预失真线性器结构对滤波纹波的光谱灵敏度

IEEE 54th Vehicular Technology Conference. VTC Fall 2001. Proceedings (Cat. No.01CH37211) Pub Date : 2001-10-07 DOI:10.1109/VTC.2001.956462

W. Shan, Lars Sundström, B. Shi

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引用次数: 7

摘要

用于蜂窝基站的多载波功率放大器对线性度的要求非常高。预失真是射频放大器线性化的一种有效方法。但预失真系统的线性性能受到各种记忆效应的限制。我们研究了预失真器和PA之间的滤波器的影响。通过对多载波信号的分析和仿真，研究了这些影响。提出了一种基于滤波器传递函数和放大器非线性特性估计输出频谱的方法。

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Spectral sensitivity of predistortion linearizer architectures to filter ripple

Multi-carrier power amplifiers (PA) used in cellular base stations have very high linearity requirement. Predistortion is a powerful method for linearization of RF PA. But linearity performance of a predistortion system is limited by various memory effects. We investigate the effects of filters between the predistorter and the PA. These effects are studied by means of analysis and simulation for multi-carrier signals. A method is developed that can be used to estimate the output spectrum based on the filter transfer function and the nonlinearity of the PA.

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IEEE 54th Vehicular Technology Conference. VTC Fall 2001. Proceedings (Cat. No.01CH37211)

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