A hybrid method for the design of oversampled uniform DFT filter banks
نویسندگان
چکیده
منابع مشابه
A hybrid method for the design of oversampled uniform DFT filter banks
Subband adaptive filters have been proposed to speed up the convergence and to lower the computational complexity of time domain adaptive filters. However, subband processing causes signal degradations due to aliasing effects and amplitude distortions. This problem is unavoidable due to further filtering operations in subbands. In this paper, the problem of aliasing effect and amplitude distort...
متن کاملDesign of oversampled uniform DFT filter banks with delay specification using quadratic optimization
Subband adaptive filters have been proposed to avoid the drawbacks of slow convergence and high computational complexity associated with time domain adaptive filters. Subband processing introduces transmission delays caused by the filter bank and signal degradations due to aliasing effects. One efficient way to reduce the aliasing effects is to allow a higher sample rate than critically needed ...
متن کاملSimple design of oversampled uniform DFT filter banks with applications to subband acoustic echo cancellation
Subband adaptive "ltering, which is the basis of modern acoustic echo cancellation (AEC) systems, is an important application of "lter banks in which critical sampling cannot be used in general because of decimation aliasing e!ects. This leads to the use of oversampling schemes in the "lter bank design wherein the perfect-reconstruction (PR) or near PR property is still required. In this work, ...
متن کاملDesign of oversampled uniform DFT filter banks with reduced inband aliasing and delay constraints
Subband adaptive filters have been proposed to avoid the drawbacks of slow convergence and high computational complexity associated with time domain adaptive filters. Subband processing introduces transmission delays caused by the filter bank and signal degradations due to aliasing effects. One efficient way to reduce the aliasing effects is to allow a higher sample rate than critically needed ...
متن کاملNon-uniform Near-perfect-reconstruction Oversampled Dft Filter Banks Based on Allpass-transforms
NON-UNIFORM NEAR-PERFECT-RECONSTRUCTION OVERSAMPLED DFT FILTER BANKS BASED ON ALLPASS-TRANSFORMS Enisa Galijašević and Jörg Kliewer University of Kiel Institute for Circuits and Systems Theory 24143 Kiel, Germany [email protected], [email protected] ABSTRACT In this contribution we discuss an oversampled non-uniform DFT filter bank, which is derived by allpass frequency transformations from it...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Signal Processing
سال: 2006
ISSN: 0165-1684
DOI: 10.1016/j.sigpro.2005.02.023