Extremely flat-top windows for harmonic analysis

被引：70

作者：

Rejin, Irini S. ^{[1
]}

Reljin, Branimir D. ^{[1
]}

Papic, Veljko D. ^{[1
]}

机构：

[1] Univ Belgrade, Fac Elect Engn, Belgrade 11120, Serbia

来源：

IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT | 2007年 / 56卷 / 03期

关键词：

discrete Fourier transform (DFT); harmonic analysis; signal processing; spectral leakage; windowing;

D O I：

10.1109/TIM.2007.894889

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 [电气工程]; 0809 [电子科学与技术];

摘要：

The window class, which is generated by multiple time-convolution of weighted-cosine windows, is presented. It is shown that after a convolution of known parent windows, the resultant convoluted (CON) window exhibits high side-lobe attenuation that is capable of suppressing long-range leakage. Moreover, using the expressions describing an error due to the short-range leakage, the optimization procedure was applied to adjust the coefficients of parent windows in order to obtain, as flat as possible, the main lobe of the CON window. As a result, the new window class having both an extremely flat-top (EFT) main lobe and high side-lobe attenuation was generated. Moreover, new windows exhibit faster decaying side lobes than parent windows. The efficiency of EFT windows in high-accuracy harmonic analysis was demonstrated through computer simulations.

引用

页码：1025 / 1041

页数：17

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