| 摘要 |
This method of determining the direction of arrival, respectively the direction of arrival and the polarisation, of signals emanating from several radioelectric sources by means of an array of space diversity sensors, composed of P reception pathways, comprises the following steps: a) calculating (106) the successive discrete Fourier transforms of the signal received sampled so as to obtain a P-vectorial time-frequency grid of measurements of the signal sliced into windows; b) over each window (120), b1 - calculating (122) the covariance matrix (C), b2 - enumerating sources so as to identify a mono source of bi source window, b3 - determine (124) the largest eigenvalues, and associated eigenvectors of the matrix; c) discretising the domain of directions of arrival (θ); d) generating directional vectors (U) from the discretised directions of arrival (θ); e) associating (130) the directional vectors (U) with the windows; f) for each set of windows associated with one and the same directional vector (U), obtaining (140) the filtered directional vector of the corresponding source by calculating the associated eigenvector with the largest eigenvalue of a matrix constructed on the basis of the eigenvalues and eigenvectors of the covariance matrices (C) of the windows. |
