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A Transistor-Based Analog Predistorter With Unequal Delays for Memory Compensation SCIE SCOPUS

Title
A Transistor-Based Analog Predistorter With Unequal Delays for Memory Compensation
Authors
Lee, YSLee, MWKam, SHJeong, YH
Date Issued
2009-11
Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
Abstract
A transistor-based analog predistorter (APD) with memory effect compensation is represented. The nonlinearity of a gain amplifier generated by a low supply voltage is used as an error generator. The predistorted signal by the unequal-delayed nonlinear paths improves the linearity by compensating for memory effects of the power amplifier (PA). For verification, the proposed APD with three-branch nonlinear paths is implemented with a 30-W class-AB PA and tested using two-tone and various wideband code division multiple access (WCDMA) signals at 2.14 GHz. From the measured results, the proposed APD significantly improves the linearity of the PA with memory effects.
Keywords
Analog predistorter (APD); delay; linearity; memory effects; power amplifier (PA); AMPLIFIERS
URI
https://oasis.postech.ac.kr/handle/2014.oak/27760
DOI
10.1109/LMWC.2009.2032024
ISSN
1531-1309
Article Type
Article
Citation
IEEE MICROWAVE AND WIRELESS COMPONENTS LETTERS, vol. 19, no. 11, page. 743 - 745, 2009-11
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정윤하JEONG, YOON HA
Dept of Electrical Enginrg
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