NDLI: A 3.7GHz GaN HEMT Doherty power amplifier using digital predistortion linearization

Content Provider	IEEE Xplore Digital Library
Author	Jonghyuk Jeong Van, J. Jaeyong Cho Min-su Kim Hanjin Cho Kyung-hoon Lim Sung-wook Kwon Kyonggon Choi Hyung-chul Kim Sungcheol Yoo Youngoo Yang
Copyright Year	2008
Description	Author affiliation: Sch. of Inf. & Commun. Eng., Sungkyunkwan Univ., Suwon (Jonghyuk Jeong; Van, J.; Jaeyong Cho; Min-su Kim; Hanjin Cho; Kyung-hoon Lim; Sung-wook Kwon; Kyonggon Choi; Hyung-chul Kim; Sungcheol Yoo; Youngoo Yang)
Abstract	In this study, we implemented a 3.7 GHz band Doherty amplifier based on GaN HEMTs which was linearized using a digital predistortion method. The forward and reverse models of the predistortion consist of simple polynomials whose coefficients are extracted using a conventional LMSE algorithm. Using two carrier signals based on IEEE 802.16e, whose PAR is 9.44 dB, an ACLR improvement of 10.74 dB was achieved to give an ACLR level of 41.74 dBc at an offset of 4.79 MHz. The overall efficiency of the Doherty power amplifier is 13.74% which represents a 2.44% improvement compared to that of a balanced class-AB power amplifier at an average power of 36 dBm.
Starting Page	1
Ending Page	4
File Size	293858
Page Count	4
File Format	PDF
ISBN	9781424426416
DOI	10.1109/APMC.2008.4958375
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2008-12-16
Publisher Place	China
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Gallium nitride HEMTs Power amplifiers Predistortion Polynomials Operational amplifiers Power generation High power amplifiers Radiofrequency amplifiers Linearity
Content Type	Text
Resource Type	Article

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4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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