| OFDM系统自适应数字预失真研究 |
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| 引用本文： | 张志刚,林其伟,韩霜,饶琴.OFDM系统自适应数字预失真研究[J].通信技术,2011,44(4):50-52. |
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| 作者姓名： | 张志刚 林其伟 韩霜 饶琴 |
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| 作者单位： | 国立华侨大学信息科学与工程学院,福建厦门,361021 |
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| 基金项目： | 福建省自然科学基金资助项目 |
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| 摘 要： | 研究了正交频分复用（OFDM）传输系统中高功率放大器（HPA）的自适应预失真方法。针对OFDM信号的高峰平比特性及HPA带来的非线性失真,提出一种基于训练序列的最小均方误差（LMS）算法和递归最小二乘（RLS）算法的组合算法,将其应用到基于记忆多项式模型的数字预失真系统中。用MATLAB构建一个基于该自适应算法的预失真系统。仿真结果表明：该算法能有效的改善放大器的非线性特性。
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| 关 键 词： | 正交频分复用 功率放大器 自适应 数字预失真 |
Adaptive Digital Pre-distortion of OFDM System |
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| ZHANG Zhi-gang,LIN Qi-wei,HAN Shuang,RAO Qin.Adaptive Digital Pre-distortion of OFDM System[J].Communications Technology,2011,44(4):50-52. |
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| Authors: | ZHANG Zhi-gang LIN Qi-wei HAN Shuang RAO Qin |
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| Affiliation: | ZHANG Zhi-gang,LIN Qi-wei,HAN Shuang,RAO Qin(College of Information Science and Engineering,National Huaqiao University,Xiamen Fujian 361021,China) |
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| Abstract: | The adaptive pre-distortion method for high-power amplifier of the orthogonal frequency division multiplexing(OFDM) transmission system is studied.Aiming at the nonlinear distortion brought about by peak-to-average-power-ratio characteristic and the high-power amplifier,a combined algorithm based on minimum mean square error(LMS) algorithm of the training sequence and recursive least squares(RLS) algorithm is proposed,and applied to the pre-distortion system based on memory polynomial model.A pre-distortion... |
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| Keywords: | OFDM power amplifier adaptive digital pre-distortion |
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