Journal of the Institute of Electronics Engineers of Korea TC (대한전자공학회논문지TC)

The Institute of Electronics and Information Engineers (대한전자공학회)
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Modified Clipping for Iterative Decoding of Superposition Coding

중첩 부호의 반복 복호를 위한 개선된 클리핑 기법

  • 얀이얼 (전북대학교 전자정보공학부) ;
  • 김정기 (전북대학교 전자정보공학부) ;
  • 진주 (전북대학교 전자정보공학부) ;
  • 이문호 (전북대학교 전자정보공학부)
  • Published : 2008.02.25
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Abstract

In this paper, we propose a modified clipping scheme for iterative decoding of superposition coding system by losing less power than clipping scheme. Our proposed scheme in superposition coding system shows good performance in peak-to-average power ratio(PAPR) and system performance with the same Clipping Ratio especially in low Clipping Ratio case. Finally in order to alleviate the performance degradation due to clipping noises, we combine a soft compensation algorithm that is combined with soft-input-soft-output(SISO) decoding algorithms in an iterative manner proposed by [1][2]. Simulation results show that with the proposed scheme, most performance loss can be recovered.

본 논문에서는 클리핑 설계보다 파워를 덜 잃음으로서 중첩 코딩 시스템의 반복 복호를 위한 수정 클리핑 설계를 제안한다. 중첩코딩 시스템에서 제안한 설계는 특히 저 클리핑율의 경우에서 같은 클리핑 비율로 PAPR과 시스템 성능면에서 좋은 성능을 보였다. 마지막으로 클리핑 잡음 때문에 성능이 열화하는 것을 경감시키기 위해서 [1],[2]에서 제안한 반복 방법으로 SISO 복호알고리즘과 결합된 연 보상 알고리즘을 제안한다. 시뮬레이션 결과들은 제안한 설계로 대다수의 성능 손실이 회복될수 있다는 것을 보였다.

Keywords

References

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