M.E. Zamarin

JSC «Central radio-research institute named after academician A.I. Berg» (Moscow, Russia)

The purpose of this paper is to obtain 2-D radar images involving inverse aperture synthesis based on signals with discrete linearfrequency modulation.

To obtain panoramic 2-D radar images rendered for a complete revolution of an object under study one can use a set of particular radar images rendered for different viewing angles unifying them into one radar image after revolution of each particular radar image on a fixed angle. Rendering of a panoramic 2-D radar image from a set of particular radar images allows to obtain images in a circular sector of synthesizing and leads to associating of separate centers of local scattering of an object under study to its configuration, thus improving identification of an object under study and more precise estimating of spatial-energy characteristics for compiling it centers of local scattering.

Particular 2-D radar images for a real object of irregular shape kind of “truck” for viewing angles 125° and 225° are shown in this paper. This radar images were obtained when object was placed on a turntable and was revolved in horizontal plane with constant angular velocity relative to radar measuring complex. As a rule, for a chosen viewing angle, they allow to reveal several centers of local scattering and estimate their coordinates. At the same time, it should be mentioned that in most cases using only a number of particular radar images it is rather difficult to identify an object of irregular shape.

A panoramic radar image for the same object that is also shown in this paper unlike a particular radar image rather accurately represents shape and outer dimensions of the object. Centers of local scattering on a panoramic radar image can be rather well associated with object configuration. There is a possibility to reveal some certain elements of its construction. One can see that in comparison with particular radar image panoramic radar image allows with a better quality to identify shape and dimensions of different objects, to classify them, to form databases.

Zamarin M.E. Theoretical aspects of 2-D radar images synthesizing. Radiotekhnika. 2021. V. 85. № 5. P. 17−27. DOI:

https://doi.org/10.18127/j00338486-202105-02 (In Russian)

1. Bendat Dzh., Pirsol A. Primenenija korreljacionnogo i spektral'nogo analiza: Per. s angl. M.: Mir. 1983. 312 s. (In Russian).
2. Majzel's E.N., Torgovanov V.A. Izmerenie harakteristik radiolokacionnyh celej. Pod red. M.A. Kolosova. M.: Sovetskoe radio. 1972.  232 s. (In Russian).
3. Pjatkin A.K., Nikitin M.V., Sharov A.I. Problemy cifrovogo sinteza i obrabotki chastotno-modulirovannyh impul'sov v radiolokacii. Radiotehnika. 2008. № 4. S. 27−30 (In Russian).
4. Nesterov S.M., Skorodumov I.A., Kovalev S.V., Skokov P.N., Olejnik V.M. i dr. Radiolokacionnye harakteristiki ob’ektov. Metody issledovanija. Pod red. S.M. Nesterova. M.: Radiotehnika. 2015. 312 s. (In Russian).
5. Nesterov S.M., Kovalev S.V. Poluchit' radiolokacionnoe izobrazhenie. Vozdushno-kosmicheskaja oborona. 2012. № 1 (In Russian).
6. Koshelev V.I. Adaptivnaja obrabotka radiolokacionnyh signalov na baze processora BPF. Cifrovaja obrabotka signalov. 2002. № 4.  S. 12−17. (In Russian).
7. Marpl-ml. S.L. Cifrovoj spektral'nyj analiz i ego prilozhenija: Per. s angl. M.: Mir. 1990. 265 s. (In Russian).