Extending the Characterization Bandwidth of Dynamic Nonlinear Transmitters With Application to Digital Predistortion

被引：9

作者：

Bensmida, Souheil ^{[1
]}

Hammi, Oualid ^{[2
]}

Kwan, Andrew ^{[3
]}

Sharawi, Mohammad S. ^{[4
]}

Morris, Kevin A. ^{[1
]}

Ghannouchi, Fadhel M. ^{[3
]}

机构：

[1] Univ Bristol, Commun Syst & Networks Grp, Bristol BS8 1UB, Avon, England

[2] Amer Univ Sharjah, Dept Elect Engn, Sharjah, U Arab Emirates

[3] Univ Calgary, Schulich Sch Engn, Dept Elect & Comp Engn, iRadio Lab, Calgary, AB T2N 1N4, Canada

[4] King Fahd Univ Petr & Minerals, Dept Elect Engn, Dhahran 31261, Saudi Arabia

来源：

IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES | 2016年 / 64卷 / 08期

基金：

英国工程与自然科学研究理事会; 加拿大自然科学与工程研究理事会;

关键词：

Digital predistortion (DPD); dynamic distortions; LTE-Advanced; memory effects; power amplifier (PA); vector signal analysis; wideband; DOHERTY POWER-AMPLIFIER; SIGNAL;

D O I：

10.1109/TMTT.2016.2585494

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 reports a new measurement method for wideband radiofrequency power amplifier (PA) characterization and digital predistortion. The proposed measurement procedure significantly relaxes the sampling rate requirement on the analog-to-digital converters of the feedback path. Successful PA linearizations were achieved in the presence of 20, 40, and 60-MHz LTE-A signals using a vector signal analyzer with sampling speeds equal to only 24, 40.96, and 61.44 Ms/s, respectively. Despite these very low sampling rates, a quasiperfect cancellation of the PA distortions was achieved (more than 50 dBc in terms of ACLR), in all tests, over bandwidths including up to fifth-order intermodulation distortions. Such a correction bandwidth is much wider than the observation bandwidths associated with the receiver sampling rates.

引用

页码：2640 / 2651

页数：12

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