Title :
Superresolution direction finding with rotating arrays
Author :
Zatman, Michael A.
Author_Institution :
Lincoln Lab., MIT, Lexington, MA, USA
fDate :
Oct. 29 2000-Nov. 1 2000
Abstract :
The rotation of an antenna array will degrade the accuracy and precision of superresolution algorithms used to estimate the directions of arrival of the signals present. The degradation is caused by the apparent motion of the signals during the period that the spatial covariance matrix is being estimated. In this paper a new method which compensates for the apparent motion is presented. The technique succeeds in reducing both the bias and variance of the direction finding results. Performance examples are shown for the popular root-MUSIC algorithm.
Keywords :
antenna theory; array signal processing; covariance matrices; direction-of-arrival estimation; linear antenna arrays; motion compensation; signal resolution; accuracy; antenna array; apparent motion; bias; compensation; degradation; direction of arrival; precision; root-MUSIC algorithm; rotating arrays; rotation; spatial covariance matrix; superresolution direction finding; variance; Antenna arrays; Covariance matrix; Degradation; Directive antennas; Eigenvalues and eigenfunctions; Motion estimation; Radar antennas; Sensor arrays; Signal resolution; Spatial resolution;
Conference_Titel :
Signals, Systems and Computers, 2000. Conference Record of the Thirty-Fourth Asilomar Conference on
Conference_Location :
Pacific Grove, CA, USA
Print_ISBN :
0-7803-6514-3
DOI :
10.1109/ACSSC.2000.910914
