FFT is a mathematical tool commonly used in digital signal processing, and is characterized by fast operational speed and low SNR threshold value.

快速傅里叶变换是数字信号处理的常用数学工具，以运算速度快和信噪比阈值低为特点。

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FFT is a very important algorithm in digital signal processing, and butterfly operation modules are important construction modules in FFT processor.

FFT是数字信号处理中的一种非常重要的算法，蝶形运算模块是FFT处理其中的重要构造模块。

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The standard method for spectrum analysis in digital signal processing is the discrete Fourier transform(DFT), typically implemented using a fast Fourier transform(FFT) algorithm.

数字信号处理中标准的频谱分析方法是离散傅立叶变换（DFT），典型的实现方法是快速傅立叶变换（FFT）。

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