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arXiv 2003.13361eess.SP
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高效注意力引导5G功放数字预失真

Efficient attention guided 5G power amplifier digital predistortion

Alexandru Cioba, Alvin Chua, Da-shan Shiu, Ting-Hsun Kuo, Chia-Sheng Peng

摘要:

我们研究了神经网络(NN)辅助技术,用于通过数字预失真(DPD)补偿5G PA的非线性行为和记忆效应。传统上,最流行的补偿技术使用记忆多项式模型(MPM)来计算补偿元素。各种神经网络建议已被证明可以改善这种性能。然而,到目前为止,它们大多伴随着现实世界实现的高昂的训练或推理成本。在本文中,我们提出了一个DPD架构,建立在实际的MPM制定由神经注意。我们的方法使一组MPM DPD组件能够单独学习以数据空间的不同区域为目标,结合它们的输出以获得更好的整体补偿。我们的方法产生类似的性能,以最小的复杂性,更高的容量NN模型。最后,我们认为我们的方法作为一个框架,可以扩展到各种各样的本地补偿器类型。

英文摘要:

We investigate neural network (NN) assisted techniques for compensating the non-linear behaviour and the memory effect of a 5G PA through digital predistortion (DPD). Traditionally, the most prevalent compensation technique computes the compensation element using a Memory Polynomial Model (MPM). Various neural network proposals have been shown to improve on this performance. However, thus far they mostly come with prohibitive training or inference costs for real world implementations. In this paper, we propose a DPD architecture that builds upon the practical MPM formulation governed by neural attention. Our approach enables a set of MPM DPD components to individually learn to target different regions of the data space, combining their outputs for a superior overall compensation. Our method produces similar performance to that of higher capacity NN models with minimal complexity. Finally, we view our approach as a framework that can be extended to a wide variety of local compensator types.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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