The spectrum of amplitude modulated signal are two half magnitude spectrums of base band signal positive and negative shifted by a carrier or R. F. frequency.
调幅讯号之频谱为一半强度基频讯号之频谱分别正负位移一射频或载波之频率。
Firstly, in order to reduced the computational complexity, the magnitude spectrum of CW is divided into basic matrix, transitional matrix and supplemental matrix.
首先，为了降低计算复杂度，将CW的幅度谱分块处理，分成基本矩阵、过渡矩阵和补充矩阵。
Both seismological theory and macroseismic observation show that the shape of strong motion response spectrum depends mainly on magnitude, distance of epicenter and engineering site condition.
地震学理论和强震观测都表明，强震反应谱的形状主要取决于震级、震中距和场地条件。
Spectrum magnitude of an earthquake is an important source parameter of earthquake size in seismology research.
谱震级是表征地震强弱的量度，是地震学研究中的一个重要的地震参数。
The algorithm is verified by experiments and the modulator can produce digital modulation signals with good EVM(Error Vector Magnitude) and spectrum mask.
通过验证，所产生的调制信号具有良好的误差向量幅度（EVM）和频谱特征。
Because it is related to the magnitude of noise RMS voltage, the frequency characteristic of circuit and the power spectrum of noise source, the accuracy of measurement is quite low.
但由于与噪声电压的大小，网络频率特性及噪声源功率谱形式有关，故测量准确度较低。
Spectrum magnitude is often related to the seismic prediction that is crucial in the study of seismic engineering.
在地震预测和工程地震研究中具有重要的实际意义。
Spectrum magnitude is often related to the seismic prediction that is crucial in the study of seismic engineering.
在地震预测和工程地震研究中具有重要的实际意义。
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