Title :
Resolution enhancement by periodicity constraints
Author :
Ziskind, Ilan ; Wax, Mati
Author_Institution :
RAFAEL, Haifa, Israel
fDate :
4/1/1990 12:00:00 AM
Abstract :
A scheme for enhancing the resolution of covariance-based direction-of-arrival estimators which is applicable to equispaced linear arrays and uncorrelated sources is discussed. It is based on the exploitation of the periodic structure of the spatial covariance function existing in these cases. Simulation results that demonstrate the enhanced resolution obtained by applying the method in conjunction with the MUSIC algorithm are included. The enhanced resolution is especially conspicuous in the threshold region
Keywords :
matrix algebra; signal detection; MUSIC algorithm; direction-of-arrival estimators; equispaced linear arrays; periodicity constraints; resolution enhancement; simulation results; spatial covariance function; threshold region; uncorrelated sources; Covariance matrix; Frequency; Iterative algorithms; Maximum likelihood estimation; Multiple signal classification; Narrowband; Sensor arrays; Signal to noise ratio; Silicon carbide; Spatial resolution;
Journal_Title :
Acoustics, Speech and Signal Processing, IEEE Transactions on
