofeev A.L., Sultanov A.Kh., Meshkov I.K., Gizatulin A.R. Radar with holographic coding of probing signal. // Journal of Radio Electronics. – 2024. – №. 3. https://doi.org/10.30898/1684-1719.2024.3.11 (In Russian) |