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该文提出了一种基于Pade逼近的谱估计方法。由于Pade逼近能够利用有限项很好地逼近对无限项的求和,文中算法适用于短时序列情况。经过实验仿真并与FFT方法和小波变换谱估计方法进行比较表明,该文算法具有较高的频率分辨率和估计精度,并具有较好的品质因数。
This paper proposes a spectral estimation method based on Pade approximation. Since Pade approximation can well approximate the summation of infinite items by using finite items, the algorithm in this paper is suitable for short-time sequence case. The experimental simulation and comparison with the FFT method and the wavelet transform spectrum estimation method show that the proposed algorithm has high frequency resolution and accuracy, and has better quality factor.