Title :
Coherent signal classification using symmetry considerations
Author :
Pillai, S. Unnikrishna ; Lee, Youngjik
Author_Institution :
Dept. of Electr. Eng. & Comput. Sci., Polytech. Univ., New York, NY, USA
Abstract :
The problem of locating the directions of arrival of a set of coherent/correlated signals in an arbitrary noise field using multiple sensor elements is considered. It is shown that by making use of a symmetric array, it is possible to perform a preprocessing on the array output correlations to generate a set of new quantities that are functionally similar to the actual correlations in an incoherent environment. The orthogonality of the direction vectors corresponding to the true angles of arrival and a set of eigenvectors of the Toeplitz matrix generated from these new quantities is then made use of in estimating the actual multipath arrival angles.<>
Keywords :
correlation methods; eigenvalues and eigenfunctions; noise; signal detection; signal processing; Toeplitz matrix; arbitrary noise field; coherent signal classification; correlated signals; direction vectors; directions of arrival; eigenvectors; incoherent environment; multipath arrival angles; multiple sensor elements; preprocessing; symmetric array; symmetry considerations; Array signal processing; Covariance matrix; Jamming; Layout; Modems; Pattern classification; Radar applications; Sensor arrays; Signal processing; Signal resolution;
Journal_Title :
Acoustics, Speech and Signal Processing, IEEE Transactions on
