An Average Power Tracking Method for Wideband Highly Nonlinear Power Amplifiers

被引：1
|
作者：
Zhu, Shitao [1 ]
Zhang, Anxue [1 ]
Xu, Zhuo [1 ]
Dong, Xiaoli [2 ]
机构：
[1] Xi An Jiao Tong Univ, Sch Elect & Informat Engn, Xian 710049, Peoples R China
[2] Xian Univ Posts & Telecommun, Sch Telecommun & Informat Engn, Xian 710061, Peoples R China
来源：
IEEE MICROWAVE AND WIRELESS COMPONENTS LETTERS | 2015年 / 25卷 / 04期
基金：
中国国家自然科学基金;
关键词：
Average power tracking; digital predistortion (DPD); wideband highly nonlinear power amplifier; DIGITAL PREDISTORTION; MEMORY;
D O I：
10.1109/LMWC.2015.2400938
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
An accurate average power tracking method is presented to track and compensate the fluctuation of power amplifier (PA) output during updates of digital predistorter. Firstly, joint distortion probability distribution (JDPD) of the predistorter input signal and PA compression state is presented to extract the average power gain fluctuation related to the nonlinearity of the PA. The accurate PA compression state is extracted by linear-zone-reposition technique. Then, the average power gain fluctuation related to PA memory is obtained assisted by the predistortion model. The PA output power fluctuation is well controlled through the proposed method. Results from experiments show that the performance of DPD improves at least 3 dB for long time experiments when the proposed method is used for wideband highly nonlinear PA.
引用
收藏
页码：274 / 276
页数：3
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