离散付里叶变换 Discrete Fourier transform ; DTFO
快速付里叶变换 Fast Fourier transform
付里叶变换红外光谱仪 Infrared Fourier Transform Spectrometer ; FTIR
联合付里叶变换 joint fourier transform
快速自适应付里叶变换 fast adaptive Fourier transform
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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