%0 Journal Article 
%A Valenzuela Valdés, Juan Francisco
%A Martínez González, Antonio Manuel
%A Sánchez Hernández, David Agapito
%T Accurate Estimation of Correlation and Capacity for Hybrid Spatial-Angular MIMO Systems
%D 2009
%@ 0018-9545
%U http://hdl.handle.net/10317/1180
%X In this paper, several novel functions for accurately
estimating the correlation and the multiple-input–multiple-output
(MIMO) capacity of combined spatial and true polarization diversity
(TPD) schemes are proposed for the first time. Minimum
error estimation of the correlation for a hybrid spatial–TPD linear
scheme previously reported cannot be obtained by simple nonlinear
least-square estimators, and the use of genetic algorithms
(GAs) provides an accurate solution. Channel matrix coefficients
and MIMO capacities are analyzed for the diverse optimization
strategies employed, which aim to identify the best prediction of
MIMO performance. The novel functions are used with previously
reported results and validated for Rayleigh fading scenarios with
isotropic scattering using a multimode-stirred chamber (MIMO
Analyzer). An accurate prediction of high correlation values is
concluded to be of extreme importance for the final MIMO
performance estimation. This has been found to be particularly
important for estimating MIMO capacity with achieved prediction
accuracies of 1.1% at SNR = 15 dB. In contrast, the accurate
prediction of low correlation values has been found to have a
less-important effect on the final capacity-predicting performance.
%K Teoría de la Señal y las Comunicaciones
%K Funciones de correlación
%K Dipolo
%K Cámara multimodo
%K Correlation function
%K Dipole
%K Multimode chamber
%K Multiple input multiple output (MIMO)
%K Genetic Algorithm (GA)
%~ GOEDOC, SUB GOETTINGEN