现代电子技术2018，Vol.41Issue(5)：5-9,5.DOI:10.16652/j.issn.1004-373x.2018.05.002
一种峰值功率控制的带限数字预失真算法
Band-limited digital predistortion algorithm based on peak power control
摘要
Abstract
As the analog to digital converter(ADC)needed in feedback circuit based on digital predistortion(DPD)tech-nology in broadband wireless communication system has high sampling rate and increasing PAPR after predistortion,a band-limited digital predistortion algorithm based on peak power control is proposed. The threshold is set to control the signal ampli-tude after predistortion to reduce the PAPP. The band-pass filter is used to limit the sampling bandwidth of ADC,and the spec-tral extrapolation method is used to accomplish the integrated estimation for the band-limited output signal,so as to reduce the ADC sampling rate. The experimental results demonstrate that the algorithm can reduce the system sampling rate and improve the linearization of the power amplifier. In comparison with the traditional predistortion technology,the adjacent channel power ratio of the power amplifier's output signal is reduced by about 5 dB.关键词
射频功率放大器/峰值功率控制/频谱外推/带宽限制/数字预失真/最小二乘法Key words
radio frequency power amplifier/peak power control/spectral extrapolation/bandwidth limitation/digital pre-distortion/least square method分类
信息技术与安全科学引用本文复制引用
陈中森,巩稼民,张博..一种峰值功率控制的带限数字预失真算法[J].现代电子技术,2018,41(5):5-9,5.基金项目
国家自然科学基金资助项目(61775180) （61775180）
陕西省重点研发项目(2017ZDXM-GY-004)Project Supported by National Natural Science Foundation of China(61775180),Key Research and Development Projects of Shaanxi Province (2017ZDXM-GY-004) （2017ZDXM-GY-004）
