放大器非线性失真的Volterra级数算法研究

Property of based on HPA nonlinear distortion arithmetic of Volterra progression

基于Volterra级数方法,对大功率放大器的非线性失真进行了分析,提出了一种新的Volterra自适应预失真的设计方法及其算法。理论分析和仿真实验结果表明:该算法具有收敛速度快,能有效地减小非线性失真的影响。在输入两音信号时,该算法使放大器的3次失真抑制了13dB左右。

Nonlinear distortion of HPA characteristic based on the method of Volterra progression was analysised,a new idea of design and arithmetic of Volterra digital adaptive predistorting was provided. Theory and simulation test shows this arithmetic algorithm converges fast and effective reduce the effect of nonlinear distortion,the method decreases about 13 dB in third distortion of HPA when conic sign is put.