Extremely Flat-Top Windows for Harmonic Analysis

Reljin, Irini; Reljin, Branimir; Papić, Vladimir D.

doi:10.1109/tim.2007.894889

Cited by 58 publications

(28 citation statements)

References 21 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The window function received in this way is called constant-length CON window and it is described by Reljin et al [9].…”

Section: Convolution Weighting Function Designmentioning

confidence: 99%

“…One of them is based on convolution operation. To be more precise, there are known methods, such as: time convolution of parent windows, described by Harris [4] and Nuttall [5], multiple time convolution of rectangular windows, described by Wen [6] and Dai and Gretsch [7] or multiple time auto and cross convolution of other well known windows, described by Reljin et al [8,9]. These so called convolution windows have greater sidelobe attenuation and their fast decay.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Modification of raised cosine weighting functions family

Lesnik

Kawalec

Pietrasinski

2009

WIT Transactions on Modelling and Simulation

View full text Add to dashboard Cite

Modification of the known family of raised cosine weighting functions with the power of n by using its convolution operation with an auxiliary rectangular window having variable duration time is considered in the paper. Such a modified functions family was derived in a general and exact form for the defined weighting function in a time and frequency domain as well. It was done with the help of the convolution windows constant -length type preparation technique. The derived weighting function was applied for radar chirp signals synthesis with nonlinear frequency modulation (NLFM). Chosen examples of the simulation research of the discussed modified weighting functions family features and radar signals of NLFM type synthesised thanks to it are presented in the paper.

show abstract

“…The window function received in this way is called constant-length CON window and it is described by Reljin et al [9].…”

Section: Convolution Weighting Function Designmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Modification of raised cosine weighting functions family

Lesnik

Kawalec

Pietrasinski

2009

WIT Transactions on Modelling and Simulation

View full text Add to dashboard Cite

show abstract

“…When computed from a block of data that is non-periodic, this method suffers from influences known as spectral leakage and picket-fence effect [8]. Owing to the existences of the fundamental frequency offset and inter-harmonic, synchronous sampling cannot be achieved [9], which also cannot be avoided by adjusting the sampling frequency by hardware or software [10]. In practice, the windowed interpolation FFT methods [11,12], are the effective methods to accurately recover amplitude, phase, and frequency of spectral components for their simple principles and low hardware requirements.…”

Section: Introductionmentioning

confidence: 99%

Spectral correction method based on improved flat-top convoluted window for parameter estimation of power harmonic

Song

Zhang

2017

Teh. vjesn.

View full text Add to dashboard Cite

Original scientific paper Accurate estimation of harmonic parameter is an important task in signal processing of power system. A new class of flat-top windows is proposed, which is generated by self-convolutions of the fast-decaying minimum-sidelobe flat-top (FDMS-FT) window in the time-domain. The mainlobe and sidelobe features of the new window are studied. In addition, to improve the flatness of mainlobe of the new window, the coefficients of its parent window are optimized. A window-length changeable discrete phase difference correction algorithm based on the new window is presented to estimate power harmonic parameter. In order to inspect the efficiency and accuracy of the presented method, several computer simulations and practical experiments were conducted with power multi-frequency signals. Results show that the proposed method can reduce the computation load efficiently and gives a high parameter estimation accuracy of power harmonic.Keywords: fast Fourier transform; flat-top window; parameter estimation; power system harmonic; spectral correction; spectral leakage Spektralna korekcijska metoda utemeljena na poboljšanom spiralnom podesivom prozoru za procjenu parametara harmonijske snage Izvorni znanstveni članak Točna procjena harmonijskog parametra je važan zadatak u obradi signala elektroenergetskog sustava. Predlaže se nova vrsta flat-top prozora koja se generira vlastitim konvolucijama brzo padajućeg flat-top prozora (FDMS-FT) u domenu vremena. Proučavaju se značajke bočnog i glavnog režnja novog prozora. Nadalje, kako bi se poboljšala glatkoća glavnog režnja novog prozora, optimiziraju se koeficijenti matičnog prozora. Predstavlja se izmjenjivi algoritam ispravke razlike faze duljine prozora baziran na novom prozoru kako bi se procijenio strujni harmonični parametar. Kako bi se provjerila učinkovitost i točnost prikazane metode, provedeno je nekoliko računalnih simulacija i praktičnih eksperimenata s višefrekvencijskim strujnim signalima. Rezultati pokazuju da predložena metoda može učinkovito smanjiti opseg računanja i daje visok parametar točnosti procjene harmonijske snage.

show abstract

“…It is well known that the performance of windowed FFT is mainly determined by the window function [8]. A combination of various window functions are proposed to improve the accuracy of power system harmonic analysis, such as Hanning window, Nuttall window, rectangular self-convolution window, Hanning selfconvolution window and Nuttall self-convolution window interpolation FFT algorithm [9][10][11][12][13][14][15][16][17][18][19]. However, all side-lobe characteristics of the above window functions need to be improved particularly in spectrum leakage inhibition.…”

Section: Introductionmentioning

confidence: 99%

Harmonic analysis based on time domain mutual-multiplication window

Tan

Chen

Liu

et al. 2016

J. Mod. Power Syst. Clean Energy

View full text Add to dashboard Cite

The signal spectral leakage and fence effect are prone to take place during the power harmonic analysis by fast fourier transform (FFT) under asynchronous sampling. The inhibiting ability of classical window functions is restricted by side-lobe behaviors. A new type window function called time domain mutual-multiplication window, is obtained by multiplication operation of several window functions. A novel approach of harmonic analysis is developed through analyzing performances of main-lobe and side-lobe of the new window. Simulation results show that the time domain mutual-multiplication window can significantly suppress frequency spectral leakage and improve the accuracy of harmonic parameter estimation.

show abstract

Extremely Flat-Top Windows for Harmonic Analysis

Cited by 58 publications

References 21 publications

Modification of raised cosine weighting functions family

Modification of raised cosine weighting functions family

Spectral correction method based on improved flat-top convoluted window for parameter estimation of power harmonic

Harmonic analysis based on time domain mutual-multiplication window

Contact Info

Product

Resources

About