幅度谱英文

幅度谱是正的。幅度谱就是信号幅度和频率（角频率）曲线。在信号的频域描述中，以频率作为自变量，以组成信号的各个频率成分的幅值作为因变量，这样的频率函数称为幅值谱，它表征信号的幅值随频率的分布情况。对于随机信号的频域描述，常使用功率谱，它是表征信号的能量随着频率的分布情况。当然，功率谱也可用于周期信号和瞬变信号的频域描述。周期函数的幅值谱：一般周期信号均由一个直流分量、一个基波(正弦波)和无限个谐波(正弦波)所组成，各次谐波的频率是基波频率的整数倍，基波、各次谐波的幅值Ao和初相角是各不相同的，将幅值与频率的函数关系成为幅值谱。

差不多是这样的With the virtual instrument technology, the hardware can be limited under the condition of equipment using a second software development, design, testing needs to adapt to a variety of virtual instruments to enhance the use of equipment performance. Based on the Labview development environment, the use of virtual instrument technology, spectrum analyzer designed to achieve the basic functions of the spectrum analyzer, which signal acquisition and spectral analysis. Among them, the spectral analysis including amplitude spectrum, phase spectrum, power spectrum. The system is PC, as the hardware development platform in an attempt to culture Labview programming language for software development platform, the virtual instrument technology to the spectrum analyzer to enhance the function of the instrument, the instrument saves development time.................

傅里叶变换后的序列为f(w)=|f(w)|*e(j*f(w))其中|f(w)|与w的关系就是幅度谱，f(w)与w的关系就是相位谱，不知道明白了没