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http://dx.doi.org/10.5515/KJKIEES.2012.23.4.484

Linearity Enhancement of RF Power Amplifier Using Digital Pre-Distortion Based on Affine Projection Algorithm  

Seong, Yeon-Jung (School of Electronics, Telecommunication and Computer Engineering, Korea Aerospace University)
Cho, Choon-Sik (School of Electronics, Telecommunication and Computer Engineering, Korea Aerospace University)
Lee, Jae-Wook (School of Electronics, Telecommunication and Computer Engineering, Korea Aerospace University)
Publication Information
The Journal of Korean Institute of Electromagnetic Engineering and Science / v.23, no.4, 2012 , pp. 484-490 More about this Journal
Abstract
In this paper, we design a digitally pre-distorted RF power amplifier operating in 900 MHz band. The linearity of RF power amplifier is improved by employing the digital pre-distortion(DPD) based on affine projection(AP) algorithm, where the look-up table(LUT) method is used with non-linear indexing. The proposed DPD with AP algorithm is compared with that with normalized least mean square(NLMS) algorithm, applied to the RF power amplifier. A commercial power amplifier module is used for verification of the proposed algorithm which shows improvement of adjacent channel leakage ratio(ACLR) by about 21 dB.
Keywords
Digital Pre-Distortion; Affine Projection Algorithm; Look-Up Table Method;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
연도 인용수 순위
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