支持200 MHz带宽的宽带共相放大器的设计和数字预失真线性化

2020 IEEE Topical Conference on RF/Microwave Power Amplifiers for Radio and Wireless Applications (PAWR) Pub Date : 2020-01-01 DOI:10.1109/PAWR46754.2020.9035997

P. Gilabert, D. Vegas, Zhixiong Ren, G. Montoro, Jose R. Perez-Cisneros, M. Ruiz, Xiaoshu Si, Jose A. Garcia

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引用次数: 7

摘要

本文提出了一种设计和线性化宽带同相功率放大器(PA)的整体方法，以有效放大符合电缆数据服务接口规范(DOCSIS)标准的200 MHz带宽(BW)信号。基于负载不敏感的GaN HEMT e类拓扑结构，提出了一种基于负载不敏感GaN HEMT e类拓扑结构的分相放大器，该方案旨在解决高效率覆盖的输出功率控制范围与期望BW之间的权衡问题。采用等增益方法，采用数字预失真线性化技术，保证了系统的线性性能，并结合波峰因数降低(CFR)技术提高了系统的整体功率效率。当拟合26.3 dBm 64 QAM DOCSIS信号的标准带内和带外线性要求时，平均效率为18.7%，PAPR为12.2 dB。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Design and Digital Predistortion Linearization of a Wideband Outphasing Amplifier Supporting 200 MHz Bandwidth

This paper presents a holistic approach to design and linearize a wideband outphasing power amplifier (PA) to efficiently amplify a 200 MHz bandwidth (BW) signal compliant with the Data Over Cable Service Interface Specification (DOCSIS) standard. The proposed outphasing PA, based on a load insensitive GaN HEMT class-E topology, was designed to face the trade-off between the output power control range to be covered with high efficiency and the desired BW. Operated following an isogain approach, the linearity performance is ensured by applying digital predistortion linearization, which combined with crest factor reduction (CFR) techniques can enhance the overall power efficiency. An 18.7% average efficiency has been measured when fitting the standard in-band and out-of-band linearity requirements for a 26.3 dBm 64 QAM DOCSIS signal with 12.2 dB of PAPR.

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来源期刊

2020 IEEE Topical Conference on RF/Microwave Power Amplifiers for Radio and Wireless Applications (PAWR)

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