Selective Intermodulation Compensation in a Multi-Stage Digital Predistorter for Nonlinear Multi-Band Power Amplifiers

被引：6

作者：

Kwan, Andrew K. ^{[1
]}

Younes, Mayada F. ^{[1
,2
]}

Hammi, Oualid ^{[3
]}

Helaoui, Mohamed ^{[1
]}

Boulejfen, Noureddine ^{[4
]}

Ghannouchi, Fadhel M. ^{[1
]}

机构：

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

[2] Alexandria Univ, Dept Elect & Commun Engn, Alexandria 21544, Egypt

[3] Amer Univ Sharjah, Dept Elect Engn, Sharjah 26666, U Arab Emirates

[4] Fac Sci Tunis, Phys Dept, Elect Lab, Tunis 2092, Tunisia

来源：

IEEE JOURNAL ON EMERGING AND SELECTED TOPICS IN CIRCUITS AND SYSTEMS | 2017年 / 7卷 / 04期

基金：

加拿大自然科学与工程研究理事会;

关键词：

5G; intermodulation; multi-band; predistortion; wide-band; BANDWIDTH; ARCHITECTURE;

D O I：

10.1109/JETCAS.2017.2777409

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 presents a technique for suppressing the intermodulation distortion caused by nonlinear multi-band power amplifiers with minimal modeling complexity. The technique is based on generating a narrowband static predistorter for the power amplifier. Then, the intended multi-band signals are resampled and shifted into their representative carrier frequencies before applying the static predistorter in order to accommodate the intermodulation distortion products produced by the nonlinearity. Since the resampling frequency may be high, a study is presented, using filtering techniques to represent lowbandwidth transmitter schemes, to show the accuracy of the intermodulation distortion suppression. Results are presented for the proposed predistorter for two amplifiers: one in a tri-band carrier aggregated LTE scenario in the sub 3 GHz frequencies and another in the millimeter-wave band, demonstrating the effectiveness of reducing the intermodulation products using 5G signals.

引用

页码：534 / 546

页数：13

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