基于Nuttall自卷积窗的改进FFT谱分析方法

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Abstract The window with good side lobe behavior is the key factor for the improvement of accuracy of spectral analysis. This paper proposes the Nuttall self-convolution window(NSCW), which is constructed by the self convolution of Nuttall window in time domain. The NSCW has the advantage that its sidelobe behavior is improved rapidly with the increasing of times of self convolution. The Novel spectral analysis based on improved FFT by Nuttall self-convolution window is presented, where the spectral interpolation polynomial is deduced based on the least square method and the calculation of harmonic parameters is then obtained. The effectiveness and correctness of the proposed method are shown by the simulations.

Key words： The self convolution of Nuttall window improved fast fourier transformation(FFT) spectral analysis the least square method interpolation polynomial

Received: 10 July 2013 Published: 05 August 2014

PACS:	TM315
	N911

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	Articles by authors
	Zeng Bo
	Tang Qiu
	Qing Baiyuan
	Wen He
	Li Gang
	Teng Zhaosheng

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Zeng Bo,Tang Qiu,Qing Baiyuan等. Spectral Analysis Method Based on Improved FFT by Nuttall Self-Convolution Window[J]. Transactions of China Electrotechnical Society, 2014, 29(7): 59-65.

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http://dgjsxb.ces-transaction.com/EN/ OR http://dgjsxb.ces-transaction.com/EN/Y2014/V29/I7/59

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