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本文从系统设计的角度介绍了离散富里叶交换和快速富里叶交换。对几种解释作了说明。介绍了系统设计中应用快速富里叶变换进行频谱分析的实例。
This paper introduces discrete Fourier transform and fast Fourier transform from the perspective of system design. Explained several explanations. An example of spectrum analysis using Fast Fourier Transform in system design is introduced.