电测与仪表2016，Vol.53Issue(14)：22-27,6.
基于四项最低旁瓣 Nuttall 窗的插值 FFT 谐波分析
Harmonic analysis of interpolation FFT algorithm based on 4-term minimum sidelobe Nuttall window
摘要
Abstract
There is frequency leakage in situation of non-synchronized sampling and non-integer cycle truncation for fast Fourier transform ( FFT) and the high measurement accuracy of harmonic parameters can not be detected .To re-duce the influence of non-synchronized sampling on FFT , this paper adopts harmonic analysis using the 4-term mini-mum sidelobe Nuttall window combined with double-spectrum-line interpolation FFT algorithm .The spectral character-istics of 4-term minimum sidelobe Nuttall window are analyzed in this paper and an algorithm based on 4-term mini-mum sidelobe Nuttall window interpolation FFT has been proposed .The applicable formulas are obtained by fitting of polynomials .The simulation results show that the algorithm has a better detection precision than Blackman window and Blackman-Harris window interpolation FFT algorithms in non-synchronized sampling which will control the spectral leakage more efficiently .关键词
非同步采样/频谱泄漏/谐波分析/四项最低旁瓣Nuttall窗/多项式拟合Key words
non-synchronized sampling/spectral leakage/harmonic analysis/4-term minimum sidelobe Nuttall win-dow/polynomial fitting分类
信息技术与安全科学引用本文复制引用
李得民,何怡刚..基于四项最低旁瓣 Nuttall 窗的插值 FFT 谐波分析[J].电测与仪表,2016,53(14):22-27,6.基金项目
国家杰出青年科学基金（50925727）；国防科技计划项目（C1120110004、9140A27020211DZ5102）；教育部科学技术研究重大项目（313018）；安徽省科技计划重点项目 （）
