The relative waveforms, such as maximum frequency, mean frequency and bandwidth, were obtained using the short time Fourier analysis of those simulated signals.

对这些仿真信号进行短时傅里叶分析，求出相应的最大频率、平均频率和频谱宽度等曲线。

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Real time Fourier analysis is introduced on the basis of traditional Fourier analysis. APF USES a slippage iterative calculation method to suit DSP control system.

在传统傅里叶分析的基础上，给出了一种实时傅里叶分析的方法，并针对DSP控制系统，运用了滑窗迭代的计算方法。

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