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。
UWB signals and their power spectrum mask are important factors which need to be considered when studying the spectrum coexisting and compatible problems between UWB systems and other radio systems.
超宽带(uwb)信号及其功率谱分布是研究超宽带通信系统与其它通信系统频谱共存与兼容问题时，需要考虑的重要因素。
The precise size filter is deposited with the mask method successfully, the spectrum characteristic is tested through utilizing the optical fibre spectrometer.
通过采用光学掩膜的方法成功制备了符合设计尺寸要求的可见光滤光片，并利用光纤光谱仪测试了滤光片的光谱特性。
The resulting spectrum must fall below the mask line in all places.
所得频谱必定降到所有位置的遮罩线位置以下。
Therefore, it is intensity required that unite the pulse design with antenna, so that the spectrum of radiation pulse which radiation by antenna will meet the requirement of FCC mask.
因此必须联合天线与脉冲信号设计，才能使辐射脉冲信号满足FCC频谱规划要求。
Therefore, it is intensity required that unite the pulse design with antenna, so that the spectrum of radiation pulse which radiation by antenna will meet the requirement of FCC mask.
因此必须联合天线与脉冲信号设计，才能使辐射脉冲信号满足FCC频谱规划要求。
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