Title :
Uniform circular array in the parameter estimation of coherently distributed sources
Author :
Lee, Jooshik ; Song, Iickho ; Joung, Jin Gon
Author_Institution :
Dept. of Electr. Eng. & Comput. Sci., Korea Adv. Inst. of Sci. & Technol., Daejeon, South Korea
Abstract :
We consider the problem of two-dimensional (azimuth and elevation) direction-of-arrival estimation for coherently distributed sources using a pair of uniform circular arrays. We propose a low-complexity estimation algorithm, the sequential one-dimensional searching algorithm. The proposed algorithm has a basis on the eigenstructure between the steering matrix and signal subspace, and utilizes a preliminary estimate obtained by the total least square estimation of signal parameters via the rotational invariance technique as a pre-processing stage. The proposed algorithm exhibits as good estimation performance as the maximum likelihood method for coherently distributed sources. Some simulation results are included to show the performance of the proposed method.
Keywords :
antenna arrays; array signal processing; beam steering; direction-of-arrival estimation; eigenvalues and eigenfunctions; least squares approximations; matrix algebra; military communication; search problems; azimuth estimation; coherently distributed sources; eigenstructure; elevation estimation; low-complexity estimation algorithm; military communication; parameter estimation; performance; rotational invariance technique; sequential one-dimensional searching algorithm; signal parameters; signal subspace; steering matrix; total least square estimation; two-dimensional direction-of-arrival estimation; uniform circular arrays; Antenna arrays; Array signal processing; Azimuth; Direction of arrival estimation; Fading; Interchannel interference; Least squares approximation; Maximum likelihood estimation; Parameter estimation; Wireless communication;
Conference_Titel :
MILCOM 2002. Proceedings
Print_ISBN :
0-7803-7625-0
DOI :
10.1109/MILCOM.2002.1179659