自相关函数是一个偶函数。

The autocorrelation function is an even function.

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如果信号振荡，该信号的自相关函数也振荡。

Once a signal is oscillatory, its autocorrelation is also oscillatory.

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如果信号振荡，该信号的自相关函数也振荡。

Once a signal is oscillatory, its autocorrelation is also oscillatory.

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