Radar measurement of target angle elevation over the sea by matrix pencil method taking into account the interference of multipath and thermal noise of radar

Abstract

Subject and Purpose. The Matrix Pencil method is investigated as a means of increasing the accuracy of measuring the angles of low-altitude targets above sea level. The aim of the study was to evaluate its effectiveness in the conditions of interference created by multi-beam propagation, represented by mirror and diffuse reflection of radio waves from the sea surface, and thermal noise of radar receiving channels, and to justify measures to achieve high efficiency in different combinations. and obstacle levels. Methods and Methodology. The study was conducted by computer simulation. It covered the sea waves, which met the conditions of both specular and strong diffuse reflection, as well as different levels of thermal noise in the receiving channels of the radar. Typical conditions were used in the simulation: the length of the route – 2000 m, the height of the center of the receiving antenna at sea level – 12 m, the width of the antenna beam – 1°, the angular height of the target – 0.3°. The effectiveness of the method was determined by comparing it with the previously studied method of root-MUSIC under identical conditions. Results. The data on the errors of measuring the place angle when using different a priori parameters of the Matrix Pencil method are obtained. Recommendations for the choice of these parameters have been developed to minimize errors in measuring the angles of the place. The advantages and disadvantages of the Matrix Pencil method in comparison with the root-MUSIC method are noted. Conclusion. The obtained results can be used in the development of radars designed to support low-altitude objects above sea level.

Keywords

• angle errors
• elevation angle
• low-altitude target
• matrix pencil
• modeling
• multipath
• root-music
• thermal noise