A.M. Golik – Dr.Sc. (Eng.), Professor, Head of the Department, 

Saint-Petersburg Military Institute of National Guard troops

Е-mail: metr1956@yandex.ru

Yu.A. Shishov – Dr.Sc. (Eng.), Professor, 

Saint-Petersburg Military Institute of National Guard troops

Е-mail: urshishov@gmail.com

A.V. Podgorny – Deputy of Chief, 

Saint-Petersburg Military Institute of National Guard troops

Е-mail: aleksandr.podgorny@yandex.ru

A.A. Santalov − Ph.D. (Eng.), Senior Research Scientist, 

Research Laboratory, Moscow Higher Combined Arms Military Command School (Moscow). Е-mail: djimpuls1990@yandex.ru

At present, the conditions of radar stations operation have become significantly more complicated due to the flow intensity of aerial objects (AO) in the radar area of responsibility. In particular, in order to make timely decisions in a rapidly changing signalinterference environment, it is necessary to determine the size of a dense group of AOs, for which the radar must have high density in range and angular coordinates, and to perform resolution of AOs on these coordinates simultaneously. When digital antenna array (DAA) with principal beam (PB) electronic scanning is used as the radar antenna, the indispensable increase in the probing signals spectrum width to provide the maximum possible (potential) range resolution ability initiates distortions in the phase distribution of the field at the antenna aperture. Conversely, the increase in the linear dimensions of the aperture, which is necessary to provide potential angular resolution, imposes limitations on the ability to expand the spectrum of the probing signal. Thus, there is an objective contradiction between the maximum achievable values of radar density by range and angular coordinates in case of simultaneous, i.e. joint space-time processing of signals. That’s why there is an objective problem of providing a joint resolution of targets by range and angular coordinates in conditions of wide-angle electronic scanning of PB in wideband sounding of AOs. The solution of this problem is the purpose of the investigation. The tasks to be solved are to investigate the factors limiting the increase in the width of the probing signal spectrum; to analyze the methods of correcting field phase distribution on an antenna aperture; to develop proposals for technical implementation of joint resolution of targets by range and angular coordinates. A version of the structural scheme of the digital receiving module has been developed on the basis of theoretical investigations results. The implementation of the module will expand the functionality of the radar with the DAA, which differs from the known technical solutions by analog-to-digital conversion of the received signal on the carrier frequency and division of a wide spectrum of the signal into narrow-band sections by means of digital band-pass filters.

1. Gus'kov Ju.N., Zhiburtovich N.Ju., Abramenkov V.V., Vasil'chenko O.V., Klimov S.A., Savinov Ju.I., Muravskij A.P., Gavrilov A.D. Patent № 2516683. (Rossija). H01Q 21/00,G01S 13/26. Sposob cifrovogo formirovanija diagrammy napravlennosti aktivnoj fazirovannoj antennoj reshetki pri izluchenii i prieme linejno-chastotno-modulirovannogo signala. Zajavleno 17.10.2012. Opubl. 20.05.2014. Bjul. №14 (in Russian).
2. Samojlenko V.I., Shishov Ju.A. Upravlenie fazirovannymi antennymi reshetkami. M.: Radio i svjaz'. 1983. 240 s. (in Russian).
3. Vovshin B.M. Sverhshirokopolosnaja radiolokacija vozdushnyh ob#ektov s bezynercionnym obzorom prostranstva: Avtoref. diss. … dokt. tehn. nauk. 2005. 418 s. (in Russian).
4. Kol'cov Ju.V. Osobennosti primenenija razlichnyh opredelenij sverhshirokopolosnyh signalov v antennoj tehnike, svjazi i lokacii // Antenny. 2008. Vyp. 6(133). S. 31−42 (in Russian).
5. Spravochnik po radiolokacii. V 2-h knigah. Pod red. M. Skolnika. Per. s angl. pod obshhej red. V.S. Verby. Kn. 1. M.: Tehnosfera. 2014. 672 s. (in Russian).
6. Domatyrko D.G. Modelirovanie LChM-signalov i ih dostoinstva pered drugimi slozhnymi signalami. Vestnik VGTU. 2010. T. 6. № 4.  S. 144−149 (in Russian).
7. Topchiev. S.A., Nikitin M.V. Razrabotka v PAO «RADIOFIZIKA» RLS s cifrovymi AFAR. Sb. nauch. trudov po materialam XIII molodezhnoj nauchno-tehnicheskoj konferencii «Radiolokacija i svjaz' – perspektivnye tehnologii». M.: PAO «Radiofizika». 2015. S. 7−15  (in Russian).
8. Shurygin A.V. ACP – chto novogo? Jelektronika: NTB. 2009. № 1. S. 16−21 (in Russian).
9. Dobychina E.M., Malahov R.Ju. Cifrovoj priemo-peredajushhij modul' aktivnoj fazirovannoj antennoj reshetki. Nauchnyj vestnik MGTU GA. 2014. № 209. S. 117−123 (in Russian).
10. Geleseev A.M., Gurskij S.M., Egorov B.M., Panov S.L., Saprykin S.D., Jurchenko I.V. Patent RF № 2146076, MPK N03M 1/12. Analogocifrovoj modul'. Zajavleno 28.07.1997. Opublikovano 27.02.2000 (in Russian). 
11. Shishov Ju.A., Podol'cev V.V., Vahlov M.G., Luc'ko I.S. Patent RF № 2692417, N03M 1/12; H01Q 21/00. Analogo-cifrovoj modul' aktivnoj fazirovannoj antennoj reshetki. Zajavleno 19.10.2017. Opublikovano 24.06.2019 (in Russian).
12. Gol'denberg L.M., Matjushkin B.D., Poljak M.N. Cifrovaja obrabotka signalov: Spravochnik. M.: Radio i svjaz'. 1985. 312 s. (in Russian).
13. Frenzel L. High-Speed Data Converters Make Direct-Sampling Receivers Practical. Electronic Design. Feb. 12 2019.  URL: https://www.electronicdesign.com/analog/high-speed-data-converters-make-direct-sampling-receivers-practical (in Russian).
14. Multicore Fixed and Floating-Point Digital Signal Processor. Check for Evaluation Modules (EVM): TMS320C6678. Texas Instruments. TMS320C6672. SPRS708E. November 2010. Revised March 2014 (in Russian).
15. Speed per Milliwatt Rations for Fixed-Points Parcaged Processors/ Berkeley Design Technolog. Inc. Nov. 2013 (in Russian).