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ESTIMATION ACCURACY OF RADAR TARGET ANGULAR COORDINATE

D. I. Popov, PhD (technical sciences), professor, RSREU, Ryazan; This email address is being protected from spambots. You need JavaScript enabled to view it.

The potential to estimate the accuracy of radar target angular coordinate for discrete and linear scanning of antenna beam is considered. The aim of the paper is a comparative analysis of the potential accuracy of angular coordinate estimation for both types of scanning the antenna beam, depending on signal and clutter parameters and angular position of the target. For two positions of a discretely scanned antenna beam, a likelihood function is introduced that takes into account correlation properties of a signal and a clutter. Based on the Cramer-Rao expression, we obtain a formula for the variance of angular coordinate estimate. An approximation is proposed for the form of antenna directivity diagram. The results of calculations of root-mean-square error of angular coordinate measurement are presented. The results of calculations have established the fact that with discrete scanning of antenna beam it is possible to achieve higher accuracy of angular coordinate estimation than with linear scanning.

Key words: antenna beam, pattern form, discrete scanning, estimation potential accuracy, signal, clutter, radar target, angular coordinate.

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