| 一种改进的数字预失真迭代算法 |
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| 引用本文： | 李环,张羽,祝乐芳. 一种改进的数字预失真迭代算法[J]. 沈阳理工大学学报, 2010, 29(3): 30-34 |
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| 作者姓名： | 李环 张羽 祝乐芳 |
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| 作者单位： | 1. 沈阳理工大学,信息科学与工程学院,辽宁,沈阳,110159;南京理工大学,自动化学院,江苏,南京,210094
2. 沈阳理工大学,信息科学与工程学院,辽宁,沈阳,110159 |
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| 摘 要： | 针对WCDMA等系统中功率放大器的有记忆非线性放大特性,分析数字预失真器的结构和常用预失真器的识别算法,提出一种适用于Hammerstein有记忆功放模型的自适应辨识算法,此算法较LR算法对信号的频谱再生有了更好的抑制。理论分析和计算机仿真验证了该算法的有效性和实用性.
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| 关 键 词： | 数字预失真 Hammerstein模型 LR算法 LR/LMS算法 功率放大器 |
Improved Iterative Algorithm for Digital Predistortion |
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| LI Huan,ZHANG Yu,ZHU Le-fang. Improved Iterative Algorithm for Digital Predistortion[J]. Transactions of Shenyang Ligong University, 2010, 29(3): 30-34 |
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| Authors: | LI Huan ZHANG Yu ZHU Le-fang |
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| Affiliation: | 1.Shenyang Ligong University,Shengyang 110159,China; 2.School of Automatic Control,Nanjing University of Science and Technology,Nanjng 210094,China) |
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| Abstract: | According to the nonlinear amplification with memory characteristics of amplifier in WCDMA systems,the structure of digital predistorter and the algorithm of predistorter system identification are analyzed.An adaptive identification algorithm for Hammerstein power amplifier model with memory is proposed which has a better suppression of signal spectral regrowth comparing with LR algorithm.Theoretical analysis and computer simulation prove the algorithm is effective and practical. |
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| Keywords: | digital predistortion Hammerstein model LR algorithm LR/LMS algorithm power amplifier |
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