Сравнительная оценка методов определения направления прихода сигналов на основе выборочной корреляционной матрицы

Abstract

Six methods are considered in the analysis of the methods of angular superresolution of the signals: non-adaptive beamforming (Bartlett), Сapon (MVDL), thermal noise (TNA), Borgiotti-Lagunas (B-L), maximal entropy (MEM) and multiple signal classification (MUSIC). The comparative characteristic of the methods with assessing their advantages disadvantages and limitations is given. Theoretical resolution of these methods is assessed in the article. Numerical evaluation of resolution ability of the methods of direction arrival of the signal are obtained based on the simulation of various scenarios of signal-to-noise ratio, taking into account the use of correlated and uncorrelated signals, a different number of antenna elements and the values of the signal / interference + noise ratio. These estimations show the ultimate theoretical accuracy of the methods and the potential for their use in problems of space-time access with set limits. The simulation results confirmed the statistical consistency of these methods of estimation of arrival direction angles of correlated and uncorrelated signals from subscriber stations for the space-time sampling in the output of the linear equidistant antenna array.