A fractional delay filter is a device for bandlimited interpolation between samples. It finds
applications in numerous fields of signal processing, including communications, array …

The properties of digital all-pass filters are reviewed and a broad overview of the diversity of
applications in digital filtering is provided. Starting with the definition and basic properties of …

A new real-time IIR filter structure is presented that possesses exact phase linearity with 10-
1000 times fewer general multiplies than conventional FIR filters of similar performance and …

We consider a simple scheme for the design of allpass filters for approximation (or
equalization) of a given phase function using a least-squares error criterion. Assuming that …

We apply the eigenfilter method to design an allpass filter that approximates a given phase
response in the least-squares (LS) sense. As it is not possible to express the exact LS phase …

The problem of allpass filter design for phase approximation and equalization in the
Chebyshev sense is solved by using a generalized Remez algorithm. Convergence to the …

Complex discrete wavelet transforms (DWT) have significant advantages over real wavelet
transforms for certain signal processing problems. Two approaches to the implementation of …

This paper describes a new class of maximally flat low-pass recursive digital filters. The
filters are realizable as a parallel sum of two all-pass filters, a structure for which low …

A new method is proposed for designing IIR digital allpass filters with an equiripple phase
response that can be proven to be optimal in the Chebyshev sense. The proposed …

This paper describes an efficient algorithm for designing lattice wave digital (LWD) filters
(parallel connections of two all-pass filters) with short-coefficient wordlength. The coefficient …