Table of Contents
ISRN Signal Processing
Volume 2013 (2013), Article ID 859590, 8 pages
http://dx.doi.org/10.1155/2013/859590
Research Article

High-Resolution Direction-of-Arrival Estimation via Concentric Circular Arrays

Department of Electronics and Communications Engineering, Istanbul Technical University, Maslak 34469, Istanbul, Turkey

Received 5 February 2013; Accepted 28 February 2013

Academic Editors: Y.-S. Chen, L.-M. Cheng, C. S. Lin, and W. Zuo

Copyright © 2013 Serdar Ozgur Ata and Cevdet Isik. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Estimating the direction of arrival (DOA) of source signals is an important research interest in application areas including radar, sonar, and wireless communications. In this paper, the problem of DOA estimation is addressed on concentric circular antenna arrays (CCA) in detail as an alternative to the well-known geometries of the uniform linear array (ULA) and uniform circular array (UCA). We define the steering matrix of the CCA geometry and investigate the performance analysis of the array in the DOA-estimation problem by simulations that are realized through varying the parameters of signal-to-noise ratio, number of sensors, and resolution angle of sensor arrays by using the MUSIC (Multiple Signal Classification) algorithm. The results present that CCA geometries provide higher angle resolutions compared to UCA geometries and require less physical area for the same number of sensor elements. However, as a cost-increasing effect, higher computational power is needed to estimate the DOA of source signals in CCAs compared to ULAs.