| 宽带OFDM功放自适应数字预失真算法的研究与实现 |
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| 引用本文： | 王建新,余建国. 宽带OFDM功放自适应数字预失真算法的研究与实现[J]. 电信科学, 2009, 25(12) |
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| 作者姓名： | 王建新 余建国 |
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| 作者单位： | 北京北方烽火科技有限公司,北京,100085;武汉邮电科学研究院光纤通信技术和网络国家重点实验室(筹),武汉,430074 |
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| 基金项目： | 国家"863"高科技计划基金资助项目 |
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| 摘 要： | 针对宽带OFDM功放的线性化问题,本文提出了一种基于训练序列的递推最小二乘算法和最小均方算法的组合算法.并将其应用到基于多项式的数字预失真系统中以实现自适应数字预失真滤波器系数的估计和更新.本文首先介绍了整个数字预失真系统的组成架构;然后是自适应数字预失真算法的实现,使用MATLAB软件对其算法进行仿真验证;最后还组建了实验系统,进行了ACLR测试实验.仿真结果和测试结果均表明基于自适应数字顶失真算法的宽带线性化功放具有良好的性能,OFDM功放输出的线性度改善6dB.
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| 关 键 词： | 正交频分复用 功放 数字预失真 自适应算法 递推最小二乘算法 |
Research and Realization of Adaptive Digital Pre-distortion Algorithm for Wideband OFDM Power Amplifiers |
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| Wang Jianxin,Yu Jianguo. Research and Realization of Adaptive Digital Pre-distortion Algorithm for Wideband OFDM Power Amplifiers[J]. Telecommunications Science, 2009, 25(12) |
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| Authors: | Wang Jianxin Yu Jianguo |
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| Affiliation: | Wang Jianxin1,2,Yu Jianguo1,2(1.Beijing Northern FiberHome Technologies Co.,Ltd.,Beijing 100085,China,2.State Key Laboratory of Optical Communication Technologies and Networks,Wuhan Research Institute of Post and Telecommunications,Wuhan 430074,China) |
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| Abstract: | Focused on the problem that the wideband OFDM power amplifiers has linearization,a hybrid algorithm of LMS and RLS based on training sequence is proposed,which is applied to a digital pre-distortion system based on polynomial.It can estimation and update adaptive digital pre-distortion filter coefficients.First,this paper was given the configuration of all digital pre-distortion system.Second,adaptive digital pre-distortion algorithm was realized.The algorithm was simulated by using MATLAB software.At last,... |
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| Keywords: | orthogonal frequency division multiplexing(OFDM) power amplifier(PA) digital pre-distortion(DPD) adaptive algorithm recursive least square algorithm |
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