摘要
作者在参考文献[1]中提出了一种连续傅里叶变换的近似算法(WFFT),本文将WFFT的抛物线法应用于倒谱估计,减小了因信号离散化所带来的频谱失真,提高了估计精度。由于本算法仍可借助于FFT做傅氏变换,因而保留了FFT速度快的特点。文中进行了仿真计算,并与其它算法做了比较。
An approximate algorithm (WFFF) for Fourier transform has been established by the author in Ref.[1]. The Simpson's method of WFFT is used to estimate the cepslnim and thus a new algorithm for cepstrum estimation is formed in this paper. The distortion of spectrum created by the discrete-time signal is decreased and hence the accuracy of estimation is increased. This algorithm has also kept the characteristics of fast algorithm FFT because the FFT algorithm is used in the computation of Fourier transform. The simulation computation and the comparison of the paper's algorithm with other algorithm have been done in this paper.
出处
《北京航空航天大学学报》
EI
CAS
1986年第3期1-6,共6页
Journal of Beijing University of Aeronautics and Astronautics
