NDLI: Performance analysis of envelope tracking power amplifier's envelope shaping methods for LTE mobile terminal application

Content Provider	IEEE Xplore Digital Library
Author	Yongbin Wu Xinning Zhu Xinshulin Li Hailun Xia Zhimin Zeng
Copyright Year	2014
Description	Author affiliation: Beijing Key Lab. of Network Syst. Archit. & Convergence, Beijing Univ. of Posts & Telecommun., Beijing, China (Yongbin Wu; Xinning Zhu; Xinshulin Li; Hailun Xia; Zhimin Zeng)
Abstract	Envelope tracking (ET) is a significant technique to improve the efficiency of power amplifier (PA) in the power back-off region, especially in modern mobile communication system with a high peak-to-average power ratio (PAPR). Different ET implementation solutions, especially the way of choosing shaping table, have a great impact on the performance of ET system. In this paper, a transistor-level PA and a behavior-level supply modulator are introduced to analyze the performance of ET PA system. The power-added efficiency (PAE), AM-to-AM distortion, AM-to-PM distortion and Adjacent Channel Leakage Ratio (ACLR) are investigated to explain the impacts of different commonly-used shaping methods. Simulation results indicate that adopting ET technology increases the efficiency of RF PA largely, and the shaping methods applied in supply modulation will affect a lot in efficiency and linearity. Consequently, a new dualmode ET shaping method is proposed in this paper to guarantee high efficiency as far as possible without introducing too much distortions. Besides, it also improves the linearity where the PAE is at a lower level.
Starting Page	768
Ending Page	773
File Size	2784121
Page Count	6
File Format	PDF
ISBN	9781479949120
DOI	10.1109/PIMRC.2014.7136268
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2014-09-02
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Distortion Power generation Radio frequency Linearity Modulation Distortion measurement Mobile communication
Content Type	Text
Resource Type	Article

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