Js. Goldstein et Is. Reed, SUBSPACE SELECTION FOR PARTIALLY ADAPTIVE SENSOR ARRAY-PROCESSING, IEEE transactions on aerospace and electronic systems, 33(2), 1997, pp. 539-544
This paper introduces a cross-spectral metric for subspace selection a
nd rank reduction in partially adaptive minimum variance array process
ing. The counter-intuitive result that it is suboptimal to perform ran
k reduction via the selection of the subspace formed by the principal
eigenvectors of the array covariance matrix Is demonstrated. A cross-s
pectral metric is shown to be the optimal criterion for reduced-rank W
iener filtering.