A software antenna: Reconfigurable adaptive arrays based on eigenvalue decomposition

Citation
Y. Kamiya et al., A software antenna: Reconfigurable adaptive arrays based on eigenvalue decomposition, IEICE TR CO, E82B(12), 1999, pp. 2012-2020
Citations number
16
Categorie Soggetti
Information Tecnology & Communication Systems
Journal title
IEICE TRANSACTIONS ON COMMUNICATIONS
ISSN journal
09168516 → ACNP
Volume
E82B
Issue
12
Year of publication
1999
Pages
2012 - 2020
Database
ISI
SICI code
0916-8516(199912)E82B:12<2012:ASARAA>2.0.ZU;2-5
Abstract
Multimedia mobile communication systems are expected to be realized in the near future. In such systems, multipath fading can cause severe degradation s of the quality of the communications due to its wide bandwidth, especiall y in urban areas. Adaptive array antennas can be attractive solution for ov ercoming the multipath fading. Suppression can be achieved with the adaptiv e array by cophasing and combining multipath signals in the space and time domain. On the other hand, the concept of software antenna has been propose d. The software antenna recognizes radiowave environments and appropriately reconfigures itself for the signal processing required by the recognized e nvironment. Efficient implementations can be expected if these functions ar e realized by the software. In this paper, we propose two types of the adap tive array systems which is reconfigurable depending on the radiowave envir onment as a realization of the concept of the software antenna. They recogn ize the environment by using the eigenvalue decomposition of space domain c orrelation matrices and reconfigure their structures of the signal processi ng. The principle and performance are examined by theoretical means and thr ough computer simulations.