Title :
Estimation of source separation with an array of arbitrary shape
Author :
Bhuyan, A. ; Schultheiss, P.
Author_Institution :
AT&T Bell Lab., Murray Hill, NJ, USA
Abstract :
Analytical expressions are obtained for the Cramer-Rao bound on average bearing and angular separation of two independent far-field sources radiating narrowband Gaussian noise. It is shown that all relevant features of array geometry are summarized by the conventional beam pattern function. For sources separated by less than the main lobe width of the beam pattern, the significant properties of the beam pattern are summarized by two simple geometrical factors. For small source separations lack of prior knowledge of source power levels seriously degrades performance
Keywords :
estimation theory; random noise; signal detection; signal processing; Cramer-Rao bound; angular separation; average bearing; beam pattern function; estimation theory; far-field sources radiating narrowband Gaussian noise; performance degradation; source separation; Acoustic beams; Covariance matrix; Degradation; Estimation error; Frequency; Gaussian noise; Geometrical optics; Narrowband; Noise level; Sensor arrays; Shape; Source separation;
Conference_Titel :
Acoustics, Speech, and Signal Processing, 1990. ICASSP-90., 1990 International Conference on
Conference_Location :
Albuquerque, NM
DOI :
10.1109/ICASSP.1990.116200
