S.E. Fetisov1

1 JSC “All-Russian Scientific Research Institute of Radio Engineering” (JSC VNIIRT) (Moscow, Russia)

1 s.e.fetisov@mail.ru

When designing a radar, the value of random measurement errors is taken to be approximately equal to the theoretically achievable (potential) accuracy. Meanwhile, the measurement accuracy of radars constructed with linear digital signal processing can be significantly lower than the theoretical one. In some cases, this leads to the need for modifications and repeated tests of new radar samples. Taking into account some technical limitations that are always present in radars of this type allows us to predict the value of random errors tens of percent more accurately. Namely: the limitation on the number of input channels of the optimal measuring device and non-zero correlation of noise in these channels.

The article substantiates the estimates of the accuracy of measurements in radars with linear multichannel digital signal processing, which supplement the estimates of potential accuracy by taking into account the number of input channels of the optimal measuring device and interchannel correlations. In a generalized measurement system, the dependence of random measurement errors on the parameters of the signal, noise and the matrix of the multichannel filter is determined. Based on this dependence, estimates of the accuracy required for the design of pulsed circular and sector scanning radars were obtained. The obtained estimates allow us to predict the accuracy of the radar more accurately than the known estimates of potential accuracy. The proposed formulas are valid not for continuous signals, but for signals sampled in space and/or time, which in some cases better meets the needs of modern development.

Fetisov S.E. Estimation accuracy realizable in radar with linear digital signal processing. Radiotekhnika. 2025. V. 89. № 11. P. 43−52. DOI: https://doi.org/10.18127/j00338486-202511-04 (In Russian)

1. Teoreticheskie osnovy radiolokacii: Ucheb. posobie dlja vuzov. Pod red. Ja.D. Shirmana. M.: Sovetskoe radio. 1970. 560 s. (in Russian).
2. Shirman Ja.D., Manzhos V.N. Teorija i tehnika obrabotki radiolokacionnoj informacii na fone pomeh. M.: Radio i svjaz'. 1981. 416 s. (in Russian).
3. Radiojelektronnye sistemy: osnovy postroenija i teorija: Spravochnik. Izd. 2-e, pererab. i dop. Pod red. Ja.D. Shir-mana. M.: Radiotehnika. 2007. 510 s. (in Russian).
4. Grishin Ju.P., Ipatov V.P., Kazarinov Ju.M. i dr. Radiotehnicheskie sistemy: Uchebnik dlja vuzov. Pod red. Ju.M. Ka-zari-nova. M.: Vysshaja shkola. 1990. 496 s. (in Russian).
5. Richards M.A. Fundamentals of Radar Signal Processing. Second Edition. McGraw-Hill Press. 2005.
6. Kay S.M. Fundamentals of Statistical Signal Processing: Estimation Theory. PTR Prentice Hall. 1993.
7. Kay S.M. Fundamentals of Statistical Signal Processing. Volume 3. Practical Algorithm Development. PTR Prentice Hall. 2013.
8. Holder E.J. Angle of Arrival Estimation Using Radar Interferometry: Methods and Applications. SciTech Publishing. 2014.
9. Bakulev P.A. Radiolokacionnye sistemy: Uchebnik dlja vuzov. M.: Radiotehnika. 2015. 437 s. (in Russian).
10. Vovshin B.M. Teoreticheskie osnovy radiolokacionnogo nabljudenija celej: Uchebnik. M.: PAO «NPO «Almaz». 2022. 312 s. (in Russian).
11. Fetisov S.E. Povyshenie tochnosti monoimpul'snoj pelengacii v mnogoluchevyh antennyh reshetkah. Vestnik Kon-cerna VKO «Almaz – Antej». 2022. № 4. S. 32–40 (in Russian).
12. Rife D., Boorstyn R. Single tone parameter estimation from discrete-time observations. IEEE Transactions on Information Theory. 1974. V. 20. № 5. P. 591–598.
13. Ratynskij M.V., Porsev V.I. Monoimpul'snaja pelengacija v RLS s cifrovymi FAR. Monografija. Pod red. V.I. Por-seva. M.: Radiotehnika. 2019. 160 s. (in Russian).