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http://dx.doi.org/10.5515/KJKIEES.2017.28.12.948

Design and Performance Evaluation of Predistorter to Compensate HPA Nonlinearity in 16-QAM System  

Jang, Kyeongsoo (Department of Electronic Engineering, Chungbuk National University)
Ryu, Heung-Gyoon (Department of Electronic Engineering, Chungbuk National University)
Publication Information
The Journal of Korean Institute of Electromagnetic Engineering and Science / v.28, no.12, 2017 , pp. 948-953 More about this Journal
Abstract
When using a high-power amplifier(HPA) for high-speed communication, the nonlinear characteristics of the HPA deteriorate power efficiency, bit error rate(BER) performance, and spectral efficiency. Because it is inevitable to use the HPA to obtain sufficient transmission power for high-speed communication, it is necessary to compensate for nonlinearity of the HPA by using a predistorter. In this study, a predistorter was used to compensate for the nonlinearity of the HPA, and the nonlinear distortion was compensated using the predistorter. Simulation results show that the compensation of the nonlinearity of the HPA using the predistorter achieves a BER performance similar to that of an ideal linear amplifier, and that the spectral mask is also satisfied.
Keywords
Predistorter; HPA Nonlinearity; Saleh Model; 16-QAM; Linearization;
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