Accurate subspace tracking algorithms based on cross-space properties

Abstract
In this paper, we analyse the issue of efficiently using Givensrotations to perform a more accurate SVD-based subspacetracking. We propose an alternative type of decompositionwhich allows a more versatile use of Givens rotations.We also show the direct effect of the latter on the trackingerror, and develop a cross-terms cancellation conceptwhich leads to a class of high performance algorithms withvery low complexity: O(N2) if signal and noise subspacesare tracked, O(Nr) if only the...

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