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.
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)
作者简介
The corresponding author, e-mail： yucuiping@bupt.edu.cn.Cuiping Yu, received the B. Eng. degree in communication engineering from Jilin University, Jilin province, China, in 2004 and the Ph. D degree in electronic engineering from Beijing University of Posts and Telecommunications, Beijing, China, in 2010. At present she is an associate professor of BUPT. Her research interests include nonlinear modeling and linearization of transmitters/power amplifiers, high efficiency power amplifiers design, and multi-band components design.
Ziyuan Zhang, receive the B.Eng. degree in electron- ic engineering from Beijing University of Posts and Telecommunications （BUPT）, Beijing, China in 2015. Currently, he is pursuing the MS. degree in electrical engineering at BUPT, Beijing, China.Since 2015, he has been a MS student in the Institute of Smart Wireless mobile Information Technology, School of electrical engineering, BUPT. His research interests include nonlinear modeling and linearization of transmitters/power amplifiers.
