Title :
Narrowband line-array beamforming: practically achievable resolution limit of unbiased estimators
Author :
Swingler, David N.
Author_Institution :
Div. of Eng., St. Mary´´s Univ., Halifax, NS, Canada
fDate :
4/1/1994 12:00:00 AM
Abstract :
Based on an approximation to the Cramer-Rao lower bound, it is demonstrated that meaningful resolution with an unbiased narrowband estimator requires a source separation of at least about 1/10 of a Rayleigh beamwidth, even under ideal circumstances, with 1/4 beamwidth being a more practically achievable figure
Keywords :
array signal processing; parameter estimation; signal detection; Cramer-Rao lower bound; Rayleigh beamwidth; narrowband line-array beamforming; resolution limit; source separation; unbiased narrowband estimator; Array signal processing; Frequency estimation; Gaussian noise; Narrowband; Phased arrays; Sensor arrays; Signal resolution; Signal to noise ratio; Source separation; Spatial resolution;
Journal_Title :
Oceanic Engineering, IEEE Journal of
