改进的功率校准算法

Modified method of power amplifier adjustment

研究了移动通信系统中非线性功率放大器的输入电压、负载阻抗输入电压与天线输出功率之间关系,尤其利用负载阻抗输入电压与天线输出功率之间非线性特性,采用线性插值算法基本原理,对功率放大器的输入电压与负载阻抗输入电压进行分段直线拟合,获得功率放大器输入电压与天线输出功率之间的一一对应关系。采用本文所述方法在工程中对天线输出功率进行校准,不但缩短了功率校准所需时间,而且提高了功率校准精度。

This paper researches nonlinear power amplifier based on mobile communication system,especially the relationship among the input voltage of power amplifier（ PA）,the input voltage of load impedance and the output power of the radio frequency（ RF）,especially the nonlinear relationship between the input voltage of load impedance and the output power of the RF. Using the linear interpolation principle,linear fitting for each short line between the input voltage of PA and the input voltage of load impedance,we can get the one to one relationship according to the input voltage of PA and the output power of the RF. We can adjust exactly the output power of the radio frequency for practical application using the above method,and the power adjustment process needs less time,the precision of the power adjustment can be improved.