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arXiv 2005.09848eess.SP
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卷积神经网络用于宽带功率放大器的行为建模和预失真

Convolutional Neural Network for Behavioral Modeling and Predistortion of Wideband Power Amplifiers

Xin Hu, Zhijun Liu, Xiaofei Yu, Yulong Zhao, Wenhua Chen, Biao Hu, Xuekun Du, Xiang Li, Mohamed Helaoui, Weidong Wang, Fadhel M. Ghannouchi

摘要:

在本文中,我们提出了一种新的行为模型的宽带PA使用实值时间延迟卷积神经网络(RVTDCNN)。该模型的输入数据被排序和安排的图形组成的同相和正交(I/Q)分量和电流和过去的信号的相位依赖项。我们设计了一个预先设计的滤波器,使用卷积层提取PA正向或反向建模所需的基函数。使用简单的全连接层对生成的丰富基函数进行建模。由于卷积结构的权值共享特性,强记忆效应不会导致模型复杂度的明显增加。同时,预先设计的滤波器的提取效果也降低了模型的训练复杂度。实验结果表明,RVTDCNN模型的性能与NN模型和多层NN模型几乎相同。

英文摘要:

In this paper, we propose a novel behavior model for wideband PAs using a real-valued time-delay convolutional neural network (RVTDCNN). The input data of the model are sorted and arranged as the graph composed of the in-phase and quadrature (I/Q) components and envelope-dependent terms of current and past signals. We design a pre-designed filter using the convolutional layer to extract the basis functions required for the PA forward or reverse modeling. The generated rich basis functions are modeled using a simple fully connected layer. Because of the weight sharing characteristics of the convolutional structure, the strong memory effect does not lead to a obvious increase in the complexity of the model. Meanwhile, the extraction effect of the pre-designed filter also reduces the training complexity of the model. The experimental results show that the performance of the RVTDCNN model is almost the same as the NN models and the multilayer NN models.

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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