Title :
Asymptotic performance analysis of bearing estimate for spatially distributed source with finite bandwidth
Author :
Liu, S.J. ; Wan, Q. ; Yang, J. ; Peng, Y.N.
Author_Institution :
Dept. of Electron. Eng., Tsinghua Univ., Beijing, China
fDate :
11/21/2002 12:00:00 AM
Abstract :
A signal model of the spatially distributed source with finite bandwidth is presented. The perturbation of the array covariance matrix caused by small bandwidth is analysed. The asymptotic bias of the maximum likelihood estimate of the source bearing is formulated. Numerical results illustrate that the additive bandwidth-induced bias monotonously increases with the spatio-temporal extension of the source.
Keywords :
array signal processing; covariance matrices; direction-of-arrival estimation; maximum likelihood estimation; MLE; ULA; array covariance matrix perturbation; asymptotic bias; asymptotic performance analysis; bandwidth-induced bias; bearing estimate; finite bandwidth source; maximum likelihood estimate; signal model; spatially distributed source; uniform linear array;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:20021041
