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Metrology and Measurement Systems
The Journal of Committee on Metrology and Scientific Instrumentation of Polish Academy of Sciences
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IMPACT FACTOR increased in 2015: 1.140
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An Efficient Method of Group Delay Equalization for Digital IIR Filters
- West Pomeranian University of Technology, Faculty of Electrical Engineering, ul. Sikorskiego 37, 70-313 Szczecin, Poland
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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