多载波卫星非线性信道分析

Analysis of Nonlinear Channel of Multi-carrier Satellite

对卫星的非线性信道进行了详细分析,给出了信道仿真模型,并在此模型基础上分析了多载波信号在非线性信道中的功率回退,及其与调制方式和多载波数的关系,给出在不同系统参数下得到最优功率回退的具体方法。分析结果表明非线性信道所需的功率回退随着调制阶次和载波数的增加而增大。

This paper analyzes nonlinear channel of satellite in detail and puts forward a simulation model. Based on the model, power back-off and its relationship with modulation type and carrier number are analyzed, and as a result, the method of getting optimal power back-off is given under different system parameters. The results show that in the nonlinear channel of satellite, more power back-off is needed with higher order of modulation and greater number of carriers.