A.V. Borisenkov1, O.V. Goryachkin2, A.S. Lifanov3, V.A. Ruznikov4

1–4 Povolzhskiy State University of Telecommunications and Informatics (Samara, Russia)

1 a.borisenkov@psuti.ru; 2 o.goryachkin@psuti.ru; 3 a.lifanov@psuti.ru; 4 rv@psuti.ru

Due to the development of digital technologies for receiving and transmitting radio location signals, the development of modern radars with a synthesized aperture has made it possible to widely use an ensemble of probing signals with periodic sequences of identical pulses. The manipulation of probing pulses in transmission opens up opportunities to reduce the level of interference of ambiguity in range, expand the capture bands, improve azimuth resolution, and reduce interference from the background surrounding the target. However, the literature currently does not sufficiently address the issues of synthesis and analysis of ensembles of probing signals for a synthetic aperture radar (RSA) placed on board an unmanned aerial vehicle. Several variants of the implementation of ensembles of probing signals in the RSA are considered, mathematical modeling and experimental testing are carried out on the basis of the RSA operating in the VHF frequency range, placed on board an unmanned aerial vehicle (UAV). The conducted modeling allows us to draw the following conclusions. The best characteristics are possessed by an ensemble of signals encoded by Huffman codes, where M-sequences were used to "scatter" the roots. In second place is an ensemble of signals encoded by composite M-sequences. However, with an increase in the base of probing signals (N>64), the best results are shown by an ensemble of signals based on composite M-sequences.

Borisenkov A.V., Goryachkin O.V., Lifanov A.S., Ruzhnikov V.A. Synthesis and analysis of an ensemble of SAR signals. Radiotekhnika. 2024. V. 88. № 9. P. 132−141. DOI: https://doi.org/10.18127/j00338486-202409-12 (In Russian)

1. Verba V.S. i dr. Radiolokacionnye sistemy zemleobzora kosmicheskogo bazirovanija. M.: Radiotehnika. 2010. (In Russian).
2. Antipov V.N. i dr. Radiolokacionnye stancii s cifrovym sintezirovaniem apertury antenny. M.: Radio i svjaz'. 1988 (In Russian).
3. Kondratenkov G.S., Frolov A.Ju. Radiovidenie. Radiolokacionnye sistemy distancionnogo zonirovanija Zemli. M.: Radio Engineering.  2005.(In Russian).
4. Gorjachkin O.V. Puti razvitija radiolokacionnyh kosmicheskih sistem distancionnogo zondirovanija Zemli. Vestnik Samarskogo gos. ajerokosmicheskogo un-ta im. akademika S.P. Koroljova (nacional'nogo issledovatel'skogo universiteta). 2010. № 2. S. 92-104 (In Russian).
5. Kuk Ch., Bernfel'd M. Radiolokacionnye signaly. M. Sovetskoe radio. 1971. (In Russian)
6. Varakin L.E. Sistemy svjazi s shumopodobnymi signalami. M.: Radio i svjaz'. 1985 (In Russian).
7. Kudrja A.I., Tolstov E.F., Chetverik V.N. Rasshirenie vozmozhnostej ispol'zovanija M-posledovatel'nosti v RSA. Materialy V Vseross. nauch. konf. «Radiofizicheskie metody v distancionnom zondirovanii sred». 2012. S. 518-531 (In Russian).
8. Savost'janov V.Ju. Primenenie ortogonal'nyh FKM-signalov dlja ustranenija v RSA neodnoznachnosti po dal'nosti. Radiotehnicheskie i telekommunikacionnye sistemy. 2024. № 1. S. 13-18 (In Russian).
9. Leuhin A.N. i dr. Vybor zondirujushhego signala dlja radiolokacionnogo kompleksa v rezhime sintezirovannoj apertury antenny. Sbornik trudov III Mezhdunar. konferencii i molodezhnoj shkoly «Informacionnye tehnologii i nanotehnologii» (ITNT-2017). Samara: Novaja tehnika. 2017. S. 821-828 (In Russian).
10. Leukhin A., Bezrodnyi V., Parsaev N. Signals for synthetic aperture radar. Procedia engineering. 2017. V. 201. Р. 398-407.
11. Tarasenko A.M. Issledovanie vlijanija sposobov formirovanija zondirujushhego signala kosmicheskogo RSA na kachestvo radiolokacionnogo izobrazhenija. Uspehi sovremennoj radiojelektroniki. 2015. № 5. S. 13-19 (In Russian).
12. Tarasenko A.M. Imitacija i analiz signalov razlichnyh radiotehnicheskih sistem sredstvami apparatnoprogrammnogo kompleksa jeksperimental'noj otrabotki. Problemy razrabotki perspektivnyh mikro-i nanojelektronnyh sistem (MJeS). 2018. № 4. S. 135-142 (In Russian).
13. Tarasenko A. Method of SAR sounding signals investigation and digital forming. ITM Web of Conferences. EDP Sciences. 2019. V. 30. P. 15030.
14. Elshazly A.R., Amein A.S., Abdelkader F.M., Youssef A.F., Safy M. Sidelobes reduction of optimized nonlinear frequency modulation in SAR system. 2023 5th Novel Intelligent and Leading Emerging Sciences Conference (NILES). Giza. Egypt. 2023. Р. 13-17. DOI: 10.1109/NILES59815.2023.10296612.
15. Goriachkin O.V. et al. SAR system for searching and detecting objects in the forest area, based on UAVs. 2022 VIII International Conference on Information Technology and Nanotechnology (ITNT). IEEE. 2022. Р. 1-4.