Bi-Minimax Design of Even-Order Variable Fractional-Delay FIR Digital Filters

Deng, Tian-Bo; Chivapreecha, Sorawat; Dejhan, Kobchai

doi:10.1109/tcsi.2011.2180431

Cited by 48 publications

(19 citation statements)

References 31 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The VFD filter not only can achieve the high precision fractional sampling delay, but also change the delay flexibility [13,14]. Meanwhile, the group delay of VFD filter in array simulator plays an important role, but most design methods use variable frequency response criterion to optimize the performance of VFD filters [15][16][17][18]. With the group delay smaller, a novel VFD filter design method in group delay minimax sense is also proposed in this paper.…”

Section: Introductionmentioning

confidence: 99%

A High-Precision and Flexible Array Antenna Signal Simulator Based on VFD Filter

Sha

Han²,

Zhang

2015

China Satellite Navigation Conference (CSNC) 2015 Proceedings: Volume I

View full text Add to dashboard Cite

An array antenna signal simulator based on VFD filter is presented. To offer the design structure and make delay control more flexible, the VFD filter, which is suitable for changing the delay time, is used to control the delay of different channels. To improve the group delay precision of VFD filter, a design method in group delay minimax sense is proposed, instead of the variable frequency response criterion. The experimental results indicate that, in the DOA simulation, the elevation simulation accuracy of the new designed array simulator is better than 2°, the azimuth simulation accuracy is better than 1°.

show abstract

Section: Introductionmentioning

confidence: 99%

A High-Precision and Flexible Array Antenna Signal Simulator Based on VFD Filter

Sha

Han²,

Zhang

2015

China Satellite Navigation Conference (CSNC) 2015 Proceedings: Volume I

View full text Add to dashboard Cite

show abstract

“…For the AP type, only the phase response needs to be considered because the AP type has unity gain at all frequencies [2], [3], which facilitaes the design. Such unity-magnitude characteristics have also been employed for designing variable fractional-delay filters [4]- [8], which are very useful in various signal processing fields [9]- [15]. However, since the phase response of the AP type is highly non-linear with respect to the its coefficients, the phase-approximation problem is a non-linear fitting problem.…”

Section: Introductionmentioning

confidence: 99%

High-accuracy phase-equalization filter design using iterative linear-programming technique

Itô

2014

2014 11th International Conference on Electrical Engineering/Electronics, Computer, Telecommunications and Information Technolo

View full text Add to dashboard Cite

In digital communications, non-linear phase channels are equalized by using a phase-equalization filter such that the whole phase responses of the communication channels are linear and the signal waveforms are not distorted after the transmission. This paper presents an iterative linear-programming (LP) technique for designing an all-pass (AP) phase-equalization filter such that its phase response fits a given ideal phase response in the minimax error sense. The AP phase-equalization filter design is formulated as an iterative LP problem and the optimal coefficients of the digital AP system are found through iteratively solving the LP problems. As compared with the existing LP design and the second-order-cone programming (SOCP)-based design, the proposed iterative LP design method achieves much more accurate fitting. We will use a design example to demonstrate the performance improvement.

show abstract

“…Variable digital filters can be applied in signal processing applications on-line without redesigning a new filter [1]- [10]. When a new frequency characteristic is necessary, the new coefficients can be instantly obtained such that a user can instantly get the desired new frequency response.…”

Section: Introductionmentioning

confidence: 99%

Weighted least-squares design of variable recursive digital filters with guaranteed stability

Deng

Chivapreecha

Dejhan

2013

2013 13th International Symposium on Communications and Information Technologies (ISCIT)

Self Cite

View full text Add to dashboard Cite

The stability guarantee is the most important issue in designing variable infinite-impulse-response (IIR) digital filters. This paper presents a new variable substitution method for transforming the denominator coefficients of a variable-IIRfilter into another set of variables such that arbitrary values of the new variables can guarantee the stability of the resulting variable-IIR-filter. That is, the design problem subject to stability guarantee (constrained non-linear design problem) is converted into an unconstrained design problem. As a consequence, the resulting variable-IIR-filters are always guaranteed theoretically. A lowpass variable-IIR-filter design example is given to illustrate the effectiveness of the design formulation.

show abstract

Bi-Minimax Design of Even-Order Variable Fractional-Delay FIR Digital Filters

Cited by 48 publications

References 31 publications

A High-Precision and Flexible Array Antenna Signal Simulator Based on VFD Filter

A High-Precision and Flexible Array Antenna Signal Simulator Based on VFD Filter

High-accuracy phase-equalization filter design using iterative linear-programming technique

Weighted least-squares design of variable recursive digital filters with guaranteed stability

Contact Info

Product

Resources

About