Paper Info
Title
Joint estimation of mutual coupling, element factor, and phase center in antenna arrays
Abstract
A novel method is proposed for estimation of the mutual coupling matrix of an antenna array. The method extends previous work by incorporating an unknown phase center and the element factor (antenna radiation pattern) in the model, and treating them as nuisance parameters during the estimation of coupling. To facilitate this, a parametrization of the element factor based on a truncated Fourier series is proposed. The performance of the proposed estimator is illustrated and compared to other methods using data from simulations and measurements, respectively. The Cramér-Rao bound (CRB) for the estimation problem is derived and used to analyze how the required amount of measurement data increases when introducing additional degrees of freedom in the element factor model. We find that the penalty in SNR is 2.5 dB when introducing a model with two degrees of freedom relative to having zero degrees of freedom. Finally, the tradeoff between the number of degrees of freedom and the accuracy of the estimate is studied. A linear array is treated in more detail and the analysis provides a specific design tradeoff.
Year
DOI
Venue
2007
10.1155/2007/30684
EURASIP J. Wireless Comm. and Networking
Keywords
Field
DocType
element factor model,phase center,novel method,estimation problem,proposed estimator,antenna array,linear array,antenna radiation pattern,joint estimation,mutual coupling matrix,element factor,measurement data increase,communication systems,telecommunications
Topology,Phase center,Coupling,Parametrization,Computer science,Communications system,Antenna array,Real-time computing,Fourier series,Statistics,Coupling matrix,Estimator
Journal
Volume
Issue
ISSN
2007
2
1687-1499
Citations 
PageRank 
References 
4
0.56
6
Authors
4
Name
Order
Citations
PageRank
Marc Mowlér140.56
Björn Lindmark281.15
Erik G. Larsson310189605.81
Björn E. Ottersten46418575.28