Joint frequency-elevation-azimuth estimation without pairing using L-shaped array

A new method for joint frequency, azimuth and elevation estimation of multiple narrow-band sources with L-shape array is presented. The key idea is based on subspace method with time-domain rotation and the estimations of the frequency parameter are firstly obtained from the eigenvalues of a constructed matrix, an estimation of array manifold matrix is given by the corresponding eigenvectors. Then the estimations of azimuth and elevation angle are obtained from the resultant array manifold. Compared to the available 2-D ESPRIT or the Propagator Method(PM), this method does not need any parameter matching, especially, this proposed method works well in case of lower signal to noise ratio (SNR) through a noise power reduction procedure.