Convergence improvement for oversampled subband adaptive...

Details Convergence improvement for oversampled subband adaptive... Convergence improvement for oversampled subband adaptive...

H - Electricity

03

H

H03H 21/00 (2006.01) G10L 21/02 (2006.01) H04B 3/21 (2006.01) H04B 3/23 (2006.01)

Patent

CA 2399159

A method of improving the convergence properties of the oversampled subband adaptive filters is disclosed. The method comprises steps of: (a) whitening by spectral emphasis, where, after WOLA analysis, subband signals are decimated by a factor of M/OS where M is the number of filters and OS is the oversampling factor, or (b) whitening by additive noise, where high-pass noise is added to bandpass signals to make them whiter in spectrum; or (c) whitening by decimation, where the subband signals are further decimated by a factor of DEC<OS; or (d) a combination of the above steps (a),(b) and (c).

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