Digital Predistortion for Concurrent Multi-Band PAs with Inter-band IMD Compensation

被引：0

作者：

Su, Gongzhe ^{[1
]}

Chen, Wenhua ^{[1
]}

机构：

[1] Tsinghua Univ, Dept Elect Engn, Beijing, Peoples R China

来源：

2016 IEEE INTERNATIONAL WORKSHOP ON ELECTROMAGNETICS: APPLICATIONS AND STUDENT INNOVATION COMPETITION (IWEM) | 2016年

关键词：

D O I：

暂无

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 work attempts to suppress all unfilterable nonlinear distortions in concurrent multi-band power amplifiers (PAs). An even (evenly spaced) mode multi-band model is first derived and then generalized to address intermodulation (IMD) and cross-band modulation products located at the vicinity of the bands of interest. Then, based on only one feedback path, a direct learning method is proposed to compensate these nonlinear distortions. The efficacy of this proposed method is showcased by experimental results on a broadband class-AB GaN PA driven concurrently with 3 long term evolution (LTE) signals located at LTE band 1/2/3. Up to 18dB spectrum emissions suppression was achieved over 400MHz frequency range.

引用

页数：3