科研之友
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摘要
A new structure of the combined PAPR reduction and digital predistortion is proposed.Joint mapping method and pressure expansion transform are used as the PAPR reduction algorithm,which can lower power amplifier input signal PAPR,avoid power amplifier working in the saturated zone,and improve the efficiency of power amplitier.In order to improve the convergence rate of the joint structure,the adaptive LS-LMS algorithm is put forward,and the memory polynomial model is applied to the predistortion indirect learning structure.Simulation results show that the joint PAPR reduction of adaptive digital predistortion is superior to the single adaptive digital predistortion,it can effectively eliminate the nonlinear distortion caused by high PAPR signal through amplifier saturation zone.
- 出版日期2017
- 单位湖南大学
