The algorithm is verified by experiments and the modulator can produce digital modulation signals with good EVM(Error Vector Magnitude) and spectrummask.
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。
2
UWB signals and their power spectrummask are important factors which need to be considered when studying the spectrum coexisting and compatible problems between UWB systems and other radio systems.
The precise size filter is deposited with the mask method successfully, the spectrum characteristic is tested through utilizing the optical fibre spectrometer.