基于反馈迭代的双带功率放大器数字预失真术

为补偿双带功率放大器中的非线性，提出了二维多项式模型并结合反馈迭代法建立数字预失真系统。相比于传统的线性化技术，二维数字预失真方法降低了对数／模转换器和模／数转换器的要求。仿真结果表明，采用间隔频率为100MHz的两路WCDMA信号同时驱动功率放大器，二维多项式模型能够更好地消除非线性失真，反馈迭代方法在求逆上更精确。...

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Bibliographic Details
Published in电子技术应用 Vol. 39; no. 8; pp. 40 - 43
Main Author 李永松 陈客松 胡哲彬 王显飞 朱盼
Format Journal Article
LanguageChinese
Published 2013
Subjects
交叉调制
双带
反馈迭代
数字预失真
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Summary:为补偿双带功率放大器中的非线性，提出了二维多项式模型并结合反馈迭代法建立数字预失真系统。相比于传统的线性化技术，二维数字预失真方法降低了对数／模转换器和模／数转换器的要求。仿真结果表明，采用间隔频率为100MHz的两路WCDMA信号同时驱动功率放大器，二维多项式模型能够更好地消除非线性失真，反馈迭代方法在求逆上更精确。
Bibliography:Li Yongsong^1,Chen Kesong^1, Hu Zhebin^1, Wang Xianfei^1 ,Zhu Pan^2 （1.School of Electronic Engineering, UESTC, Chengdu 611731 , China ; 2.The Second Research Institute of CAAC, Chengdu 610041, China）
cross-modulation ; dual-band ; digital predistortion（DPD） ; feedback iteration
This paper presents a 2D digital predistortion（2D-DPD） technique combined with the feedback iteration method that is applied to linearization of concurrent dual-band power amplifier. Compared with conventional linearization techniques, this 2D DPD method reduces the requirement for the digital-to-analog and analog-to-digital converter device. This simulation results show that using two modulated wideband code-division multiple-access signals （WCDMA）at the same time, separated the frequency by 100 MHz, two-dimensional polynomial model can better eliminate the nonlinear distortion and feedback iteration method used on the inverse is more accurate.
11-2305/TN
ISSN:0258-7998