Accurate Linearization with Low-Complexity Models Using Cascaded Digital Predistortion Systems

被引：9
|
作者：
Barradas, Filipe M. [1 ]
Nunes, Luis C. [1 ]
Pedro, Jose C. [1 ]
Cunha, Telmo R. [1 ]
Lavrador, Pedro M. [1 ]
Cabral, Pedro M. [1 ]
机构：
[1] Univ Aveiro, Inst Telecomunicacoes, DETI, P-3800 Aveiro, Portugal
来源：
IEEE MICROWAVE MAGAZINE | 2015年 / 16卷 / 01期
关键词：
Power amplifiers - Radio frequency amplifiers - Efficiency;
D O I：
10.1109/MMM.2014.2367864
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：
Power efficiency is one of the main concerns in modern radio frequency (RF) power amplifier (PA) design. However, efficiency-driven designs typically impose operation of these devices in a compressed mode [1]. When operating in this region, the amplifiers will behave nonlinearly and produce a distorted output signal [1]. This distortion produces new spectral components at the PAs' output that are outside the bandwidth of the input signal, so the distorted output signal has a wider bandwidth than the input signal. This bandwidth enlargement effect, called "spectral regrowth," is undesired in RF transmitters due to wireless systems' spectral mask regulations [2]. © 2000-2012 IEEE.
引用
收藏
页码：94 / 103
页数：10
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