| 基于HPA特性曲线拟合的自适应预失真技术 |
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| 引用本文： | 杨文考,刘小平,周尚波,朱维乐.基于HPA特性曲线拟合的自适应预失真技术[J].系统工程与电子技术,2004,26(2):167-169. |
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| 作者姓名： | 杨文考 刘小平 周尚波 朱维乐 |
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| 作者单位： | 1. 电子科技大学电子工程学院,四川,成都,610054
2. 湖南省南岳电视调频发射台,湖南,南岳,421001 |
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| 摘 要： | 提出了一种用于正交频分复用(OFDM)系统中补偿由大功率放大器引起的非线性失真的基带自适应预失真方法。自适应预失真器是基于对大功率放大器的非线性特性进行分段估计,由曲线拟合逐段取逆变换来训练大功率放大器的预失真器的非线性参数,以达到预是真补偿的目的。计算机仿真结果表明,该方法具有收敛速度快、需要动态存储器(RAM)少、补偿效果好等特点。
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| 关 键 词： | 正交频分复用系统 大功率放大器 非线性失真 自适应预失真 |
| 文章编号： | 1001-506X(2004)02-0167-03 |
| 修稿时间： | 2002年6月21日 |
Adaptive predistortion technology based on HPA characteristic curve fitting in OFDM system |
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| YANG Wen-kao,LIU Xiao-ping,ZHOU Shang-bo,ZHU Wei-le.Adaptive predistortion technology based on HPA characteristic curve fitting in OFDM system[J].System Engineering and Electronics,2004,26(2):167-169. |
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| Authors: | YANG Wen-kao LIU Xiao-ping ZHOU Shang-bo ZHU Wei-le |
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| Institution: | YANG Wen-kao~1,LIU Xiao-ping~2,ZHOU Shang-bo~1,ZHU Wei-le~1 |
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| Abstract: | A digital base band adaptive predistortion method to compensate nonlinear distortions introduced by a high-power amplifier (HPA) in orthogonal frequency division multiplexing (OFDM) system is proposed. The adaptive predistorter given can achieve the predistortion compensation based on piecewise estimating HPA nonlinear characteristic curve and training HPA estimator nonlinear parameters via performing inverse transform with curve fitting section by section. The computer simulation result shows that the method algorithm converges fast, RAM requires less and compensation effect is good. |
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| Keywords: | orthogonal frequency division multiplexing system high-power amplifier nonliear distortion adaptive predistortion |
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