Research Article
Adaptive NLMS Pre-distorter of HPA with Memory Effect
@INPROCEEDINGS{10.1109/ChinaCom.2012.6417545, author={Junyeong Bok and Dong Geon An and Byung Gak Jo and Gwang Hoon Baek and Heung-Gyoon Ryu}, title={Adaptive NLMS Pre-distorter of HPA with Memory Effect}, proceedings={7th International Conference on Communications and Networking in China}, publisher={IEEE}, proceedings_a={CHINACOM}, year={2012}, month={9}, keywords={apsk satellite communication nlms pre-distorter memory effect twta}, doi={10.1109/ChinaCom.2012.6417545} }- Junyeong Bok
Dong Geon An
Byung Gak Jo
Gwang Hoon Baek
Heung-Gyoon Ryu
Year: 2012
Adaptive NLMS Pre-distorter of HPA with Memory Effect
CHINACOM
IEEE
DOI: 10.1109/ChinaCom.2012.6417545
Abstract
Single carrier M-APSK modulation technique is well used in satellite communication system due to the low PAPR so that the we can expect more resistance to the nonlinear distortion. Although TWTA has high amplification efficiency, it may produce serious non-linear distortion. Memory effect that can be observed in the very high speed data rate would be another harmful effect. In this paper, to compensate non-linear distortion efficiently in case of HPA model with the memory effect, we design adaptive predistorter using NLMS (normalized least mean square) algorithm. Through the simulation, we confirm that the predistorter using NLMS algorithm is able to improve the BER performance than existing pre-distorter.
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