DocumentCode :
2225028
Title :
Modelling and manipulation of Polarimetric antenna beam patterns via spherical harmonics
Author :
Del Galdo, Giovanni ; Lotze, Jorg ; Landmann, Markus ; Haardt, Martin
Author_Institution :
Commun. Res. Lab., Ilmenau Univ. of Technol., Ilmenau, Germany
fYear :
2006
fDate :
4-8 Sept. 2006
Firstpage :
1
Lastpage :
5
Abstract :
Measured antenna responses, namely their beam patterns with respect to the vertical and horizontal polarizations, play a major role in realistic wireless channel modelling as well as in parameter estimation techniques. The representations commonly used suffer from drawbacks introduced by the spherical coordinate system which is affected by two knots at the poles. In general, all methods which describe the beam pattern with a matrix fail in correctly reproducing its inherent spherical symmetry. In this contribution we propose the use of the Spherical Fourier Transformation (SFT) which allows the description of the beam pattern via spherical harmonics. This mathematical tool, well known in other fields of science, is rather new to wireless communications. In this context, the main applications of the SFT include the efficient description of a beam pattern, noise filtering, the precise interpolation in the spherical Fourier domain, and the possibility to obtain an equivalent description of the beam pattern for an arbitrary coordinate system. The latter allows us to improve an existing 2-D FFT based technique: the Effective Aperture Distribution Function (EADF).
Keywords :
aperture antennas; fast Fourier transforms; filtering theory; matrix algebra; parameter estimation; wireless channels; 2D FFT based technique; EADF; SFT; effective aperture distribution function; noise filtering; parameter estimation technique; polarimetric antenna beam pattern manipulation; precise interpolation; spherical Fourier transformation; spherical coordinate system; spherical harmonic; wireless channel modelling; wireless communication; Abstracts; Azimuth; Equations; Sensor arrays; Vectors;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Signal Processing Conference, 2006 14th European
Conference_Location :
Florence
ISSN :
2219-5491
Type :
conf
Filename :
7071631
Link To Document :
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