Title :
Direction-of-Arrival Estimation in the Presence of Unknown Nonuniform Noise Fields
Author :
Wu, Yuntao ; Hou, Chaohuan ; Liao, Guisheng ; Guo, Qinghua
Author_Institution :
Integrated Digital Syst. Lab., Chinese Acad. of Sci., Beijing
fDate :
4/1/2006 12:00:00 AM
Abstract :
A new method for estimating directions-of-arrival (DOA) of multiple spatial narrowband signals in the presence of spatially nonuniform independent sensor noise with unknown covariance is presented. An estimate of the colored noise-covariance matrix is given first. The received data for parameter estimation is then prewhitened using the estimated noise covariance, hence, overcoming the highly biased estimates. Furthermore, the performance improvement of standard MUSIC method is confirmed by computer simulations
Keywords :
array signal processing; covariance matrices; direction-of-arrival estimation; noise; array signal processing; colored noise-covariance matrix; direction-of-arrival estimation; nonuniform noise; parameter estimation; spatial narrowband signals; standard MUSIC method; Array signal processing; Colored noise; Covariance matrix; Direction of arrival estimation; Gaussian noise; Multiple signal classification; Narrowband; Sensor arrays; Sparse matrices; Working environment noise; Array signal processing; direction-of-arrival (DOA) estimation; nonuniform noise;
Journal_Title :
Oceanic Engineering, IEEE Journal of
DOI :
10.1109/JOE.2006.875270
