Title :
On optimization of antennas without phase center for DOA estimation
Author :
Tran Thi Thuy ; Linh-Trung, Nguyen ; Anh, Phan ; Abed-Meraim, Karim
Author_Institution :
Fac. of Electron. & Telecommun., VNU Univ. of Eng. & Technol., Hanoi, Vietnam
Abstract :
Antennas without phase center (AWPC) are applied to resolve the less-sensors-than-sources problem in direction-of-arrival (DOA) estimation using subspace methods, typically, the well-known multiple signal classification (MUSIC) algorithm. This paper focuses on optimization of some design parameters of such antennas, including the rotation angle, the rotation step number and distances of two dipole couples, in order to improve the ambiguity and accuracy of all estimators which use AWPC structure. These optimization problems are formulated and solved by using Cramer-Rao bound (CRB) and ambiguity checking criteria. Specially, the parameters were optimized to avoid issues related to the ambiguity for half space localization problem while minimizing the CRB for improving the DOA estimation accuracy.
Keywords :
dipole antennas; direction-of-arrival estimation; signal classification; AWPC structure; CRB; Cramer-Rao bound; DOA estimation; MUSIC algorithm; ambiguity checking criteria; antenna optimization; antennas without phase center; dipole couples; direction-of-arrival estimation; half space localization problem; multiple signal classification; rotation step number; Antennas; Arrays; Direction of arrival estimation; Estimation; Multiple signal classification; Optimization; Vectors; Antenna without Phase Center (AWPC); Cramer-Rao Bound (CRB); Direction of Arrival (DOA); Multiple Signal Classification (MUSIC);
Conference_Titel :
Communications and Electronics (ICCE), 2012 Fourth International Conference on
Conference_Location :
Hue
Print_ISBN :
978-1-4673-2492-2
DOI :
10.1109/CCE.2012.6315942