基于反馈迭代的双带功率放大器数字预失真  

Digital predistortion based on feedback iteration for concurrent dual-band power amplifier

作　　者：李永松[1] 陈客松[1] 胡哲彬[1] 王显飞[1] 朱盼[2] 

机构地区：[1]电子科技大学电子工程学院,四川成都611731 [2]中国民用航空局第二研究所,四川成都610041

出　　处：《电子技术应用》2013年第8期40-43,共4页Application of Electronic Technique

基　　金：国家科技支撑计划课题(2011BAH24B05)

摘　　要：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100 MHz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。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.

关 键 词：交叉调制 双带 数字预失真 反馈迭代 

分 类 号：TN837[电子电信—信息与通信工程]