## Search

Now showing items 1-10 of 34

#### Generalized Digital Butterworth Filter Design

(1995-01-15)

This paper presents a formula-based method for the design of IIR filters having more zeros than (nontrivial) poles. The filters are designed so that their square magnitude frequency responses are maximally-flat at <i>m</i> ...

#### Exchange Algorithms that Complement the Parks-McClellan Algorithm for Linear Phase FIR Filter Design

(1997-02-01)

This paper describes an exchange algorithm for the frequency domain design of linear phase FIR equiripple filters where the Chebyshev error in each band is specified. The algorithm is a hybrid of the algorithm of Hofstetter, ...

#### Magnitude Squared Design of Recursive Filters with the Chebyshev Norm Using a Constrained Rational Remez Algorithm

(1994-10-01)

We describe a Remez type exchange algorithm for the design of stable recursive filters for which the Chebyschev norm of H(w) - F(w) is minimized, where H(w) and F(w) are the realized and desired magnitude squared frequency ...

#### Extending Winograd's Small Convolution Algorithm to Longer Lengths

(1994-01-15)

For short data sequences, Winograd's convolution algorithms attaining the minimum number of multiplications also attain a low number of additions, making them very efficient. However, for longer lengths they require a ...

#### On the Moments of the Scaling Function psi_0

(1992-01-15)

This paper derives relationships between the moments of the scaling function psi_0(t) associated with multiplicity M, K-regular, compactly supported, orthonormal wavelet bases [6, 5] that are extensions of the multiplicity ...

#### Automatic Generation of Prime Length FFT Programs

(1996-01-01)

We describe a set of programs for circular convolution and prime length FFTs that are short, possess great structure, share many computational procedures, and cover a large variety of lengths. The programs make clear the ...

#### Theory of Regular M-band Wavelet Bases

(1993-12-20)

This paper constructs K-regular M-band orthonormal wavelet bases. K-regularity of the wavelet basis is known to be useful in numerical analysis applications and in image coding using wavelet techniques. Several characterizations ...

#### Magnitude Squared Design of Recursive Filters with the Chebyshev Norm Using a Constrained Rational Remez Algorithm

(1994-05-01)

We describe a Remez type exchange algorithm for the design of stable recursive filters for which the Chebyschev norm of H(w) - F(w) is minimized, where H(w) and F(w) are the realized and desired magnitude squared frequency ...

#### Approximate continuous wavelet transform with an application to noise reduction

(1998-05-20)

We describe a generalized scale-redundant wavelet transform which approximates a dense sampling of the continuous wavelet transform (CWT) in both time and scale. The dyadic scaling requirement of the usual wavelet ...

#### Wavelet Based Speckle Reduction with Applications to SAR based ATD/R

(1994-11-20)

This paper introduces a novel speckle reduction method based on thresholding the wavelet coefficients of the logarithmically transformed image. The method is computational efficient and can sinificantly reduce the speckle ...