计算机工程与科学2017，Vol.39Issue(11)：2043-2048,6.DOI:10.3969/j.issn.1007-130X.2017.11.011
基于分段线性函数的功放模型及数字预失真应用
A power amplifier model based on piecewise-linear functions and digital predistortion application
贾冰 1赵宇 1刘开华 1马永涛 1刘彦北1
作者信息
- 1. 天津大学电子信息工程学院,天津300072
- 折叠
摘要
Abstract
Digital predistortion (DPD) becomes the most attractive technique in overcoming the nonlinearity and memory effects of power amplifiers (PAs) in communication systems.We propose a piecewise-linear memory polynomial (PWL-MP) model for DPD technique.Different from the generalized memory polynomial (GMP) model,our model converts the mulitplication of high order terms to the summation of PWL functions,in order to avoid the unstability of the muliplication of high order terms.As the threshold can be adjusted in the PWL-MP model,it is more flexible and accurate in the DPD technique.Experimental results show that the proposed model outperforms the GMP model while requiring less than 40％ coefficients.The adjacent channel power ratio (ACPR) and the normalized mean square error (NMSE) can be improved by 1dB and 8 dB respectively.So the PWL-MP model can achieve a relatively better performance in the DPD technique.关键词
功率放大器/数字预失真/广义记忆多项式/分段线性函数Key words
power amplifier/digital predistortion/generalized memory polynomial (GMP)/piecewise-linear functions分类
信息技术与安全科学引用本文复制引用
贾冰,赵宇,刘开华,马永涛,刘彦北..基于分段线性函数的功放模型及数字预失真应用[J].计算机工程与科学,2017,39(11):2043-2048,6.
