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Extremely flat-top windows for harmonic analysis
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DOI：10.1109/TIM.2007.894889.png)
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摘要
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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.
Keyword:
discrete Fourier transform (DFT)
harmonic analysis
signal processing
spectral leakage
windowing
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期刊
IF:
5.9
论文数:
2.0W
被引数:
5.8W
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