receiving and transmitting equipment 中文意思是什麼
receiving and transmitting equipment
解釋
接收和發射設備-
It mainly includes two parts : the frequency offset caused by the difference of the mobile equipment ’ s transmitting frequency and the nodeb ’ s receiving frequency ; the frequency offset caused by the vehicle of the mobile equipment, which is called doppler shift. accurate frequency offset estimation and compensation is of importance for demodulation
它主要由兩部分構成:由於nodeb (基站)和移動臺晶振本振頻率的不同而產生頻偏;由於移動臺運動產生多普勒效應,引起的多普勒頻偏,在信號功率譜上表現為多普勒頻譜擴展(以後簡稱多普勒擴展) 。
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