Analysis of the Exponential Signal by the Interpolated DFT Algorithm
Analysis of the Exponential Signal by the Interpolated DFT Algorithm
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DOI：
10.1109/tim.2010.2047301
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发表时间：
2010-12-01
影响因子：
5.6
通讯作者：
Chiang, Ching-Tai
中科院分区：
文献类型：
--
作者：
Wu, Rong-Ching;Chiang, Ching-Tai
在本文中，指数信号在频域中的准确分析的算法，并采用离散傅里叶变换（DFT）结果的峰值，以获得参数，包括振幅，频率，阻尼，和相位。该算法分为插值DFT和泄漏消除两个步骤。插值DFT是指在每个模式的峰值处的三条相邻谱线用于计算近似结果，泄漏消除的目的是消除泄漏对这些数据的影响。经过迭代，该算法将获得准确的参数的指数分量，从他们的DFT结果。本文还对各种算法进行了比较。
In this paper, exponential signals in the frequency domain are accurately analyzed by an algorithm, and the peaks of the discrete Fourier transform (DFT) result are adopted to obtain parameters that include amplitudes, frequencies, dampings, and phases. There are two steps for this algorithm: interpolated DFT and leakage elimination. Interpolated DFT refers to the three neighboring spectral lines at the peak of each mode used to calculate an approximate result, with the purpose of leakage elimination being to eliminate the influence of leakage on these data. After some iteration, this algorithm will obtain accurate parameters of the exponential components that are derived from their DFT results. The comparison of different algorithms is also discussed in this paper.