非线性曲线拟合在射频功率放大器线性化数字预失真中的应用

2005 5th International Conference on Information Communications & Signal Processing Pub Date : 2005-12-06 DOI:10.1109/ICICS.2005.1689192

Shanying Wu, S. Hau, Y. Wong

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引用次数: 5

摘要

非线性一直是大功率功率放大器的一个普遍问题。数字预失真(DPD)是解决这一问题的最有效方法之一。本文采用非线性曲线拟合的方法实现数字预失真。我们将我们的技术应用到一个射频功率放大器上，该放大器的名义工作频率为885 MHz，输出功率为30瓦。将IS95标准测试信号应用于功率放大器，将其输出功率推至45瓦时，我们发现该技术可以大大改善功率放大器的非线性(ACLR为8 dB)。实验结果证明了该方法的成功和可行性

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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The use of Nonlinear Curvefitting in Digital Predistortion for Linearizing RF Power Amplifiers

Nonlinearity has long been recognized as a problem endemic in power amplifiers (PA) with a high power. Digital predistortion (DPD) is one of most effective method to solve this problem. In this paper we used nonlinear curve-fitting to perform digital predistortion. We applied our technique to a RF power amplifier that nominally operates at 885 MHz with 30 watts output. When the IS95 standard test signal is applied to the power amplifier with its output power pushed to 45 watts, we found that nonlinearity of power amplifiers can be greatly improved (8 dB in ACLR) by our technique. Experimental results demonstrate the success and the feasibility of this method

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2005 5th International Conference on Information Communications & Signal Processing

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