A.L. Priorov – Dr.Sc.(Eng.), Professor, 

P.G. Demidov Yaroslavl State University

E-mail: andcat@yandex.ru

E.E. Tsubanov – Lecturer, 

Yaroslavl Higher Military School of Air Defence

Е-mail: tzubаnoff.еvgeny@уаndex.ru

Problem statement. When two sources of continuous noise radiation are found in the same pulsed volume, they are perceived as a single object by the radar.

Goal. In relation to the two-channel amplitude sum-difference monopulse system, the algorithm of angular superresolution of objects of the concentrated group target is investigated.

Results. The research was carried out by computer simulation. The values of statistical characteristics of estimates of angular coordinates of each of the objects of the two-point target are given.

Practical significance. The simulation results indicate the possibility of angular resolution of radiation sources at the angular base of the group less than ten percent of the beam width of the radar antenna.

The research results of the increase in the angular resolution of the amplitude difference single pulse system are considered. Such systems are commonly implemented in modern multifunctional radars.

The relevance of the research is due to the relatively low spatial selectivity of existing direction finding systems. This is a very serious drawback that limits their possibilities for an objective assessment of the quantitative composition of the observed radar target. In addition, this complicates the determination of the nature of the construction of a compact group goal and, as a result, causes difficulties in establishing the importance and priority of the target when target pointing.

The main purpose of the research was to provide the «superresolution» of the group objects in the angular coordinate. It consisted of two independent objects, not resolvable in range and speed. The problem is solved by using the developed algorithm, by additional processing of the signals received by the radar.

The results are obtained by computer simulation using operators and computational procedures of the MATLAB.

The generalized structure of the single pulse radar receiving path used, the models and time-frequency parameters of the object signals by the grouped target and the internal noise of the receiving channels are considered, the methodology and results of the statistical experiment are described.

For various versions of the values of the angular base of the radiation sources of the grouped target, their relative position relative to the equal-signal direction of the antenna, the graphs of the probability density distribution of estimates of the angular position of each of the objects of the group. Quantitative estimates of the parameters of the distribution law are also given, values of the angular resolution indicators are obtained, an analysis is made, conclusions and generalizations are made.

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4. Pat. № 100293 RF po zayavke № 2010109713 ot 15.03.2010. Ustroistvo obnaruzheniya gruppy iz dvukh istochnikov nepreryvnogo shumovogo izlucheniya, nakhodyashchikhsya v luche amplitudnoi summarno-raznostnoi monoimpulsnoi sistemy. Kuzmin S.A., Lavrentev A.M., Marintsev Yu.N., Tsubanov E.E. (in Russian)
5. Pat. № 102390 RF po zayavke № 2010135257 ot 23.08.2010. Ustroistvo obnaruzheniya impulsnogo ekhosignala v usloviyakh vozdeistviya shumovoi pomekhi po glavnomu lepestku diagrammy napravlennosti antenny monoimpulsnoi RLS. Kuzmin S.A., Lavrentev A.M., Tsubanov E.E. (in Russian)
6. Tsubanov E.E. Metod povysheniya uglovogo razresheniya obzornoi monoimpulsnoi RLS v usloviyakh vozdeistviya shumovoi pomekhi. Radiotekhnicheskie i telekommunikatsionnye sistemy. 2013. № 4. S. 36−43. (in Russian)
7. Priorov A.L., Tsubanov E.E. Metod obnaruzheniya monoimpulsnoi RLS signala, nablyudaemogo na fone shumovoi pomekhi. Antenny. 2014. № 12. S. 32−37. (in Russian)
8. Priorov A.L., Tsubanov E.E. Rezultaty polunaturnogo issledovaniya vozmozhnosti obnaruzheniya v luche RLS gruppovoi sosredotochennoi tseli. Uspekhi sovremennoi radioelektroniki. 2019. № 1. S. 63−69. DOI: 10.18127/j20700784-201901-07. (in Russian)
9. Avtorskoe svidetelstvo № 170615. Izobretenie po zayavke № 3018162 s prioritetom ot 12.05.81 g.. Burtsev V.V., Kosarev V.M., Tsubanov E.E. (in Russian)