Telecommunications and Radio Engineering

THE CHOICE OF ROOT‐MUSIC PARAMETERS FOR RADAR MEASUREMENTS OF TARGET ELEVATION NEAR SEA SURFACE

ABSTRACT

The root‐MUSIC high spectral resolution algorithm has been considered recently as one of the means to solve the problem of increasing the accuracy of measuring the low‐altitude target elevation above rough sea. However, the traditional approach to the selection of a priori parameters of the method developed with spectral analysis does not reveal its advantage in accuracy compared to the best special methods proposed to solve this problem. This was the reason for the development of various modifications of the method. In this paper, computer simulations are used to study the method in its classical form, but with use of a priori parameters, including significantly different from those used in other studies. In particular this applies to the dimensionality of subspace of signals. It was found that the increase of the signal subspace dimensionality from two, due to the use of a specular reflection model, up to fiveseven, improves the measurement accuracy of the elevation of low‐altitude targets by several times. It was found that increases in accuracy occur in any case of strong diffuse or strong specular reflection of radio waves from the sea.