Theory and design of uniform DFT, parallel, quadrature mirror filter banks
نویسندگان
چکیده
منابع مشابه
Theory and Design of Uniform DFT, Parallel, Quadrature Mirror Filter Banks
AbSfrUCf -In this paper, the theory of uniform DFI, parallel, quadrature mirror filter (QMF) banks is developed. The QMF equations, i.e., equations that need to be satisfied for exact reconstruction of the input signal, are derived. The concept of decimated filters is introduced, and structures for both analysis and synthesis banks are derived using this concept. The QMF equations, as well as c...
متن کاملAn Efficient Algorithm to Design Nearly Perfect-Reconstruction Two-Channel Quadrature Mirror Filter Banks
In this paper, a novel technique for the design of two-channel Quadrature Mirror Filter (QMF) banks with linear phase in frequency domain is presented. To satisfy the exact reconstruction condition of the filter bank, low-pass prototype filter response in pass-band, transition band and stop band is optimized using unconstrained indirect update optimization method. The objective function is form...
متن کاملDesign of Two-Channel Quadrature Mirror Filter Banks Using Differential Evolution with Global and Local Neighborhoods
This paper introduces a novel method named DEGL (Differential Evolution with global and local neighborhoods) regarding the design of two channel quadrature mirror filter with linear phase characteristics. To match the ideal system response characteristics, this improved variant of Differential Evolution technique is employed to optimize the values of the filter bank coefficients. The filter res...
متن کاملDesign of Alias-free Linear Phase Quadrature Mirror Filter Banks Using Eigenvalue-eigenvector Approach
An eigenvalue-eigenvector approach for the design of two-channel linear phase quadrature mirror filter (QMF) bank is proposed. To reduce the computational complexity, finite-duration impulse response (FIR) low-pass prototype filter of the filter bank is represented by polyphase components. The design problem is formulated to optimize the filter tap weights of the low-pass prototype filter of th...
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 ...
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ژورنال
عنوان ژورنال: IEEE Transactions on Circuits and Systems
سال: 1986
ISSN: 0098-4094
DOI: 10.1109/tcs.1986.1085876