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Content Provider | IEEE Xplore Digital Library |
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Author | Kyung-Hoon Lim Gunhyun Ahn Sungchan Jung Hyun-Chul Park Min-Su Kim Ju-Ho Van Hanjin Cho Jong-Hyuk Jeong Cheon-Seok Park Youngoo Yang |
Copyright Year | 2004 |
Abstract | In this brief, we present a 60-W power amplifier that is linearized using an RF predistorter for multicarrier wideband code-division multiple-access (WCDMA) applications. The proposed RF predistorter is fully composed of RF or analog circuits, and it has a moderate memory effect compensation capability using a delayed third-order intermodulation (IM3) component path. It also includes the IM5 generation circuits and a compact IM3 generator that is capable of autocanceling for the fundamental component. The proposed RF predistorter was implemented and applied to a 60-W high-power WCDMA amplifier. For a four-carrier downlink WCDMA signal, the RF predistorter improved the adjacent channel leakage power ratio at a 5-MHz offset by 6.19 dB at an average output power of 48 dBm. The total efficiency of the system is as high as 13.6% at the same output power level. At an output power level of 60 W, the linearized power amplifier complies with the linearity specification of the WCDMA system. |
Sponsorship | IEEE Circuits and Systems Society |
Starting Page | 265 |
Ending Page | 269 |
Page Count | 5 |
File Size | 672326 |
File Format | |
ISSN | 15497747 |
Volume Number | 56 |
Issue Number | 4 |
Language | English |
Publisher | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
Publisher Date | 2009-04-01 |
Publisher Place | U.S.A. |
Access Restriction | One Nation One Subscription (ONOS) |
Rights Holder | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
Subject Keyword | Multiaccess communication Power amplifiers Radiofrequency amplifiers Radio frequency Power generation Broadband amplifiers Analog circuits Delay effects High power amplifiers Downlink predistorter Intermodulation distortion (IMD) memory effect multicarrier power amplifier power amplifier |
Content Type | Text |
Resource Type | Article |
Subject | Electrical and Electronic Engineering |
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