Non-Overlapping Conditions to Enable Multi- Dimensional Behavioral Models/DPDs for Multi-Band or Non-Continuous Carrier Aggregation Systems  

作　　者：Cuiping Yu Ziyuan Zhang 

机构地区：[1]Beijing Key Laboratory of Work Safety Intelligent Monitoring, Beijing 100876, China [2]School of Electronic Engineering, Beijing University of Posts and Telecommunications, Beijing 100876, China

出　　处：《China Communications》2017年第2期30-39,共10页中国通信（英文版）

基　　金：supported by National Key Basic Research Program of China (973 Program) (No.2014CB339900);the National High Technology Research and Development Program of China (863 Program) (No. 2015AA016801);National Natural Science Foundations of China (No.61327806)

摘　　要：To linearize the multi.band PAs/transmitters, a serial of multi.band predistortion models based on multi.dimensional architecture have been proposed. However, most of these models work properly only for the signals whose harmonic and intermodulation products of carriers' non.overlap with the interested fundamental bands. In this paper, the non.overlapping conditions for dual.band and tri.band signals are derived and denoted in the form of closed.form expression. It can be used to verify whether a given dual.band/multi.band signals can be linearized properly by these multi.dimensional behavioral models. Also the conditions can be used to plan the frequency spacing and maximum bandwidth of a multi.band or non.continuous carrier aggregation signal. Several dual.band and triband signals were tested on the same PA, by employing 2.D DPD and 3.D DPD behavioral models. The measurement results show that the signals which don't satisfy the non.overlapping conditions cannot be linearized well by the multi.dimensional behavioral models which does not take the harmonic and intermodulation products of carriers' into account.To linearize the multi-band PAs/ transmitters, a serial of multi-band predistortion models based on multi-dimensional architecture have been proposed. However, most of these models work properly only for the signals whose harmonic and intermodula- tion products of carriers＇ non-overlap with the interested fundamental bands. In this paper, the non-overlapping conditions for dual-band and tri-band signals are derived and denoted in the form of closed-form expression. It can be used to verify whether a given dual-band/ multi-band signals can be linearized properly by these multi-dimensional behavioral models. Also the conditions can be used to plan the frequency spacing and maximum bandwidth of a multi-band or non-continuous carrier aggregation signal. Several dual-band and tri- band signals were tested on the same PA, by employing 2-D DPD and 3-D DPD behavioral models. The measurement results show that the signals which don＇t satisfy the non-overlapping conditions cannot be linearized well by the multi-dimensional behavioral models which does not take the harmonic and intermodulation products of carriers＇ into account.

关 键 词：PREDISTORTION multiband power amplifiers behavioral model carrier aggregation 

分 类 号：TN92[电子电信—通信与信息系统]