Title :
High resolution estimation of directions of arrival in nonuniform noise
Author :
Zoubir, Abdelhak M. ; Aouada, Saïd
Author_Institution :
Signal Process. Group, Darmstadt Univ. of Technol., Germany
Abstract :
We consider the problem of direction of arrival estimation in the presence of unknown spatially nonuniform noise. A subspace separation approach is applied, based on successive array element elimination, to isolate the contribution of the noise powers. A high resolution estimator based on MUSIC is described for nonuniform noise. Performance of the estimator is assessed through simulations and is compared to the Cramer-Rao bound.
Keywords :
array signal processing; covariance matrices; direction-of-arrival estimation; random noise; signal classification; source separation; Cramer-Rao bound; DOA estimation; MUSIC; covariance matrix; direction of arrival estimation; spatially nonuniform noise; subspace separation approach; successive array element elimination; Covariance matrix; Direction of arrival estimation; Eigenvalues and eigenfunctions; Maximum likelihood estimation; Multiple signal classification; Sensor arrays; Signal resolution; Signal to noise ratio; Spatial resolution; Working environment noise;
Conference_Titel :
Acoustics, Speech, and Signal Processing, 2004. Proceedings. (ICASSP '04). IEEE International Conference on
Print_ISBN :
0-7803-8484-9
DOI :
10.1109/ICASSP.2004.1326200
