МОДЕЛИРОВАНИЕ ЛОКАЦИОННЫХ СИГНАЛОВ, ОТРАЖЕННЫХ ОТ КРОМКИ ЗЕМЛЯ-МОРЕ

Abstract

Introduction: Mathematical models of echo signals from underlying surfaces of the land and sea are used in synthesis and analysis of aircraft onboard radars which carry out the search, detection and tracking of objects. In these cases, the echoes are noise on whose background the information signals are selected and processed. When approximating the density of the reflected signal amplitude probability distribution, many researchers use the Rayleigh distribution density. To approximate the amplitude distribution of signals reflected by an underlying surface, the studies of high-precision radars characteristics often use log-normal distribution density, Weibull distribution density, compound distributions and some other distribution densities. Purpose: We develop a universal algorithm to simulate the fluctuations of radar signals reflected from the edge of land and sea. Results: We have obtained a simulation algorithm which allows you to simulate the fluctuations of a signal reflected from the edge of land and sea. As the distribution laws for amplitude and power of the signals reflected from underlying surfaces, we used the log-normal law for the reflections from the sea, and the Weibull distribution law for the reflections from the land. The algorithm synthesis technique allows you to use other distribution laws, too. The simulation algorithms for the signals reflected from the land or sea are special cases of the presented algorithm. Practical relevance: This algorithm can be used in the development of coastline mapping equipment, as well as in testing flarecraft takeoff and landing modes near ports.