| OFDM系统中非线性放大器的改进预失真技术 |
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| 引用本文： | 秦川,常天海.OFDM系统中非线性放大器的改进预失真技术[J].电光与控制,2011,18(1):61-65. |
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| 作者姓名： | 秦川 常天海 |
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| 作者单位： | 华南理工大学电子与信息学院; |
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| 基金项目： | 国家科技重大专项(2009ZX03006-001); 广东省科技重大专项(2009A080207002) |
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| 摘 要： | 针对OFDM系统中非线性放大器对信号造成的非线性失真影响,采用基于查询表的自适应预失真技术对其进行矫正.在基于最小均方误差算法的经典自适应预失真算法的基础上,采用线性内插算法来更新查询表的内容,从而提高自适应预失真算法的矫正效果;结合OFDM符号的概率分布特性,提出一种增加较大幅度OFDM信号迭代次数的方法,来提高预失...
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| 关 键 词： | 正交频分复用 非线性放大器 自适应预失真 |
An Improved Adaptive Pre-Distortion Technology for Non-Linear Amplifier in OFDM Systems |
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| QIN Chuan,CHANG Tianhai.An Improved Adaptive Pre-Distortion Technology for Non-Linear Amplifier in OFDM Systems[J].Electronics Optics & Control,2011,18(1):61-65. |
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| Authors: | QIN Chuan CHANG Tianhai |
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| Affiliation: | QIN Chuan,CHANG Tianhai(School of Electronic and Information Engineering,South China University of Technology,Guangzhou 510640,China) |
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| Abstract: | Focusing on the nonlinear distortion caused by nonlinear amplifier in OFDM system,an adaptive pre-distortion technique based on Look Up Table(LUT) was used to rectify it.On the basis of the classic adaptive pre-distortion algorithm based on the least mean square algorithm,linear interpolation algorithm was adopted to update the content of LUT,with the aim of improving the algorithm's rectification effect.With consideration of OFDM symbols' probability distribution characteristic,one method increasing iterat... |
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| Keywords: | Orthogonal Frequency Division Multiplexing(OFDM) nonlinear amplifier adaptive pre-distortion |
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