具有记忆效应的Doherty功率放大器组合记忆多项式模型

2012 International Conference on Microwave and Millimeter Wave Technology (ICMMT) Pub Date : 2012-05-05 DOI:10.1109/ICMMT.2012.6230053

Jianfeng Zhai, Lei Zhang, J. Xia, Jianyi Zhou, Xiaowei Zhu, W. Hong

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引用次数: 4

摘要

提出了具有记忆效应的Doherty功率放大器的组合记忆多项式模型。该模型将记忆多项式模型与包络记忆项相结合。采用Levenberg-Marquardt方法估计模型参数。采用矢量信号分析仪(VSA)对Doherty功率放大器的输入输出信号进行采样，并在20MHz LTE信号的试验台上成功验证了该模型的有效性。通过对频域测量结果和建模结果的比较，可以获得良好的建模精度，归一化均方误差(NMSE)约为-40 dB。

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Combined memory polynomial model for Doherty power amplifiers with memory effects

This paper presents a combined memory polynomial model for Doherty power amplifiers with memory effects. The model combines the memory polynomial model with an envelope memory term. Levenberg-Marquardt Method is applied to estimate the model parameters. The model has been successfully validated with 20MHz LTE signals in the test bench, in which the input and output signals of a Doherty power amplifier are sampled by a vector signal analyzer (VSA). Good modeling accuracy can be achieved with normalized mean square errors (NMSE) of about -40 dB by comparison between measurements and modeling results in frequency domain.

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2012 International Conference on Microwave and Millimeter Wave Technology (ICMMT)

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