Frequency-domain magnitude constraints for oversampling complex-modulated NPR filter bank system design ensuring prescribed signal-to-distortion ratio

Design approaches for oversampling complex-modulated analysis-synthesis filter bank systems (FBS) have to control multirate disturbances, due to down- and upsampling. Common design methods minimise multirate disturbances by optimising an objective function for arbitrarily given filter lengths. In co...

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Bibliographic Details
Published inElectronics letters Vol. 46; no. 3; p. 1
Main Authors Alfsmann, D, Göckler, H G
Format Journal Article
LanguageEnglish
Published Stevenage John Wiley & Sons, Inc 04.02.2010
Subjects
Approximation
Control systems
Design engineering
Disturbances
Filter banks
Optimization
Oversampling
Systems design
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Summary:Design approaches for oversampling complex-modulated analysis-synthesis filter bank systems (FBS) have to control multirate disturbances, due to down- and upsampling. Common design methods minimise multirate disturbances by optimising an objective function for arbitrarily given filter lengths. In contrast, approximate frequency-domain magnitude constraints are derived for FBS prototype filters, such that a prescribed signal-to-distortion ratio of the FBS output signal is ensured. It is shown that, these constraints can be met both by linear-phase equiripple and dedicated FBS filter design algorithms. Without the need of occupying the objective function of a (constrained) filter optimisation to minimise FBS disturbance, the resulting performance is close to that achieved with a current design method.
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ISSN:0013-5194
1350-911X