7th International Conference on Communications and Networking in China

Research Article

Adaptive NLMS Pre-distorter of HPA with Memory Effect

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  • @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
Junyeong Bok1, Dong Geon An1, Byung Gak Jo2, Gwang Hoon Baek2, Heung-Gyoon Ryu1,*
  • 1: Chungbuk National University
  • 2: Agency for Defense Development
*Contact email: ecomm@cbu.ac.kr

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.

Keywords
apsk satellite communication nlms pre-distorter memory effect twta
Published
2012-09-13
Publisher
IEEE
http://dx.doi.org/10.1109/ChinaCom.2012.6417545
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