Dynamic deviation reduction‐based concurrent dual‐band digital predistortion
Dynamic deviation reduction‐based concurrent dual‐band digital predistortion
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DOI：
10.1002/mmce.20773
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发表时间：
2014-05
期刊：
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通讯作者：
Haixia Xiang;Cuiping Yu;Jinchun Gao;Shulan Li;Yongle Wu;M. Su;Yuan’an Liu
中科院分区：
文献类型：
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作者：
Haixia Xiang;Cuiping Yu;Jinchun Gao;Shulan Li;Yongle Wu;M. Su;Yuan’an Liu
介绍了一种只有一个上变频单元的并行双频数字预失真(DPD)结构，该结构适用于并行双频激励的宽带功率放大器(PA)的线性化。通过将传统的动态偏差缩减(DDR)模型扩展到并发双频模式，提出了两种基于DDR的并发双频模型：双频DDR(DB-DDR)模型和简化的双频DDR(SDB-DDR)模型。用两种宽带功率放大器(GaN类F功率放大器和GaN Doherty功率放大器)对这两种模型的性能进行了实验评估，并与已有的二维数字预失真(2D-DPD)模型和二维修正记忆多项式(2D-MMP)模型进行了比较。仿真结果表明，该模型具有较好的DPD性能和较低的计算复杂度。©2013 Wiley期刊，Inc.Int J RF and Microwave CAE 24：401-411,2014。
This article introduces the concurrent dual‐band digital predistortion (DPD) architecture with only one upconvertion unit, which is suitable for the linearization of wideband power amplifiers (PAs) excited by concurrent dual‐band signals. By extending the conventional dynamic deviation reduction (DDR) model to the concurrent dual‐band mode, we propose two DDR‐based concurrent dual‐band models, the dual‐band DDR (DB‐DDR) model and the simplified dual‐band DDR (SDB‐DDR) model. The performance of these two models is experimentally assessed with two types of wideband PAs (a GaN Class F PA and a GaN Doherty PA) driven by the concurrent dual‐band signal, and compared with the prior two‐dimensional digital predistortion (2D‐DPD) model and the two‐dimensional modified memory polynomial (2D‐MMP) model. The results prove the good DPD performance and low computational complexity of the proposed models. © 2013 Wiley Periodicals, Inc. Int J RF and Microwave CAE 24:401–411, 2014.