文件名称：功率控制-华为CDMA2000
文件大小：3.95MB
文件格式：PPT
更新时间：2024-05-13 05:52:01
cdma
功率控制 反向功率控制 开环功率控制 闭环功率控制 内环功率控制: 800 Hz 外环功率控制 前向功率控制 基于测量报告的功率控制 门限方式 周期方式 闭环功率控制 . CDMA 核心技术 Reverse open loop power control means that based on the detected signals from a base station, a mobile station makes a preliminary judgement of the attenuation of an air path and specifies what transmitting power should be used to transmit signals. If the mobile station receives strong signals, it shows there is weak air attenuation and the mobile station transmits signals at a smaller power. If the mobile station receives weak signals, it shows there exists strong air attenuation and the mobile station will transmit signals at a greater power. Reverse closed loop power control means that after receiving a signal from a mobile station , a base station will judge its strength. If the signal is higher than the threshold needed by the base station, the base station sends an instruction that the mobile station should decrease the transmitting power. If the signal is lower than the threshold needed by the base station, the base station sends an instruction that the mobile station should increase its transmitting power. Forward power control is similar to reverse power control, but the former controls the signals a base station transmits to various users.