Matlab中提供了fft函数,FFT是DFT的快速算法: X=fft(x):用于计算序列x的离散傅里叶变换(DFT) X=fft(x,n):对序列x补零或截短至n点的离散傅里叶变换。
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...来, DennisGabor 于 1946 年提出了短时傅里叶变换(Short Fourier Transform),也称为加窗傅里叶变换(Windowed Fourier Transform)。设)()(2RLxg∈,而且0)()(22≠=∫dxxgxg, 如果∞<⋅∫+∞∞−dxxgx)(2, 则称 g(x)是一个窗函数。
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傅里叶变换 [数] Fourier transform ; Fourier transformation ; FFT ; FT
分数傅里叶变换 fractional Fourier transform ; FRFT ; FRT ; fractional fourier transformation
量子傅里叶变换 Quantum Fourier transform ; FLYBH quantum
离散傅里叶变换矩阵 DFT matrix ; Dftmtx
傅里叶变换红外光谱仪 FT-IR Spectrometer FTIR ; FTIR ; Fourier transform infrared spectrometer
傅里叶变换红外光谱 FTIR ; Fourier transform infrared spectroscopy ; fourier transform infrared spectrum
短时傅里叶变换 STFT ; short-time Fourier transform ; Short Time fourier transformation
傅里叶变换光谱仪 [光] Fourier transform spectrometer ; Fourier transform spectroscopy ; The FTIR-Rocket Infrared Spectrometer
傅里叶变换全息图 fourier transform hologram ; fourier hologram
实运算快速付里叶变换法简称RFT方法。
Real operational fast Fourier transformation is called RFT method for short.
推导出共轭对称序列的快速付里叶变换FFT具有相位为零的特性;
It is derived that the phase of the FFT for a conjugate-symmetric sequence is zero.
对其通过自由空间和付里叶变换系统特殊情况的传输作了分析和讨论。
Free space propagation and Fourier transfer system are also analyzed and discussed as particular cases.
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