首先是瞬时频率的估计问题。
Firstly the estimation of instantaneous frequency is discussed.
该文研究了应用WVD谱峰检测估计AM - FM信号的瞬时频率的方法及其性能。
In the paper, the method to estimate instantaneous frequency of AM-FM signals using the peak of the WVD and its performances are studied.
研究瞬时频率的估计方法具有重要的理论意义和实用价值。
So the research about its methods to estimate will be valuable in theory and practice.
该方法通过一个改进锁相环系统实时跟踪输入信号的基波瞬时相位，输出基波瞬时角频率，进而得到输入信号的基本频率估计。
The PLL system could obtain basic component of the input, track the instantaneous phase of basic component, and output instantaneous Angle frequency.
该方法通过一个改进锁相环系统实时跟踪输入信号的基波瞬时相位，输出基波瞬时角频率，进而得到输入信号的基本频率估计。
The PLL system could obtain basic component of the input, track the instantaneous phase of basic component, and output instantaneous Angle frequency.
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