本文证明了时间域内的平稳相关序列经离散傅里叶变换之后，听得到的是频域内的正交随机序列。

This paper proved that a frequency stochastic sequence obtained from a stationarily correlated time series by using discrete Fourier transform is orthogonal.

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本文首先对傅立叶变换的性质做了详细介绍，其中包括离散傅里叶变换，快速傅立叶变换（FFT）以及基-2按时间抽取（DIT）的FFT算法；

Firstly , the properties of Fourier Transform, including discrete Fourier Transform, FFT and based-2 DIT FFT, are introduced in this paper;

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本文首先对傅立叶变换的性质做了详细介绍，其中包括离散傅里叶变换，快速傅立叶变换（FFT）以及基-2按时间抽取（DIT）的FFT算法；

Firstly , the properties of Fourier Transform, including discrete Fourier Transform, FFT and based-2 DIT FFT, are introduced in this paper;

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