例如，让我们考虑一下正弦波，也即正弦曲线这样一个描述平稳反复振荡的数学函数。

For instance, let's consider the sine wave, or sinusoid, a mathematical function that describes a smooth repetitive oscillation.

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文中利用对称相关函数理论，分析了抵消平稳随机过程中与信号不相关的加性随机噪声的机理，并应用于线谱信号检测。

The theory of symmetrical function is used to suppress additive stationary random noise; assumption is that the signal and the noise are mutually uncorrelated.

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这个问题来自平稳随机序列的相关函数。

This problem arises from the correlation functions of stationary stochastic sequences.

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