On the design of adjustable fractional delay fir filters

Johansson, Håkan; Lowenborg, P.

doi:10.1109/tcsii.2003.809712

Cited by 103 publications

(109 citation statements)

References 7 publications

Supporting

Mentioning

108

Contrasting

Order By: Relevance

“…This follows immediately by truncating the Taylor series expansion of e −jωd , see [41]. Further, when there are no restrictions on the fixed part of the delay, it is possible and efficient to use linear-phase subfilters H k (z), thus with symmetric or antisymmetric impulse responses.…”

Section: Using the Farrow Structure H(z D) Is Expressed In The Formmentioning

confidence: 99%

See 1 more Smart Citation

Two-Rate Based Structures for Computationally Efficient Wide- Band FIR Systems

Johansson¹,

Gustafsson²

2013

Digital Filters and Signal Processing

View full text Add to dashboard Cite

Section: Using the Farrow Structure H(z D) Is Expressed In The Formmentioning

confidence: 99%

“…To meet this specification, the Farrow structure in Fig. 6, with subfilters jointly optimized as outlined in detail in [41], requires 45 fixed multipliers, 88 fixed adders, and 5 variable multipliers. The two-rate based structure in Fig.…”

Section: Example and Comparisonsmentioning

confidence: 99%

Two-Rate Based Structures for Computationally Efficient Wide- Band FIR Systems

Johansson¹,

Gustafsson²

2013

Digital Filters and Signal Processing

View full text Add to dashboard Cite

“…. ., have a higher order as compared to other branches [8]. For even N k , the subfilter S 0 (z) is a pure delay and, then, the subfilters in branches k = 1, 3, .…”

Section: A Contribution Of the Papermentioning

confidence: 99%

“…With linear-phase FIR subfilters, the value of ∆ can be intolerably large due to the strict constraints on some of S k (z) [8]. If…”

Section: A Error Frequency Responsesmentioning

confidence: 99%

Complexity reduction in low-delay farrow-structure-based variable fractional delay FIR filters utilizing linear-phase subfilters

Eghbali

Johansson

2011

2011 20th European Conference on Circuit Theory and Design (ECCTD)

View full text Add to dashboard Cite

Abstract-This paper proposes a method to design low-delay fractional delay (FD) filters, using the Farrow structure. The proposed method employs both linear-phase and nonlinearphase finite-length impulse response (FIR) subfilters. This is in contrast to conventional methods that utilize only nonlinear-phase FIR subfilters. Two design cases are considered. The first case uses nonlinear-phase FIR filters in all branches of the Farrow structure. The second case uses linear-phase FIR filters in every second branch. These branches have milder restrictions on the approximation error. Therefore, even with a reduced order, for these linear-phase FIR filters, the approximation error is not affected. However, the arithmetic complexity, in terms of the number of distinct multiplications, is reduced by an average of 30%. Design examples illustrate the method.

show abstract

“…Generally, S k (z) are designed so that H(z) approximates an allpass transfer function with FD of μ over the frequency range of interest according to Babic et al (2002); Johansson & Hermanowicz (2006); Johansson & Löwenborg (2003); Pun et al (2003);Tseng (2002); Vesma & Saramäki (1996;2000). The desired causal magnitude and unwrapped…”

Section: Sampling Rate Conversion: Farrow Structurementioning

confidence: 99%