基于Nuttall自卷积窗的改进FFT谱分析方法
发布时间：2019-08-03 19:38
【摘要】：建立性能优良的窗函数是提高频谱分析准确度的关键。本文用Nuttall窗进行时域卷积运算构建Nuttall自卷积窗,具有旁瓣性能随卷积次数增加而迅速提升的优点;提出基于Nuttall自卷积窗的改进FFT谱分析方法,采用最小二乘法推导离散频谱插值多项式,建立谐波参数准确求解算法;通过仿真实验验证Nuttall自卷积窗及改进FFT谱分析方法的有效性和准确性。
[Abstract]:The establishment of window function with excellent performance is the key to improve the accuracy of spectrum analysis. In this paper, the time domain convolution operation of Nuttall window is used to construct Nuttall self-convolution window, which has the advantage of rapid improvement of sidelobe performance with the increase of convolution times. An improved FFT spectrum analysis method based on Nuttall self-convolution window is proposed, the discrete spectrum interpolation polynomial is deduced by the least square method, and the accurate algorithm for solving harmonic parameters is established. The effectiveness and accuracy of the Nuttall self-convolution window and the improved FFT spectrum analysis method are verified by simulation experiments.
【作者单位】： 广西电网公司电力科学研究院;湖南大学电气与信息工程学院;
【基金】：国家自然科学基金资助项目(51277058)
【分类号】：TM935
[Abstract]:The establishment of window function with excellent performance is the key to improve the accuracy of spectrum analysis. In this paper, the time domain convolution operation of Nuttall window is used to construct Nuttall self-convolution window, which has the advantage of rapid improvement of sidelobe performance with the increase of convolution times. An improved FFT spectrum analysis method based on Nuttall self-convolution window is proposed, the discrete spectrum interpolation polynomial is deduced by the least square method, and the accurate algorithm for solving harmonic parameters is established. The effectiveness and accuracy of the Nuttall self-convolution window and the improved FFT spectrum analysis method are verified by simulation experiments.
【作者单位】： 广西电网公司电力科学研究院;湖南大学电气与信息工程学院;
【基金】：国家自然科学基金资助项目(51277058)
【分类号】：TM935
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