RF Subsampling Feedback Loop Technique for Concurrent Dual-Band PA Linearization

被引：12

作者：

Prata, Andre ^{[1
]}

Ribeiro, Diogo C. ^{[1
]}

Cruz, Pedro Miguel ^{[1
]}

Oliveira, Arnaldo S. R. ^{[1
]}

Carvalho, Nuno Borges ^{[1
]}

机构：

[1] Univ Aveiro, Dept Elect Telecomunicacoes & Informat, Inst Telecomunicacoes, P-3810193 Aveiro, Portugal

来源：

IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES | 2016年 / 64卷 / 12期

关键词：

Concurrent dual-band; digital predistortion (DPD); mixed signal; subsampling analog-to-digital converters (ADCs); DIGITAL PREDISTORTION; ARCHITECTURE;

D O I：

10.1109/TMTT.2016.2608893

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

This paper investigates feedback loops using radio-frequency (RF) subsampling analog-to-digital converters as a way to improve the concurrent dual-band transmitters linearization. The feedback loop will be characterized and postcompensated in the digital domain, followed by a new technique for a concurrent dual-band digital predistortion (DPD) scenario where aliasing between both the carriers is allowed to occur. The proposed technique is based on statistical approximated nonoverlapped multisines that permit relaxing the feedback loop requirements. The measurement results in a 2-D-DPD scenario are presented and compared with other state-of-the-art techniques. Metrics such as adjacent channel power ratio and error vector magnitude are evaluated in order to corroborate the correct functioning of the proposed technique.

引用

页码：4174 / 4182

页数：9

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