Local polynomial approximation of the instantaneous frequency: Asymptotic accuracy
Local polynomial approximation of the instantaneous frequency: Asymptotic accuracy
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DOI：
10.1016/0165-1684(96)00069-2
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发表时间：
1996-08
期刊：
影响因子：
--
通讯作者：
V. Katkovnik
中科院分区：
文献类型：
--
作者：
V. Katkovnik
时变相位的局部多项式近似用于估计复谐波信号的瞬时频率及其导数。所考虑的估计是高阶推广的短时傅立叶变换和Wigner-Ville分布。为了评估算法的精度和跟踪能力，得到了估计的渐近方差和偏差。对算法进行了比较研究。
The local polynomial approximation of the time-varying phase is used in order to estimate the instantaneous frequency and its derivatives for a case of a complex harmonic signal. The considered estimators are high-order generalization of the short-time Fourier transform and the Wigner-Ville distribution. The asymptotic variance and bias of the estimates are obtained in order to evaluate the accuracy and the tracking ability of the algorithms. The comparative study of the algorithms is presented.