Optimal equalization for reducing the impact of channel group delay distortion on high-speed backplane data transmission

Zhang, Lei; Kwaśniewski, T.

doi:10.1016/j.aeue.2009.04.010

Cited by 6 publications

(2 citation statements)

References 14 publications

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“…Equation (4) means that the final magnitude response will not be affected by adding the equalizer and will preserve the shape of the magnitude response of the original IIR filter. Equation (5) means that the final group delay is a summation of group delays of both filters.…”

Section: Group Delay Equalizermentioning

confidence: 99%

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An Efficient Method of Group Delay Equalization for Digital IIR Filters

Okoniewski¹,

Piskorowski²

2013

Metrology and Measurement Systems

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The paper presents the equalization problem of non-linear phase response of digital IIR type filters. An improved analytical method of designing a low-order equalizer is presented. The proposed approach is compared with the original method. The genetic algorithm is presented as an iterative method of optimization. The vector and matrix representation of the all-pass equalizer are shown and introduced to the algorithm. The results are compared with the analytical method. In this paper we have also proposed the use of an aging factor and setting the initial population of the genetic algorithm around the solution provided by the analytical methodology.

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Section: Group Delay Equalizermentioning

confidence: 99%

“…Some parts of the losses, especially the marked phase shifts and amplifications, are caused by the intersymbol interference (ISI). The ISI effect is a known consequence of the filter's non-linear phase response [5] or similarly, non-constant group delay.…”

Section: Group Delay Responsementioning

confidence: 99%