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• W2061970804 abstract "This paper presents an adaptive method for maintaining paraunitary constraints on direct-form multichannel finite impulse response (FIR) filters. The technique is a spatiotemporal extension of a simple iterative procedure for imposing orthogonality constraints on nearly unitary matrices. A convergence analysis indicates that it has a large capture region, and its convergence rate is shown to be locally quadratic. Simulations of the method verify its capabilities in maintaining paraunitary constraints for gradient-based spatiotemporal principal and minor subspace tracking. Finally, as the technique is easily extended to multidimensional convolution forms, we illustrate such an extension for two-dimensional adaptive paraunitary filters using a simple image sequence encoding example." @default.
• W2061970804 created "2016-06-24" @default.
• W2061970804 creator A5052139937 @default.
• W2061970804 date "2006-10-17" @default.
• W2061970804 modified "2023-09-25" @default.
• W2061970804 title "An Adaptive Constraint Method for Paraunitary Filter Banks with Applications to Spatiotemporal Subspace Tracking" @default.
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• W2061970804 doi "https://doi.org/10.1155/2007/80301" @default.
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