Title :
Analysis of effect of non-ideal beam-space preprocessors on eigenspace DOA estimators
Author :
Radich, William ; Buckley, Kevin M.
Author_Institution :
Dept. of Electr. Eng., Minnesota Univ., Minneapolis, MN, USA
Abstract :
Analytical expressions for MUSIC DOA estimator variance and bias are used to study the effects of beam-space preprocessor matrix characteristics on beam-space MUSIC. It is shown that simultaneously steering to a desired sector while nulling another via the beamformer matrix in general degrades variance performance with respect to the performance achievable in beam-space. This the degradation is ascribed to the fact that as the null sector approaches the source sector of interest, the beamformer matrix range no longer contains both the span of the array response vectors within the source sector and their derivatives
Keywords :
array signal processing; eigenvalues and eigenfunctions; parameter estimation; statistical analysis; beam-space MUSIC; beam-space preprocessor matrix characteristics; eigenspace DOA estimators; ing; performance; steering; Analysis of variance; Colored noise; Covariance matrix; Degradation; Direction of arrival estimation; Multiple signal classification; Phased arrays; Sensor arrays; Silicon carbide; Spatial resolution;
Conference_Titel :
Statistical Signal and Array Processing, 1992. Conference Proceedings., IEEE Sixth SP Workshop on
Conference_Location :
Victoria, BC
Print_ISBN :
0-7803-0508-6
DOI :
10.1109/SSAP.1992.246798
