论文部分内容阅读
富里哀谱分析方法本讲着重根据富里哀谱分析方法的特点及其存在的主要问题,进一步阐述减少其计算量的快速富里哀变换(FFT)算法,及提高其估计精度的加窗处理等改善方法。1.富里哀谱分析的特点由式(4—23、24)和式(10—10)可知,利用数字计算机进行富里哀谱分析中,难免要进行有限离散富里衰变换(DFT)及其逆变换(IDFT),即作如下的运算:
This method focuses on the characteristics of Fury analysis method and its main problems, and further elaborates the Fast Fourier Transform (FFT) algorithm to reduce its computational complexity and improve its estimation accuracy of windowing and other improvements method. 1. The characteristics of Fuli sad spectrum analysis From (4-23,24) and (10-10) shows that the use of digital computer Fury spectrum analysis, it is inevitable to be limited discrete Fourier transform (DFT) and its inverse Transformation (IDFT), that is for the following operations: