By extracting the instantaneous amplitude, phase and frequency, and computing the very amplitude variance, mean frequency and phase variance, the modulation mode can be identified, compared to the gate value, and so does the multiple-amplitude-levels using the features.
对信号解调采用模式识别的方法:即通过提取信号的瞬时幅度、瞬时相位和瞬时频率来计算相应的幅度方差、平均频率和相位方差,根据门限值可以将信号调制类型识别出来,进而可根据提取的特征值识别出信号的进制数。
参考来源 - 基于LabWindows/CVI的数字信号分析研究However under the same conditions,the steady value of the mean frequency of MNLS soltions is closer to the initial mean frequency and the result of numerical simulation.
有所不同的是，宽度为飞秒量级下，MNLS孤子平均频率的稳定值更接近初始平均频率，更接近数值计算结果。
参考来源 - 光纤飞秒孤子传输的拉曼自频移研究·2,447,543篇论文数据，部分数据来源于NoteExpress
The mean frequency of positive IHA test for the suslik was 13.74%.
黄鼠间接血凝试验的平均阳性率为13.74％。
The mean frequency synthesizer which usesfrequency divider given here is successfully used in the B …
文中给出的分频法平均频率合成器已成功地用于作者所设计的B超仪中。
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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