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首页> 外文期刊>IEEE Transactions on Industrial Electronics >A Robust Augmented Complexity-Reduced Generalized Memory Polynomial for Wideband RF Power Amplifiers
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A Robust Augmented Complexity-Reduced Generalized Memory Polynomial for Wideband RF Power Amplifiers

机译：宽带射频功率放大器的鲁棒增强的，降低复杂度的广义记忆多项式

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摘要

This paper proposes a robust model for the accurate behavioral modeling and digital predistortion (DPD) of wideband radio-frequency power amplifiers (PAs). It is constructed using a complexity-reduced generalized memory polynomial (MP) (GMP) (CR-GMP) connected with a nonlinear memory effect (NME) subblock in parallel. The CR-GMP is a complexity-reduced but accuracy-degraded version of the conventional GMP, and its performance is augmented by the extra NME subblock. Hence, the proposed model is termed as augmented CR-GMP (ACR-GMP). The resultant ACR-GMP model can achieve comparable performance as the GMP model, but with much fewer coefficients and lower complexity. Its performance is experimentally assessed both in forward modeling and DPD linearization. Comparisons are conducted between the ACR-GMP model and some state-of-the-art models, such as the MP, the PLUME, and the GMP. Experimental results have been given for a 1.9-GHz 35-W peak-power GaN Class-AB PA driven by two signal scenarios: a 15-MHz bandwidth long-term-evolution signal and a 20-MHz bandwidth wideband-code-division-multiple-access 1001 signal (with the middle two carriers OFF). All the results show that the ACR-GMP model outperforms both the MP and the PLUME models in terms of performances and the GMP model in terms of complexity (at comparable performances).
机译：本文针对宽带射频功率放大器（PA）的准确行为建模和数字预失真（DPD），提出了一个健壮的模型。它是通过降低复杂性的广义存储多项式（MP）（GMP）（CR-GMP）与非线性存储效应（NME）子块并行连接来构造的。 CR-GMP是传统GMP降低了复杂性但降低了精度的版本，其性能通过额外的NME子块得到了增强。因此，所提出的模型称为增强CR-GMP（ACR-GMP）。所得的ACR-GMP模型可以实现与GMP模型相当的性能，但是系数要少得多，复杂度也要低。在前向建模和DPD线性化中均通过实验评估了其性能。在ACR-GMP模型和一些最新模型（例如MP，PLUME和GMP）之间进行了比较。已经给出了由两种信号场景驱动的1.9GHz 35W峰值功率GaN AB类GaN PA的实验结果：一个15MHz带宽的长期演进信号和一个20MHz带宽的宽带码分-多路访问1001信号（中间两个载波关闭）。所有结果表明，在性能方面，ACR-GMP模型优于MP和PLUME模型，在复杂性方面（在可比性能方面）优于GMP模型。

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