光通信研究Issue(1)：52-55,4.DOI:10.13756/j.gtxyj.2015.01.017
一种模拟预失真自适应线性化方法
A method for adaptive linearization using analog pre-distortion
摘要
Abstract
In view of the nonlinearity problems of RF power amplifiers,a two complex polynomials-based analog pre-distortion circuit is proposed in this paper,and the coefficients of these polynomials are adaptively optimized according to the response of the power amplifier using the LMS algorithms,resulting in the optimum linearity of the power amplifier.This pre-distorter is characterized in simple circuit,little computation and suitability for broadband communications.Furthermore,it is experimen-tally simulated and tested on the basis of dual-band and WCDMA signals.The results indicate that the pre-distortion lineariza-tion method is obviously effective to inhibiting Intermodulation (IM)distortion components and improves the Adjacent Channel Power Ratio (ACPR)to 56.1 dB,well compensating the nonlinearity of the RF power amplifiers.关键词
功率放大器/模拟预失真/线性化技术/自适应控制/多项式Key words
power amplifier/analog pre-distortion/linearization technology/adaptive control/polynomial分类
信息技术与安全科学引用本文复制引用
刘迪迪,宋树祥,王俊义..一种模拟预失真自适应线性化方法[J].光通信研究,2015,(1):52-55,4.基金项目
国家自然科学基金资助项目(61361011,61261017) （61361011,61261017）
广西自然科学基金资助项目(2013GXNSFAA019334) （2013GXNSFAA019334）
广西无线宽带通信与信号处理重点实验室资助项目(11107) （11107）
