Constrained-group-delay-optimized multiple-resonator-based harmonic analysis
Abstract
Recently, a multiple-resonator structure was proposed as a robust and computationally efficient tool for harmonic analysis. Two trivial cases have been previously observed. The first case exhibits good out-of-band suppression and elimination of unwanted harmonics, but with a high latency. In the second case, a phase frequency response around the passband centre is zero-flat, that provides fast estimates. However, in this case, resonant peaks at the ends of the passband and high interharmonic gains cause large overshoots. In general, the basic algorithm performance requirements: selectivity and speed, are contradictory which makes it impossible to completely fulfil both of them. In this paper, the Constrained Linear Least-Squares (CLLS) optimization method is used to obtain a compromise solution. As a result, the resonant peaks in the passband are avoided and side lobes are mitigated, simultaneously minimizing the group delay in the middle of the passband. Performed simulations confirme...d the effectiveness of the proposed algorithm.
Keywords:
Constrained Linear Least-Squares (CLLS) / Frequency response / Group delay / Harmonic analysis / Multiple-resonator / Recursive algorithmSource:
Tehnički Vjesnik, 2021, 28, 4, 1244-1252Publisher:
- Slavonski Brod: Strojarski fakultet
DOI: 10.17559/TV-20180327173716
ISSN: 1330-3651; 1848-6339
WoS: 000675891000023
Scopus: 2-s2.0-85111557348
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IHTMTY - JOUR AU - Kušljević, Miodrag D. AU - Tomić, Josif J. AU - Poljak, Predrag PY - 2021 UR - https://cer.ihtm.bg.ac.rs/handle/123456789/4776 AB - Recently, a multiple-resonator structure was proposed as a robust and computationally efficient tool for harmonic analysis. Two trivial cases have been previously observed. The first case exhibits good out-of-band suppression and elimination of unwanted harmonics, but with a high latency. In the second case, a phase frequency response around the passband centre is zero-flat, that provides fast estimates. However, in this case, resonant peaks at the ends of the passband and high interharmonic gains cause large overshoots. In general, the basic algorithm performance requirements: selectivity and speed, are contradictory which makes it impossible to completely fulfil both of them. In this paper, the Constrained Linear Least-Squares (CLLS) optimization method is used to obtain a compromise solution. As a result, the resonant peaks in the passband are avoided and side lobes are mitigated, simultaneously minimizing the group delay in the middle of the passband. Performed simulations confirmed the effectiveness of the proposed algorithm. PB - Slavonski Brod: Strojarski fakultet T2 - Tehnički Vjesnik T1 - Constrained-group-delay-optimized multiple-resonator-based harmonic analysis VL - 28 IS - 4 SP - 1244 EP - 1252 DO - 10.17559/TV-20180327173716 ER -
@article{ author = "Kušljević, Miodrag D. and Tomić, Josif J. and Poljak, Predrag", year = "2021", abstract = "Recently, a multiple-resonator structure was proposed as a robust and computationally efficient tool for harmonic analysis. Two trivial cases have been previously observed. The first case exhibits good out-of-band suppression and elimination of unwanted harmonics, but with a high latency. In the second case, a phase frequency response around the passband centre is zero-flat, that provides fast estimates. However, in this case, resonant peaks at the ends of the passband and high interharmonic gains cause large overshoots. In general, the basic algorithm performance requirements: selectivity and speed, are contradictory which makes it impossible to completely fulfil both of them. In this paper, the Constrained Linear Least-Squares (CLLS) optimization method is used to obtain a compromise solution. As a result, the resonant peaks in the passband are avoided and side lobes are mitigated, simultaneously minimizing the group delay in the middle of the passband. Performed simulations confirmed the effectiveness of the proposed algorithm.", publisher = "Slavonski Brod: Strojarski fakultet", journal = "Tehnički Vjesnik", title = "Constrained-group-delay-optimized multiple-resonator-based harmonic analysis", volume = "28", number = "4", pages = "1244-1252", doi = "10.17559/TV-20180327173716" }
Kušljević, M. D., Tomić, J. J.,& Poljak, P.. (2021). Constrained-group-delay-optimized multiple-resonator-based harmonic analysis. in Tehnički Vjesnik Slavonski Brod: Strojarski fakultet., 28(4), 1244-1252. https://doi.org/10.17559/TV-20180327173716
Kušljević MD, Tomić JJ, Poljak P. Constrained-group-delay-optimized multiple-resonator-based harmonic analysis. in Tehnički Vjesnik. 2021;28(4):1244-1252. doi:10.17559/TV-20180327173716 .
Kušljević, Miodrag D., Tomić, Josif J., Poljak, Predrag, "Constrained-group-delay-optimized multiple-resonator-based harmonic analysis" in Tehnički Vjesnik, 28, no. 4 (2021):1244-1252, https://doi.org/10.17559/TV-20180327173716 . .