| WCDMA系统中基于查找表的预失真技术的研究 |
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| 引用本文： | 杨小力,石江宏,吴晓芳.WCDMA系统中基于查找表的预失真技术的研究[J].国外电子元器件,2010(3):96-98. |
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| 作者姓名： | 杨小力 石江宏 吴晓芳 |
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| 作者单位： | 厦门大学信息科学与技术学院; |
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| 基金项目： | 福建省重大专项基金资助项目(2007HZ0003) |
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| 摘 要： | 在无线通信系统中，高功率放大器因其非线性，导致AM／PM效应使得微分相位、微分增益和互调失真变坏。高质量的通信系统设计应尽可能减小功率放大器的AM／PM效应。因此，针对宽带码分多址（WCDMA）功放非线性失真问题，采用一种基于查找表（LUT）的自适应预失真方法，改善功放的非线性失真。仿真表明．该方法能有效补偿放大器产生的AM—AM、AM-PM失真，并将功放的邻道功率泄漏比（ACPR）改善到30dB左右。
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| 关 键 词： | 线性化 查找表 预失真 自适应 |
Research of predistortion technique based on LUT in WCDMA systems |
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| YANG Xiao-li,SHI Jiang-hong,WU Xiao-fang.Research of predistortion technique based on LUT in WCDMA systems[J].International Electronic Elements,2010(3):96-98. |
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| Authors: | YANG Xiao-li SHI Jiang-hong WU Xiao-fang |
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| Affiliation: | School of Information Science and Technology;Xiamen University;Xiamen 361005;China |
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| Abstract: | In wireless communication systems,the nonlinearity of high power amplifier(HPA) always cause AM/PM effect.The existence of AM/PM effect makes differential gain,differential phase and intermodulation distortion become worse.Therefore,linearization technique is needed to suppress the AM/PM effects.In this paper,a LUT based predistortion method is used to deal with the distortion of WCDMA power amplifier.Simulation shows that this method can effectively adjustment of the AM-AM and AM-PM curves,and the ACPR can... |
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| Keywords: | linearization LUT predistortion self-adaptation |
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