傅里叶变换(FFT)就相当于把这首歌拆分成一个个不同音高(频率)的音符。每个音符的响度(振幅)和音色(相位)都代表了原信号在对应频率上的特征。 tsfresh是一个专门用来提取时间序列特征的工具库。 fft_coefficient就是这个工具库中用来计算这些“音符”特征的函数。 更具体地说: fft_coefficient函数会对你的股票价格...
FFT coefficient errorsthe impulse responsessignal-flow graphstransfer functionserroneous low-pass filtersA novel, deterministic approach towards the analysis of coefficient errors in DFT and FFT was proposed, recently [9]. In this paper, its application is described: After a short introduction into ...
FourierTransform.FFT(conj, FourierTransform.Direction.Backward);returnconj; }staticdoubleCorrelationCoefficient(Complex[] ffta, Complex[] fftb){varcorrelation = CrossCorrelation(ffta, fftb);vara = CrossCorrelation(ffta, ffta);varb = CrossCorrelation(fftb, fftb);// Not sure if this part is correct....
A recent deterministic description of DFT and FFT coefficient errors (due to a fixed-point representation) is applied to describe the resulting frequency-response errors in the channels of a polyphase filter bank, realized by a subfilter network and a DFT. A theory is developed, verified by ...
In this paper, the principle of finding the optimized coefficient set of integer fast Fourier transform (IntFFT) is introduced. IntFFT has been regarded as an approximation of original FFT since it utilizes lifting scheme (LS) and decomposes the complex multiplication of twiddle factor into three...
Wang, LingZhang, WeiZhang, Zeng-pingLiu, Yuan-anSpringer Berlin HeidelbergMicrosystem TechnologiesL Wang, W Zhang, Z P Zhang, et al. Spinning frequency estimation algorithm of MEMS gyro's output signal based on FFT coefficient. Microsystem Technologies, 1-5(2017)...
Arslan, " Coefficient memory addressing scheme for high performance FFT processors, " Electronics Letters, vol. 37, No. 22, pp. 1322-1324, 2001.Hasan, M.; Arslan, T. "Coefficients memory addressing scheme for high performance processors" Electronic let- ters. Vol. 37, No. 22. Oct. 2001...
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simulating the elastoplastic contact between nominally flat surfaces of materials containing inhomogeneities or coatings is developed via extending the concept of the discrete convolution and FFT (DC–FFT) algorithm with double superpositions of influence coefficients, which is named the DCSS–FFT algorithm...
Case Study: Coefficient Training in Paley-Wiener Space, FFT, and Wavelet Theorydoi:10.5772/intechopen.94865Patrick Kikodio