Abstract: An improved radix-16 decimation-in-frequency (DIF) FFT algorithm is proposed by introducing new indices for some of the output sub-sequences resulting from the conventional radix-16 DIF ...
给定一个离散的实数序列$x[n]$，我们可以用DFT得到一个离散的频谱(spectrum)$X[k]$，其中频谱第$k$个点计算公式为： $$ F[k]=\sum_{n=0 ...
The Fast Fourier Transform (FFT) is a widely used algorithm that computes the Discrete Fourier Transform (DFT) using much fewer operations than a direct implementation of the DFT. FFTs are of great ...
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