基于波峰因子衰减与数字预失真的功放线性化技术

Lineration of Power Amplifer Based on Crest Factor Reduction and Digital Predistortion

研究了峰均比抑制技术和数字预失真的联合设计及加入峰均比抑制技术后的增益控制问题,并给出了相应的峰值限幅算法和自适应的预失真算法,提出了平均功率调整和增益控制的结构和实现方法.仿真结果表明联合设计方案能够很好地补偿功放的非线性和记忆性,而且信号的带内失真得到了明显的改善,带外扩散也得到相应地抑制.

This paper researches the joint design of crest factor reduction（CFR） and digital predistortion,presents the crest factor reduction and adaptive digital predistortion（DPD） algorithms,and proposes the expected gain control and average power adjustment methods.Simulation results show that the algorithms can well compensate the nonlinear and memory effects of power amplifier（PA）,improves the in-band signal distortion,suppress the spectral regrowth,enhance the efficiency of PA.