适用于并发多频段功放的数字预失真技术研究

摘要：现今多种频段、多种通信制式的通信网络并存，且在可见的未来这种状况不可能改变，这就与通信系统小型化集约化的愿望相悖，能够同时支持多标准多频段的通信系统成为研究热点。所以支持并发多频段的功率放大器相继出现，研究并发多频段的预失真技术具有重要的意义。

本文着眼于并发双频段数字预失真技术，介绍了本课题的研究背景和研究现状，根据双频段功放与单一频段功放的非线性特性的不同之处，构建适用于并发双频段的 2D-DPD 预失真模型，并以此为基础提出了两种 2D-DPD 模型的简化形式（O2D-DPD 与 MO2D- DPD）。分析了预失真迭代效果，并使用双频段功率平衡方法，最后，对 MATLAB 仿真和硬件实测结果进行了比较和分析。相比传统预失真模型，双频段模型所需 ADC 采样率要求更低，预失真效果更好。根据仿真和硬件实测结果显示：在相同阶数和记忆深度的情况下，2D-DPD 及其简化模型相比传统 MP 模型线性化补偿效果更好。两个频段距离越远，两种简化 2D-DPD 模型与 2D-DPD 模型的预失真效果越接近，而 MO2D-DPD 模型的参数数量最少，模型复杂度低于 2D-DPD 和 O2D-DPD 模型。所以，当两频段相距较远时，MO2D-DPD 模型相比其他两种双频段模型更加优越。

关键词多频段预失真 2D-DPD 模型简化模型

毕业设计说明书外文摘要

Title Digital Predistortion Technology for Concurrent Multi-band Power Amplifier

Abstract：Now a variaty of frequency bands and standards communication networks coexists, and in the foreseeable future this situation cannot be changed, which is contrary to the desire to miniaturize the communication system. Therefore, the simultaneously multi-standard multi-band communication system has become a research hotspot. The power amplifiers which can support concurrent multi-band have emerged. The study of concurrent multi-band predistortion technology is of great significance.

This paper focues on concurrent dual-band digital predistortion technology. Based on the difference of the non-linear characteristics between dual-band amplifiers and single band amplifiers, 2D-DPD model is constructed for the concurrent dual band. Propose two smplified form O2D-DPD and MO2D-DPD. Analyze the predistortion iterative effect and use the dual-band power balance method. Compared to the traditional predistortion model, dual-band models require a lower ADC sampling rate but have the better predistortion effect. According to simulation and hardware test, it is shown that 2D-DPD and its simplified models have better liearzation effect than traditional model in the same order and memory depth. The farther the two frequency bands are, the closer the predistortion effect between simplified models and 2D-DPD model. The complexity of MO2D-DPD model is lower than 2D-DPD and O2D-DPD model. Therefore, when two frequency bands away form each other, MO2D-DPD model is more superior than the other two dual band predistortion model.

Keywords multi-band predistortin 2D-DPD model simplified model

1 绪论 1

1.1 研究背景与现状 1

1.2 论文的工作和组织结构 1

2 功率放大器的非线性和记忆性特性 3

2.1 非线性特性 3

2.2 功放的记忆性 3

2.3 双频段功放的非线性 4

2.4 描述功放非线性的主要指标 4

3 适用于双频段功放的预失真模型及训练结构 7 适用于并发多频段功放的数字预失真技术研究:http://www.chuibin.com/tongxin/lunwen_205621.html